# Difference: OnlineBeamSpotPublicResults (1 vs. 6)

#### Revision 62012-06-06 - FrankWinklmeier

Line: 1 to 1

 META TOPICPARENT name="TriggerPublicResults"
Line: 36 to 36
Approved plots that can be shown by ATLAS speakers at conferences and similar events. Please do not add figures on your own. Contact the responsible project leader in case of questions and/or suggestions. Follow the guidelines on the trigger public results page.
Changed:
<
<

>
>

Line: 385 to 583

Changed:
<
<

>
>

# 2010 Running (7 TeV, beta*=2m, up to 368 bunches)

<!--/twistyPlugin twikiMakeVisibleInline-->
Line: 591 to 789

<!--For significant updates to the topic, consider adding your 'signature' (beneath this editing box)-->
-- RainerBartoldus - 13-Jun-2011
>
>
-- FrankWinklmeier - 06-Jun-2012

<!--Person responsible for the page:
Either leave as is - the creator's name will be inserted; 
Line: 648 to 847

 META FILEATTACHMENT attachment="bcid_vs_posZ_pm_posZErr.png" attr="" comment="Luminous centroid z for individual bunches of run 182787" date="1308428473" name="bcid_vs_posZ_pm_posZErr.png" path="bcid_vs_posZ_pm_posZErr.png" size="222412" stream="bcid_vs_posZ_pm_posZErr.png" tmpFilename="/usr/tmp/CGItemp18473" user="bartoldu" version="1" attachment="bcid_vs_posZ_pm_posZErr.pdf" attr="" comment="Luminous centroid z for individual bunches of run 182787" date="1308428528" name="bcid_vs_posZ_pm_posZErr.pdf" path="bcid_vs_posZ_pm_posZErr.pdf" size="73438" stream="bcid_vs_posZ_pm_posZErr.pdf" tmpFilename="/usr/tmp/CGItemp18483" user="bartoldu" version="1" attachment="Run182787_Vertex_XvsY_SiTrack_onelb.pdf" attr="" comment="2D x vs y histogram of beam spot vertices" date="1320072723" name="Run182787_Vertex_XvsY_SiTrack_onelb.pdf" path="Run182787_Vertex_XvsY_SiTrack_onelb.pdf" size="23564" stream="Run182787_Vertex_XvsY_SiTrack_onelb.pdf" tmpFilename="/usr/tmp/CGItemp44704" user="jcogan" version="1"
>
>
 META FILEATTACHMENT attachment="beamspot_updatetime.pdf" attr="" comment="Beam spot update time" date="1338997971" name="beamspot_updatetime.pdf" path="beamspot_updatetime.pdf" size="14338" user="fwinkl" version="1" attachment="beamspot_updatetime.png" attr="" comment="Beam spot update time" date="1338997971" name="beamspot_updatetime.png" path="beamspot_updatetime.png" size="18240" user="fwinkl" version="1" attachment="first_update.pdf" attr="" comment="" date="1338997971" name="first_update.pdf" path="first_update.pdf" size="14182" user="fwinkl" version="1" attachment="first_update.png" attr="" comment="" date="1338997971" name="first_update.png" path="first_update.png" size="16884" user="fwinkl" version="1" attachment="run203602_beamposX.pdf" attr="" comment="" date="1338997971" name="run203602_beamposX.pdf" path="run203602_beamposX.pdf" size="24993" user="fwinkl" version="1" attachment="run203602_beamposX.png" attr="" comment="" date="1338997971" name="run203602_beamposX.png" path="run203602_beamposX.png" size="23684" user="fwinkl" version="1" attachment="run203602_beamposY.pdf" attr="" comment="" date="1338997971" name="run203602_beamposY.pdf" path="run203602_beamposY.pdf" size="25080" user="fwinkl" version="1" attachment="run203602_beamposY.png" attr="" comment="" date="1338997971" name="run203602_beamposY.png" path="run203602_beamposY.png" size="25091" user="fwinkl" version="1" attachment="run203602_beamposZ.pdf" attr="" comment="" date="1338997971" name="run203602_beamposZ.pdf" path="run203602_beamposZ.pdf" size="24729" user="fwinkl" version="1" attachment="run203602_beamposZ.png" attr="" comment="" date="1338997971" name="run203602_beamposZ.png" path="run203602_beamposZ.png" size="21809" user="fwinkl" version="1" attachment="run203602_beamsigmaX.pdf" attr="" comment="" date="1338998011" name="run203602_beamsigmaX.pdf" path="run203602_beamsigmaX.pdf" size="29431" user="fwinkl" version="1" attachment="run203602_beamsigmaX.png" attr="" comment="" date="1338998011" name="run203602_beamsigmaX.png" path="run203602_beamsigmaX.png" size="24496" user="fwinkl" version="1" attachment="run203602_beamsigmaY.pdf" attr="" comment="" date="1338998011" name="run203602_beamsigmaY.pdf" path="run203602_beamsigmaY.pdf" size="29424" user="fwinkl" version="1" attachment="run203602_beamsigmaY.png" attr="" comment="" date="1338998011" name="run203602_beamsigmaY.png" path="run203602_beamsigmaY.png" size="24713" user="fwinkl" version="1" attachment="run203602_beamsigmaZ.pdf" attr="" comment="" date="1338998011" name="run203602_beamsigmaZ.pdf" path="run203602_beamsigmaZ.pdf" size="22926" user="fwinkl" version="1" attachment="run203602_beamsigmaZ.png" attr="" comment="" date="1338998011" name="run203602_beamsigmaZ.png" path="run203602_beamsigmaZ.png" size="20316" user="fwinkl" version="1" attachment="update_count.pdf" attr="" comment="" date="1338998011" name="update_count.pdf" path="update_count.pdf" size="21519" user="fwinkl" version="1" attachment="update_count.png" attr="" comment="" date="1338998011" name="update_count.png" path="update_count.png" size="21429" user="fwinkl" version="1" attachment="update_perrun.pdf" attr="" comment="" date="1338998011" name="update_perrun.pdf" path="update_perrun.pdf" size="14142" user="fwinkl" version="1" attachment="update_perrun.png" attr="" comment="" date="1338998011" name="update_perrun.png" path="update_perrun.png" size="16079" user="fwinkl" version="1"

#### Revision 52011-10-31 - JoshCogan

Line: 1 to 1

 META TOPICPARENT name="TriggerPublicResults"
Line: 608 to 608

 META FILEATTACHMENT attachment="Run182787_Vertexz_SiTrack.png" attr="" comment="Vertex z distribution for one LB of run 182787" date="1308420566" name="Run182787_Vertexz_SiTrack.png" path="Run182787_Vertexz_SiTrack.png" size="267926" stream="Run182787_Vertexz_SiTrack.png" tmpFilename="/usr/tmp/CGItemp13589" user="bartoldu" version="1" attachment="Run182787_Vertexz_SiTrack.pdf" attr="" comment="Vertex z distribution for one LB of run 182787" date="1308420599" name="Run182787_Vertexz_SiTrack.pdf" path="Run182787_Vertexz_SiTrack.pdf" size="16963" stream="Run182787_Vertexz_SiTrack.pdf" tmpFilename="/usr/tmp/CGItemp13561" user="bartoldu" version="1" attachment="Run182787_Vertex_XvsY_SiTrack.png" attr="" comment="Vertex x vs y distribution for one LB of run 182787" date="1308421493" name="Run182787_Vertex_XvsY_SiTrack.png" path="Run182787_Vertex_XvsY_SiTrack.png" size="474930" stream="Run182787_Vertex_XvsY_SiTrack.png" tmpFilename="/usr/tmp/CGItemp18525" user="bartoldu" version="3"
Changed:
<
<
 META FILEATTACHMENT attachment="Run182787_Vertex_XvsY_SiTrack.pdf" attr="" comment="Vertex x vs y distribution for run 182787" date="1308421619" name="Run182787_Vertex_XvsY_SiTrack.pdf" path="Run182787_Vertex_XvsY_SiTrack.pdf" size="36329" stream="Run182787_Vertex_XvsY_SiTrack.pdf" tmpFilename="/usr/tmp/CGItemp18498" user="bartoldu" version="2"
>
>
 META FILEATTACHMENT attachment="Run182787_Vertex_XvsY_SiTrack.pdf" attr="" comment="Vertex x vs y distribution for run 182787" date="1320073058" name="Run182787_Vertex_XvsY_SiTrack.pdf" path="Run182787_Vertex_XvsY_SiTrack.pdf" size="23564" stream="Run182787_Vertex_XvsY_SiTrack.pdf" tmpFilename="/usr/tmp/CGItemp54521" user="jcogan" version="3"

 META FILEATTACHMENT attachment="Run182787_Vertex_XvsY_SiTrack_EOR.png" attr="" comment="Vertex x vs y distribution for run 182787" date="1308421584" name="Run182787_Vertex_XvsY_SiTrack_EOR.png" path="Run182787_Vertex_XvsY_SiTrack_EOR.png" size="842670" stream="Run182787_Vertex_XvsY_SiTrack_EOR.png" tmpFilename="/usr/tmp/CGItemp18532" user="bartoldu" version="1" attachment="Run182787_Vertex_XvsY_SiTrack_EOR.pdf" attr="" comment="Vertex x vs y distribution for run 182787" date="1308422457" name="Run182787_Vertex_XvsY_SiTrack_EOR.pdf" path="Run182787_Vertex_XvsY_SiTrack_EOR.pdf" size="36329" stream="Run182787_Vertex_XvsY_SiTrack_EOR.pdf" tmpFilename="/usr/tmp/CGItemp18476" user="bartoldu" version="1" attachment="Run182787_TrackD0Phi_SiTrack.png" attr="" comment="Track d0 vs phi distribution for one LB of run 182787" date="1308422934" name="Run182787_TrackD0Phi_SiTrack.png" path="Run182787_TrackD0Phi_SiTrack.png" size="240882" stream="Run182787_TrackD0Phi_SiTrack.png" tmpFilename="/usr/tmp/CGItemp18523" user="bartoldu" version="1"
Line: 647 to 647

 META FILEATTACHMENT attachment="bcid_vs_posY_pm_posYErr.pdf" attr="" comment="Luminous centroid y for individual bunches of run 182787" date="1308428432" name="bcid_vs_posY_pm_posYErr.pdf" path="bcid_vs_posY_pm_posYErr.pdf" size="73389" stream="bcid_vs_posY_pm_posYErr.pdf" tmpFilename="/usr/tmp/CGItemp18460" user="bartoldu" version="1" attachment="bcid_vs_posZ_pm_posZErr.png" attr="" comment="Luminous centroid z for individual bunches of run 182787" date="1308428473" name="bcid_vs_posZ_pm_posZErr.png" path="bcid_vs_posZ_pm_posZErr.png" size="222412" stream="bcid_vs_posZ_pm_posZErr.png" tmpFilename="/usr/tmp/CGItemp18473" user="bartoldu" version="1" attachment="bcid_vs_posZ_pm_posZErr.pdf" attr="" comment="Luminous centroid z for individual bunches of run 182787" date="1308428528" name="bcid_vs_posZ_pm_posZErr.pdf" path="bcid_vs_posZ_pm_posZErr.pdf" size="73438" stream="bcid_vs_posZ_pm_posZErr.pdf" tmpFilename="/usr/tmp/CGItemp18483" user="bartoldu" version="1"
>
>
 META FILEATTACHMENT attachment="Run182787_Vertex_XvsY_SiTrack_onelb.pdf" attr="" comment="2D x vs y histogram of beam spot vertices" date="1320072723" name="Run182787_Vertex_XvsY_SiTrack_onelb.pdf" path="Run182787_Vertex_XvsY_SiTrack_onelb.pdf" size="23564" stream="Run182787_Vertex_XvsY_SiTrack_onelb.pdf" tmpFilename="/usr/tmp/CGItemp44704" user="jcogan" version="1"

#### Revision 42011-06-28 - RainerBartoldus

Line: 1 to 1

 META TOPICPARENT name="TriggerPublicResults"
Line: 36 to 36
Approved plots that can be shown by ATLAS speakers at conferences and similar events. Please do not add figures on your own. Contact the responsible project leader in case of questions and/or suggestions. Follow the guidelines on the trigger public results page.
Changed:
<
<

>
>

# 2011 Running (7 TeV, beta*=1.5m, up to 1318 bunches)

## Vertex Distributions

#### Revision 32011-06-27 - RainerBartoldus

Line: 1 to 1

 META TOPICPARENT name="TriggerPublicResults"
Line: 7 to 7

>
>
<!--  -->

/* put your CSS code here */

td
{
vertical-align:top;
border:10 white;
}

table
{
width:100%;
bgcolor:#f5f5fa;
border:1;
/* cellspacing:10; */
}

<!--  -->

# Introduction

<!-- Add an introduction here, describing the purpose of this topic. -->

Approved plots that can be shown by ATLAS speakers at conferences and similar events. Please do not add figures on your own. Contact the responsible project leader in case of questions and/or suggestions. Follow the guidelines on the trigger public results page.

Changed:
<
<

>
>

# 2011 Running (7 TeV, beta*=1.5m, up to 1236 bunches)

## Vertex Distributions

Changed:
<
<
>
>

Line: 34 to 56
still dominated by the intrinsic resolution.
Changed:
<
<

[png] [pdf]
>
>

png pdf

Line: 52 to 74
still dominated by the intrinsic resolution.
Changed:
<
<

[png] [pdf]
>
>

png pdf

Line: 69 to 91
length, which is much larger than the intrinsic resolution.
Changed:
<
<

[png] [pdf]
>
>

png pdf

Line: 84 to 106
1 minute of data taking and contains well over 100\,000 vertices.
Changed:
<
<

[png] [pdf]
>
>

png pdf

Line: 100 to 122

Changed:
<
<

[png] [pdf]
>
>

png pdf

Line: 119 to 141
vertical tilt angles.
Changed:
<
<

[png] [pdf]
[png] [pdf]
>
>

png pdf
png pdf

Line: 134 to 156

## Track Distributions

Changed:
<
<
>
>

Line: 153 to 174
and is in excellent agreement with it.
Changed:
<
<

[png] [pdf]
>
>

png pdf

Line: 164 to 185

## Resolution Correction

Changed:
<
<
>
>

Line: 187 to 207

Changed:
<
<

>
>

[png] [pdf]
Changed:
<
<

>
>

[png][pdf]
Deleted:
<
<

 Displacement in z Between Split Vertices
Line: 219 to 235

Changed:
<
<

>
>

[png][pdf]
Line: 243 to 259

Changed:
<
<

>
>
[
[png] [pdf]
Changed:
<
<

>
>

[png][pdf]
Line: 266 to 282

Changed:
<
<

>
>

[png][pdf]
Line: 278 to 294

## Time Evolutions

Changed:
<
<
>
>

Line: 292 to 307
days.
Changed:
<
<

[png] [pdf]
[png] [pdf]
[png] [pdf]
>
>

png pdf
png pdf
png pdf

>
>

 Time-Evolution of the Luminous Width (four days)
Line: 318 to 335
the order of 10\% for a 10 hour long fill.
Changed:
<
<

[png] [pdf]
[png] [pdf]
[png] [pdf]
>
>

png pdf
png pdf
png pdf

Line: 336 to 353

## Bunch-by-bunch Distributions

Changed:
<
<
>
>

Line: 345 to 361
Luminous Centroid for Individual Bunches

The luminous centroid position in x, y, and z

Changed:
<
<
measured in the High Level Trigger for each colliding bunch pair
>
>
measured in the High Level Trigger for each of the 1024 colliding bunch pairs
separately. Distinct structures are visible, in particular in the vertical position of the interaction-point, with variations of up to 5\,$\mu$m and repeating patterns across the injected bunch trains.
Changed:
<
<

[png] [pdf]
[png] [pdf]
[png] [pdf]
>
>

png pdf
png pdf
png pdf

Line: 369 to 385

Changed:
<
<

>
>

# 2010 Running (7 TeV, beta*=2m, up to 368 bunches)

<!--/twistyPlugin twikiMakeVisibleInline-->
Changed:
<
<
>
>

Changed:
<
<
 Horizontal luminous centroid (horizontal "beam spot" position) Online luminous region measurements at $\sqrt{s}=7$~TeV. These measurements were available online in real time as soon as the high-level trigger was activated for the first high energy collisions at the LHC. Gaussian fits (within $\pm1\times RMS$ for $x$,$y$) are used to extract the luminous region mean position and width, where the latter is dominated by the vertexing resolution. An excellent agreement is observed using different tracking algorithms online and with respect to the more sophisticated offline beam spot measurement.
>
>
 Horizontal luminous centroid (horizontal "beam spot" position) Online luminous region measurements at $\sqrt{s}=7$~TeV. These measurements were available online in real time as soon as the high-level trigger was activated for the first high energy collisions at the LHC. Gaussian fits (within $\pm1\times RMS$ for $x$,$y$) are used to extract the luminous region mean position and width, where the latter is dominated by the vertexing resolution. An excellent agreement is observed using different tracking algorithms online and with respect to the more sophisticated offline beam spot measurement.

Changed:
<
<

[png] [eps]
>
>

png eps

Changed:
<
<
 Vertical luminous centroid (vertical "beam spot" position)
>
>
 Vertical luminous centroid (vertical "beam spot" position)
Online luminous region measurements at $\sqrt{s}=7$~TeV. These measurements were available online in real time as soon as the high-level trigger was activated for the first high energy
Line: 398 to 422
online and with respect to the more sophisticated offline beam spot measurement.
Changed:
<
<

png eps
>
>

png eps

Changed:
<
<
 Longitudinal luminous centroid (longitudinal "beam spot" position) Online luminous region measurements at $\sqrt{s}=7$~TeV. These measurements were available online in real time as soon as the high-level trigger was activated for the first high energy collisions at the LHC. Gaussian fits (within $\pm1\times RMS$ for $x$,$y$) are used to extract the luminous region mean position and width, where the latter is dominated by the vertexing resolution. An excellent agreement is observed using different tracking algorithms online and with respect to the more sophisticated offline beam spot measurement. [png] [eps]
>
>

 Longitudinal luminous centroid (longitudinal "beam spot" position) Online luminous region measurements at $\sqrt{s}=7$~TeV. These measurements were available online in real time as soon as the high-level trigger was activated for the first high energy collisions at the LHC. Gaussian fits (within $\pm1\times RMS$ for $x$,$y$) are used to extract the luminous region mean position and width, where the latter is dominated by the vertexing resolution. An excellent agreement is observed using different tracking algorithms online and with respect to the more sophisticated offline beam spot measurement. [png] [eps] Luminous centroid ("beam spot") position measured with tracks Luminous centroid ("beam spot") position measured online using only level two tracking at $\sqrt{s}=7$ TeV. The transverse impact parameter ($d_{0}$) versus $\phi$ measures the transverse luminous centroid ("beam spot") position using a sinusoidal fit of $d_{0}$ as a function of $\phi$. The track-based result agrees to within 8 $\mu$m in $x$ and within 3 $\mu$m in $y$ with the positions measured via vertex fitting on an event-by-event basis. Point-by-point error bars are too small to be visible. [png] [eps] Horizontal luminous tilt angle The horizontal and vertical luminous tilt angles with respect to the ATLAS coordinate system are measured online at $\sqrt{s}=7$ TeV. Vertices are binned in two dimensions along $z$ and a Gaussian fit along the transverse direction is used to extract the mean position. The errors indicate the error on this mean. The slope is measured with a linear fit versus $z$ to extract the horizontal and vertical tilt angles, and in both cases agrees with the offline result to within 70 $\mu$rad. [png] [eps] Vertical luminous tilt angle The horizontal and vertical luminous tilt angles with respect to the ATLAS coordinate system are measured online at $\sqrt{s}=7$ TeV. Vertices are binned in two dimensions along $z$ and a Gaussian fit along the transverse direction is used to extract the mean position. The errors indicate the error on this mean. The slope is measured with a linear fit versus $z$ to extract the horizontal and vertical tilt angles, and in both cases agrees with the offline result to within 70 $\mu$rad. [png] [eps]

<!--/twistyPlugin-->

Changed:
<
<
 Luminous centroid ("beam spot") position measured with tracks Luminous centroid ("beam spot") position measured online using only level two tracking at $\sqrt{s}=7$ TeV. The transverse impact parameter ($d_{0}$) versus $\phi$ measures the transverse luminous centroid ("beam spot") position using a sinusoidal fit of $d_{0}$ as a function of $\phi$. The track-based result agrees to within 8 $\mu$m in $x$ and within 3 $\mu$m in $y$ with the positions measured via vertex fitting on an event-by-event basis. Point-by-point error bars are too small to be visible. [png] [eps]
>
>

# 2009 Running (900 GeV, beta*=11m, 1-9 bunches)

Changed:
<
<
 Horizontal luminous tilt angle The horizontal and vertical luminous tilt angles with respect to the ATLAS coordinate system are measured online at $\sqrt{s}=7$ TeV. Vertices are binned in two dimensions along $z$ and a Gaussian fit along the transverse direction is used to extract the mean position. The errors indicate the error on this mean. The slope is measured with a linear fit versus $z$ to extract the horizontal and vertical tilt angles, and in both cases agrees with the offline result to within 70 $\mu$rad. [png] [eps]
>
>
<!--/twistyPlugin twikiMakeVisibleInline-->

Changed:
<
<
 Vertical luminous tilt angle The horizontal and vertical luminous tilt angles with respect to the ATLAS coordinate system are measured online at $\sqrt{s}=7$ TeV. Vertices are binned in two dimensions along $z$ and a Gaussian fit along the transverse direction is used to extract the mean position. The errors indicate the error on this mean. The slope is measured with a linear fit versus $z$ to extract the horizontal and vertical tilt angles, and in both cases agrees with the offline result to within 70 $\mu$rad. [png] [eps]
>
>

## Vertex Distributions

Changed:
<
<
 Relative luminosity from HLT vertex counting Relative luminosity measurement measured via vertex counting and compared to the Liquid-Argon (LAr) calorimeter measurement for run 142193 (LHC fill number 911). The profile measured online using vertices follows the observed decay from the LAr with a very high precision after normalization to the LAr measurement. The nearly identical shape indicates that the level of background is likely to be small for the vertex counting method, or at least nearly constant with respect to time and luminosity. [png] [eps]
>
>

Changed:
<
<
 Vertex X distribution per colliding bunch (BCID) for run 142383 The monitored luminous region position (X,Y,Z) and relative luminosity per bunch ($N_{\rm vertex}$) are monitored as a function of the fill pattern of the LHC. These quantities are available online for every luminosity block and provide information relevant to the both the trigger and the data quality, as well as the machine conditions. [png] [eps]
>
>
 Vertex X distribution per colliding bunch (BCID) for run 142383 The monitored luminous region position (X,Y,Z) and relative luminosity per bunch ($N_{\rm vertex}$) are monitored as a function of the fill pattern of the LHC. These quantities are available online for every luminosity block and provide information relevant to the both the trigger and the data quality, as well as the machine conditions. [png] [eps]

Changed:
<
<
 Vertex Y distribution per colliding bunch (BCID) for run 142383 The monitored luminous region position (X,Y,Z) and relative luminosity per bunch ($N_{\rm vertex}$) are monitored as a function of the fill pattern of the LHC. These quantities are available online for every luminosity block and provide information relevant to the both the trigger and the data quality, as well as the machine conditions. [png] [eps]
>
>
 Vertex Y distribution per colliding bunch (BCID) for run 142383 The monitored luminous region position (X,Y,Z) and relative luminosity per bunch ($N_{\rm vertex}$) are monitored as a function of the fill pattern of the LHC. These quantities are available online for every luminosity block and provide information relevant to the both the trigger and the data quality, as well as the machine conditions. [png] [eps]

Changed:
<
<
 Vertex Z distribution per colliding bunch (BCID) for run 142383 The monitored luminous region position (X,Y,Z) and relative luminosity per bunch ($N_{\rm vertex}$) are monitored as a function of the fill pattern of the LHC. These quantities are available online for every luminosity block and provide information relevant to the both the trigger and the data quality, as well as the machine conditions. [png] [eps]
>
>
 Vertex Z distribution per colliding bunch (BCID) for run 142383 The monitored luminous region position (X,Y,Z) and relative luminosity per bunch ($N_{\rm vertex}$) are monitored as a function of the fill pattern of the LHC. These quantities are available online for every luminosity block and provide information relevant to the both the trigger and the data quality, as well as the machine conditions. [png] [eps]

Changed:
<
<
 Average vertex multiplicity per event and per colliding bunch (BCID) for run 142383 The monitored luminous region position (X,Y,Z) and relative luminosity per bunch ($N_{\rm vertex}$) are monitored as a function of the fill pattern of the LHC. These quantities are available online for every luminosity block and provide information relevant to the both the trigger and the data quality, as well as the machine conditions. [png] [eps]
>
>

 Average vertex multiplicity per event and per colliding bunch (BCID) for run 142383 The monitored luminous region position (X,Y,Z) and relative luminosity per bunch ($N_{\rm vertex}$) are monitored as a function of the fill pattern of the LHC. These quantities are available online for every luminosity block and provide information relevant to the both the trigger and the data quality, as well as the machine conditions. [png] [eps] Relative luminosity from HLT vertex counting Relative luminosity measurement measured via vertex counting and compared to the Liquid-Argon (LAr) calorimeter measurement for run 142193 (LHC fill number 911). The profile measured online using vertices follows the observed decay from the LAr with a very high precision after normalization to the LAr measurement. The nearly identical shape indicates that the level of background is likely to be small for the vertex counting method, or at least nearly constant with respect to time and luminosity. [png] [eps]

 Vertex X distribution for run 141811 This distribution represents the transverse distribution in X of vertices reconstructed by the LVL2 trigger (online) Atlas.BeamSpot algorithm in run141811. This is the first run for which the HLT was active (in passthrough mode) and the silicon detectors were at their fully operational bias voltages. We measure a horizontal position of X = 160.7 +/- 6um with an observed width of 240um for the core of the distribution.
Changed:
<
<

png eps
>
>

png eps

 Vertex Y distribution for run 141811 This distribution represents the transverse distribution in Y of vertices reconstructed by the LVL2 trigger (online) Atlas.BeamSpot algorithm in run141811.This is the first run for which the HLT was active (in passthrough mode) and the silicon detectors were at their fully operational bias voltages. We measure a vertical position of Y = 955 +/- 7um with an observed width of 280um for the core of the distribution.
Changed:
<
<

png eps
>
>

png eps

 Vertex Z distribution for run 141811 (BCID = 1, 2674) This plot represents the longitudinal distribution of vertices reconstructed by the LVL2 trigger (online) Atlas.BeamSpot algorithms for run 141811. Thiswas the very first run for which the HLT was active (in passthrough mode) and the Silcon detectors (Pixel and SCT) were at their fully operational bias voltages. We have separated the distribution into the two bunch crossing identifiers (BCID) for the two pairs of colliding bunches in the LHC machine. We can see that BCID = 2674 has a higher intensity than BCID = 1 due to the 50% larger number of vertices reconstructed. The mean longitudinal positions and extent are compatible within errors.
Changed:
<
<

png eps
>
>

png eps

 Track transverse impact parameter vs. phi distribution for run 141811 This distribution represents the track impact parameter variation as a function of the azimuthal angle, phi, of the track. Tracks used here arerequired to have a transverse momentum greater than 500 MeV. The sinusoidal variation is indicative of an underlying interaction point offset with respect to the center of the nominal ATLAS coordinate system, or (0,0,0). By fitting a sinusoidal function with two components, we can immediately extract the position of the interaction point in the transverse plane. We measure this position to be X = 163.6 +/- 8um and Y = 904.1 +/- 9um, which is in good agreement with the vertex-based measurement.
Changed:
<
<
 png eps
>
>
 /twiki/pub/AtlasPublic/TriggerOperationPublicResults png eps

 The transverse distribution in X of vertices reconstructed by the online beam spot algorithm in run 142913. We measure the average horizontal position as X = 253 +/- 2um with an observed width of 278um including resolution.
Changed:
<
<

png
>
>

png

 The transverse distribution in Y of vertices reconstructed by the online beam spot algorithm in run 142913. We measure the average vertical position as Y = 877 +/- 2um with an observed width of 345um including resolution.
Changed:
<
<

png
>
>

png

 The longitudinal distribution of vertices reconstructed by the online beam spot algorithm for run 142193. We measure an average position of Z = -7.99 +/- 0.24 mm with an observed width of 41 mm including resolution.
Changed:
<
<

png
>
>

png

 The distribution of primary vertices in the transverse plane reconstructed by the online beam spot algorithm for run 142193. Vertices are fitted from 2 or more tracks with a pT > 500 MeV.
Changed:
<
<

png
>
>

png

 The track impact parameter variation as a function of the azimuthal angle, phi, for tracks with pT > 500 MeV. From a sinusoidal fit, we extract the center of the interaction region as X = 241 +/- 3um and Y = 844 +/- 3um.
Changed:
<
<

png
>
>

png

>
>

## Timelines

 Mean vertex X distribution for vertices reconstructed in each 2 minute interval for 6 runs between 11-13 Dec. 2009.
Changed:
<
<

png
>
>

png

 Mean vertex Y distribution for vertices reconstructed in each 2 minute interval for 6 runs between 11-13 Dec. 2009.
Changed:
<
<

png
>
>

png

 Mean vertex Z distribution for vertices reconstructed in each 2 minute interval for 6 runs between 11-13 Dec. 2009.
Changed:
<
<

png
>
>

png

 Number of vertices reconstructed in each 2 minute interval for 6 runs between 11-13 Dec. 2009.
Changed:
<
<

png
>
>

png

Line: 535 to 583

<!--/twistyPlugin-->
Deleted:
<
<

# 2009 Data at 900 GeV

<!--/twistyPlugin twikiMakeVisibleInline-->
<!--/twistyPlugin-->

<!--***********************************************************-->
<!--Do NOT remove the remaining lines, but add requested info as appropriate-->
<!--***********************************************************-->

#### Revision 22011-06-18 - RainerBartoldus

Line: 1 to 1

 META TOPICPARENT name="TriggerPublicResults"
Line: 13 to 13
Approved plots that can be shown by ATLAS speakers at conferences and similar events. Please do not add figures on your own. Contact the responsible project leader in case of questions and/or suggestions. Follow the guidelines on the trigger public results page.
Changed:
<
<

>
>

# 2011 Data

## Vertex Distributions

 Online Primary Vertex x Distribution Transverse horizontal distribution of primary vertices reconstructed online in the High Level Trigger. The distribution corresponds to 1 minute of data taking. The mean of the distribution reflects the luminous centroid position, while its width shows the uncorrected luminous size, which at this stage is still dominated by the intrinsic resolution. [png] [pdf] Online Primary Vertex y Distribution Transverse vertical distribution of primary vertices reconstructed online in the High Level Trigger. The distribution corresponds to 1 minute of data taking. The mean of the distribution reflects the luminous centroid position, while its width shows the uncorrected luminous size, which at this stage is still dominated by the intrinsic resolution. [png] [pdf] Online Primary Vertex z Distribution Longitudinal distribution of primary vertices reconstructed online in the High Level Trigger. The distribution corresponds to 1 minute of data taking. The mean of the distribution reflects the luminous centroid position, while its width shows the luminous length, which is much larger than the intrinsic resolution. [png] [pdf] Online Primary Vertex Distribution (after one minute) The transverse distribution of primary vertices reconstructed online in the High Level Trigger. The distribution corresponds to 1 minute of data taking and contains well over 100\,000 vertices. [png] [pdf] Online Primary Vertex Distribution (entire fill) The transverse distribution of primary vertices reconstructed online in the High Level Trigger. The distribution contains over 70 million vertices collected during one LHC fill. [png] [pdf] Horizontal and Vertical Luminous Tilt Angle The horizontal and vertical luminous tilt angles with respect to the ATLAS coordinate system measured online by the High Level Trigger. Transverse vertex distributions are divided into bins along the z-axis. The error bars indicate the error on the mean and are mostly too small to be visible. The slope is extracted with a linear fit versus z to measure the horizontal and vertical tilt angles. [png] [pdf] [png] [pdf]

## Track Distributions

 Luminous Centroid Position Measured with Tracks Transverse luminous centroid position measured online by the High Level Trigger using only track transverse impact parameter and azimuth angle. The transverse impact parameter d0 versus azimuth angle phi distribution measures the transverse luminous centroid position through a sinusoidal fit. The distribution corresponds to 1 minute of data taking. Point-by-point error bars are too small to be visible. This method is used as a cross-check of the vertex method and is in excellent agreement with it. [png] [pdf]

## Resolution Correction

 Displacement in x,y Between Split Vertices The displacements in x and y between each pair of separately reconstructed half vertices of a split primary vertex as a function of the number of tracks, measured online in the High Level Trigger. To measure the instrinsic vertex resolution, primary vertices are split, and the two resulting sets of tracks are fitted separately. The displacement measures the resolution of the vertex reconstruction as a function of the number of tracks per vertex, and is used to compute a correction that is applied in real time. The distributions illustrate the two competing features of this measurement: the resolution improves substantially the higher the number of tracks in the vertex, while the statistical precision is much higher for the lower track multiplicities. [png] [pdf] [png] [pdf]

 Displacement in z Between Split Vertices The displacements in z between each pair of separately reconstructed half vertices of a split primary vertex as a function of the number of tracks, measured online in the High Level Trigger. To measure the instrinsic vertex resolution, primary vertices are split, and the two resulting sets of tracks are fitted separately. The displacement measures the resolution of the vertex reconstruction as a function of the number of tracks per vertex, and is used to compute a correction that is applied in real time. The distributions illustrate the two competing features of this measurement: the resolution improves substantially the higher the number of tracks in the vertex, while the statistical precision is much higher for the lower track multiplicities. [png] [pdf] Beam Spot Transverse Resolution and Width The observed width of the primary vertex distribution, the measured resolution, and the resolution-corrected width, all as a function of the number of tracks per vertex. The observed width decreases with the track multiplicity as the resolution improves, while the corrected width stays essentially flat. The split vertex method is limited by the need for a corresponding sample of events with twice as many tracks per vertex. The method works well down to a certain multiplicity but then breaks down when the resolution becomes approximately twice the true width. The same behavior was observed for fills with larger beam sizes. [png] [pdf] [png] [pdf] Beam Spot Longitudinal Resolution and Width The width of the longitudinal primary vertex distribution along with the measured resolution as a function of the number of tracks per vertex. The z resolution has a similar dependence on the number of tracks as the resolution in the transverse plane. However, in contrast to the transverse plane, in the longitudinal direction the resolution-correction is entirely negligible. [png] [pdf]

## Time Evolutions

 Time-Variation of the Luminous Centroid Position (four days) Time-variation of the luminous centroid position in x, y, and z measured in the High Level Trigger every five minutes, for six separate LHC fills recorded over the span of four days. [png] [pdf] [png] [pdf] [png] [pdf] Time-Evolution of the Luminous Width (four days) Time-evolution of the luminous size in x, y, and z measured in the High Level Trigger every five minutes, for six separate LHC fills recorded over the span of four days. The effect of the transverse emittance blow-up is clearly visible during each fill and is on the order of 15\% on the horizontal width and 10\% on the vertical width for a 10 hour fill. Similarly, the luminous length increase from longitudinal emittance blow-up is on the order of 10\% for a 10 hour long fill. [png] [pdf] [png] [pdf] [png] [pdf]

## Bunch-by-bunch Distributions

 Luminous Centroid for Individual Bunches The luminous centroid position in x, y, and z measured in the High Level Trigger for each colliding bunch pair separately. Distinct structures are visible, in particular in the vertical position of the interaction-point, with variations of up to 5\,$\mu$m and repeating patterns across the injected bunch trains. [png] [pdf] [png] [pdf] [png] [pdf]

# 2010 Data at 7 TeV

Changed: <
<

## Online Beamspot

>
>
<!--/twistyPlugin twikiMakeVisibleInline-->

Line: 178 to 532
>
<!--/twistyPlugin-->

# 2009 Data at 900 GeV

>
<!--/twistyPlugin twikiMakeVisibleInline-->
<!--/twistyPlugin-->

<!--***********************************************************-->
<!--Do NOT remove the remaining lines, but add requested info as appropriate-->
Line: 200 to 557
<!--Once this page has been reviewed, please add the name and the date e.g. StephenHaywood - 31 Oct 2006 -->
>
 META FILEATTACHMENT attachment="Run182787_Vertexx_SiTrack.png" attr="" comment="Vertex x distribution for one LB of run 182787" date="1308420181" name="Run182787_Vertexx_SiTrack.png" path="Run182787_Vertexx_SiTrack.png" size="223999" stream="Run182787_Vertexx_SiTrack.png" tmpFilename="/usr/tmp/CGItemp13572" user="bartoldu" version="1" attachment="Run182787_Vertexx_SiTrack.pdf" attr="" comment="Vertex x distribution for one LB of run 182787" date="1308420258" name="Run182787_Vertexx_SiTrack.pdf" path="Run182787_Vertexx_SiTrack.pdf" size="15271" stream="Run182787_Vertexx_SiTrack.pdf" tmpFilename="/usr/tmp/CGItemp13585" user="bartoldu" version="1" attachment="Run182787_Vertexy_SiTrack.png" attr="" comment="Vertex y distribution for one LB of run 182787" date="1308420447" name="Run182787_Vertexy_SiTrack.png" path="Run182787_Vertexy_SiTrack.png" size="222032" stream="Run182787_Vertexy_SiTrack.png" tmpFilename="/usr/tmp/CGItemp13610" user="bartoldu" version="1" attachment="Run182787_Vertexy_SiTrack.pdf" attr="" comment="Vertex y distribution for one LB of run 182787" date="1308420471" name="Run182787_Vertexy_SiTrack.pdf" path="Run182787_Vertexy_SiTrack.pdf" size="15275" stream="Run182787_Vertexy_SiTrack.pdf" tmpFilename="/usr/tmp/CGItemp13576" user="bartoldu" version="1" attachment="Run182787_Vertexz_SiTrack.png" attr="" comment="Vertex z distribution for one LB of run 182787" date="1308420566" name="Run182787_Vertexz_SiTrack.png" path="Run182787_Vertexz_SiTrack.png" size="267926" stream="Run182787_Vertexz_SiTrack.png" tmpFilename="/usr/tmp/CGItemp13589" user="bartoldu" version="1" attachment="Run182787_Vertexz_SiTrack.pdf" attr="" comment="Vertex z distribution for one LB of run 182787" date="1308420599" name="Run182787_Vertexz_SiTrack.pdf" path="Run182787_Vertexz_SiTrack.pdf" size="16963" stream="Run182787_Vertexz_SiTrack.pdf" tmpFilename="/usr/tmp/CGItemp13561" user="bartoldu" version="1" attachment="Run182787_Vertex_XvsY_SiTrack.png" attr="" comment="Vertex x vs y distribution for one LB of run 182787" date="1308421493" name="Run182787_Vertex_XvsY_SiTrack.png" path="Run182787_Vertex_XvsY_SiTrack.png" size="474930" stream="Run182787_Vertex_XvsY_SiTrack.png" tmpFilename="/usr/tmp/CGItemp18525" user="bartoldu" version="3" attachment="Run182787_Vertex_XvsY_SiTrack.pdf" attr="" comment="Vertex x vs y distribution for run 182787" date="1308421619" name="Run182787_Vertex_XvsY_SiTrack.pdf" path="Run182787_Vertex_XvsY_SiTrack.pdf" size="36329" stream="Run182787_Vertex_XvsY_SiTrack.pdf" tmpFilename="/usr/tmp/CGItemp18498" user="bartoldu" version="2" attachment="Run182787_Vertex_XvsY_SiTrack_EOR.png" attr="" comment="Vertex x vs y distribution for run 182787" date="1308421584" name="Run182787_Vertex_XvsY_SiTrack_EOR.png" path="Run182787_Vertex_XvsY_SiTrack_EOR.png" size="842670" stream="Run182787_Vertex_XvsY_SiTrack_EOR.png" tmpFilename="/usr/tmp/CGItemp18532" user="bartoldu" version="1" attachment="Run182787_Vertex_XvsY_SiTrack_EOR.pdf" attr="" comment="Vertex x vs y distribution for run 182787" date="1308422457" name="Run182787_Vertex_XvsY_SiTrack_EOR.pdf" path="Run182787_Vertex_XvsY_SiTrack_EOR.pdf" size="36329" stream="Run182787_Vertex_XvsY_SiTrack_EOR.pdf" tmpFilename="/usr/tmp/CGItemp18476" user="bartoldu" version="1" attachment="Run182787_TrackD0Phi_SiTrack.png" attr="" comment="Track d0 vs phi distribution for one LB of run 182787" date="1308422934" name="Run182787_TrackD0Phi_SiTrack.png" path="Run182787_TrackD0Phi_SiTrack.png" size="240882" stream="Run182787_TrackD0Phi_SiTrack.png" tmpFilename="/usr/tmp/CGItemp18523" user="bartoldu" version="1" attachment="Run182787_TrackD0Phi_SiTrack.pdf" attr="" comment="Track d0 vs phi distribution for one LB of run 182787" date="1308422955" name="Run182787_TrackD0Phi_SiTrack.pdf" path="Run182787_TrackD0Phi_SiTrack.pdf" size="16889" stream="Run182787_TrackD0Phi_SiTrack.pdf" tmpFilename="/usr/tmp/CGItemp18460" user="bartoldu" version="1" attachment="Run182787_Tiltx_SiTrack.png" attr="" comment="Luminous xz tilt for run 182787" date="1308423385" name="Run182787_Tiltx_SiTrack.png" path="Run182787_Tiltx_SiTrack.png" size="204584" stream="Run182787_Tiltx_SiTrack.png" tmpFilename="/usr/tmp/CGItemp18469" user="bartoldu" version="2" attachment="Run182787_Tiltx_SiTrack.pdf" attr="" comment="Luminous xz tilt for run 182787" date="1308423403" name="Run182787_Tiltx_SiTrack.pdf" path="Run182787_Tiltx_SiTrack.pdf" size="16468" stream="Run182787_Tiltx_SiTrack.pdf" tmpFilename="/usr/tmp/CGItemp18537" user="bartoldu" version="2" attachment="Run182787_Tilty_SiTrack.png" attr="" comment="Luminous yz tilt for run 182787" date="1308423430" name="Run182787_Tilty_SiTrack.png" path="Run182787_Tilty_SiTrack.png" size="221382" stream="Run182787_Tilty_SiTrack.png" tmpFilename="/usr/tmp/CGItemp18477" user="bartoldu" version="2" attachment="Run182787_Tilty_SiTrack.pdf" attr="" comment="Luminous yz tilt for run 182787" date="1308423451" name="Run182787_Tilty_SiTrack.pdf" path="Run182787_Tilty_SiTrack.pdf" size="16563" stream="Run182787_Tilty_SiTrack.pdf" tmpFilename="/usr/tmp/CGItemp18441" user="bartoldu" version="2" attachment="Run182787_Vertex_SplitDeltax_SiTrack.png" attr="" comment="Split vertex displacement x vs number of tracks for run 182787" date="1308423962" name="Run182787_Vertex_SplitDeltax_SiTrack.png" path="Run182787_Vertex_SplitDeltax_SiTrack.png" size="1814823" stream="Run182787_Vertex_SplitDeltax_SiTrack.png" tmpFilename="/usr/tmp/CGItemp18535" user="bartoldu" version="1" attachment="Run182787_Vertex_SplitDeltax_SiTrack.pdf" attr="" comment="Split vertex displacement x vs number of tracks for run 182787" date="1308423984" name="Run182787_Vertex_SplitDeltax_SiTrack.pdf" path="Run182787_Vertex_SplitDeltax_SiTrack.pdf" size="99777" stream="Run182787_Vertex_SplitDeltax_SiTrack.pdf" tmpFilename="/usr/tmp/CGItemp18470" user="bartoldu" version="1" attachment="Run182787_Vertex_SplitDeltay_SiTrack.png" attr="" comment="Split vertex displacement y vs number of tracks for run 182787" date="1308424118" name="Run182787_Vertex_SplitDeltay_SiTrack.png" path="Run182787_Vertex_SplitDeltay_SiTrack.png" size="1780254" stream="Run182787_Vertex_SplitDeltay_SiTrack.png" tmpFilename="/usr/tmp/CGItemp18424" user="bartoldu" version="1" attachment="Run182787_Vertex_SplitDeltay_SiTrack.pdf" attr="" comment="Split vertex displacement y vs number of tracks for run 182787" date="1308424142" name="Run182787_Vertex_SplitDeltay_SiTrack.pdf" path="Run182787_Vertex_SplitDeltay_SiTrack.pdf" size="97801" stream="Run182787_Vertex_SplitDeltay_SiTrack.pdf" tmpFilename="/usr/tmp/CGItemp18344" user="bartoldu" version="1" attachment="Run182787_Vertex_SplitDeltaz_SiTrack.png" attr="" comment="Split vertex displacement z vs number of tracks for run 182787" date="1308424238" name="Run182787_Vertex_SplitDeltaz_SiTrack.png" path="Run182787_Vertex_SplitDeltaz_SiTrack.png" size="1838372" stream="Run182787_Vertex_SplitDeltaz_SiTrack.png" tmpFilename="/usr/tmp/CGItemp18566" user="bartoldu" version="1" attachment="Run182787_Vertex_SplitDeltaz_SiTrack.pdf" attr="" comment="Split vertex displacement z vs number of tracks for run 182787" date="1308424258" name="Run182787_Vertex_SplitDeltaz_SiTrack.pdf" path="Run182787_Vertex_SplitDeltaz_SiTrack.pdf" size="98005" stream="Run182787_Vertex_SplitDeltaz_SiTrack.pdf" tmpFilename="/usr/tmp/CGItemp18561" user="bartoldu" version="1" attachment="Run182787_X_Resolution_and_Width.png" attr="" comment="Beamspot x,y resolution and width for run 182787" date="1308426624" name="Run182787_X_Resolution_and_Width.png" path="Run182787_X_Resolution_and_Width.png" size="239558" stream="Run182787_X_Resolution_and_Width.png" tmpFilename="/usr/tmp/CGItemp18404" user="bartoldu" version="1" attachment="Run182787_X_Resolution_and_Width.pdf" attr="" comment="Beamspot x,y resolution and width for run 182787" date="1308426640" name="Run182787_X_Resolution_and_Width.pdf" path="Run182787_X_Resolution_and_Width.pdf" size="19551" stream="Run182787_X_Resolution_and_Width.pdf" tmpFilename="/usr/tmp/CGItemp18425" user="bartoldu" version="1" attachment="Run182787_Y_Resolution_and_Width.png" attr="" comment="Beamspot x,y resolution and width for run 182787" date="1308426686" name="Run182787_Y_Resolution_and_Width.png" path="Run182787_Y_Resolution_and_Width.png" size="238017" stream="Run182787_Y_Resolution_and_Width.png" tmpFilename="/usr/tmp/CGItemp18570" user="bartoldu" version="1" attachment="Run182787_Y_Resolution_and_Width.pdf" attr="" comment="Beamspot x,y resolution and width for run 182787" date="1308426705" name="Run182787_Y_Resolution_and_Width.pdf" path="Run182787_Y_Resolution_and_Width.pdf" size="19493" stream="Run182787_Y_Resolution_and_Width.pdf" tmpFilename="/usr/tmp/CGItemp18425" user="bartoldu" version="1" attachment="Run182787_Z_Resolution_and_Width.png" attr="" comment="Beamspot z resolution and width for run 182787" date="1308426885" name="Run182787_Z_Resolution_and_Width.png" path="Run182787_Z_Resolution_and_Width.png" size="222199" stream="Run182787_Z_Resolution_and_Width.png" tmpFilename="/usr/tmp/CGItemp18533" user="bartoldu" version="1" attachment="Run182787_Z_Resolution_and_Width.pdf" attr="" comment="Beamspot z resolution and width for run 182787" date="1308426927" name="Run182787_Z_Resolution_and_Width.pdf" path="Run182787_Z_Resolution_and_Width.pdf" size="19551" stream="Run182787_Z_Resolution_and_Width.pdf" tmpFilename="/usr/tmp/CGItemp18416" user="bartoldu" version="1" attachment="utc_vs_posX_pm_posXErr.png" attr="" comment="Time evolution of x centroid position for runs 182747 to 182886" date="1308427414" name="utc_vs_posX_pm_posXErr.png" path="utc_vs_posX_pm_posXErr.png" size="118319" stream="utc_vs_posX_pm_posXErr.png" tmpFilename="/usr/tmp/CGItemp18419" user="bartoldu" version="1" attachment="utc_vs_posX_pm_posXErr.pdf" attr="" comment="Time evolution of x centroid position for runs 182747 to 182886" date="1308427435" name="utc_vs_posX_pm_posXErr.pdf" path="utc_vs_posX_pm_posXErr.pdf" size="32748" stream="utc_vs_posX_pm_posXErr.pdf" tmpFilename="/usr/tmp/CGItemp18369" user="bartoldu" version="1" attachment="utc_vs_posY_pm_posYErr.png" attr="" comment="Time evolution of y centroid position for runs 182747 to 182886" date="1308427458" name="utc_vs_posY_pm_posYErr.png" path="utc_vs_posY_pm_posYErr.png" size="120689" stream="utc_vs_posY_pm_posYErr.png" tmpFilename="/usr/tmp/CGItemp18457" user="bartoldu" version="1" attachment="utc_vs_posY_pm_posYErr.pdf" attr="" comment="Time evolution of y centroid position for runs 182747 to 182886" date="1308427482" name="utc_vs_posY_pm_posYErr.pdf" path="utc_vs_posY_pm_posYErr.pdf" size="32857" stream="utc_vs_posY_pm_posYErr.pdf" tmpFilename="/usr/tmp/CGItemp18490" user="bartoldu" version="1" attachment="utc_vs_posZ_pm_posZErr.png" attr="" comment="Time evolution of z centroid position for runs 182747 to 182886" date="1308427528" name="utc_vs_posZ_pm_posZErr.png" path="utc_vs_posZ_pm_posZErr.png" size="128152" stream="utc_vs_posZ_pm_posZErr.png" tmpFilename="/usr/tmp/CGItemp18508" user="bartoldu" version="1" attachment="utc_vs_posZ_pm_posZErr.pdf" attr="" comment="Time evolution of z centroid position for runs 182747 to 182886" date="1308427572" name="utc_vs_posZ_pm_posZErr.pdf" path="utc_vs_posZ_pm_posZErr.pdf" size="33567" stream="utc_vs_posZ_pm_posZErr.pdf" tmpFilename="/usr/tmp/CGItemp18356" user="bartoldu" version="1" attachment="utc_vs_sigmaX_pm_sigmaXErr.png" attr="" comment="Time evolution of luminous x width for runs 182747 to 182886" date="1308427939" name="utc_vs_sigmaX_pm_sigmaXErr.png" path="utc_vs_sigmaX_pm_sigmaXErr.png" size="147584" stream="utc_vs_sigmaX_pm_sigmaXErr.png" tmpFilename="/usr/tmp/CGItemp18463" user="bartoldu" version="1" attachment="utc_vs_sigmaX_pm_sigmaXErr.pdf" attr="" comment="Time evolution of luminous x width for runs 182747 to 182886" date="1308427964" name="utc_vs_sigmaX_pm_sigmaXErr.pdf" path="utc_vs_sigmaX_pm_sigmaXErr.pdf" size="33499" stream="utc_vs_sigmaX_pm_sigmaXErr.pdf" tmpFilename="/usr/tmp/CGItemp18453" user="bartoldu" version="1" attachment="utc_vs_sigmaY_pm_sigmaYErr.png" attr="" comment="Time evolution of luminous y width for runs 182747 to 182886" date="1308429154" name="utc_vs_sigmaY_pm_sigmaYErr.png" path="utc_vs_sigmaY_pm_sigmaYErr.png" size="139737" stream="utc_vs_sigmaY_pm_sigmaYErr.png" tmpFilename="/usr/tmp/CGItemp18477" user="bartoldu" version="3" attachment="utc_vs_sigmaY_pm_sigmaYErr.pdf" attr="" comment="Time evolution of luminous y width for runs 182747 to 182886" date="1308429194" name="utc_vs_sigmaY_pm_sigmaYErr.pdf" path="utc_vs_sigmaY_pm_sigmaYErr.pdf" size="33505" stream="utc_vs_sigmaY_pm_sigmaYErr.pdf" tmpFilename="/usr/tmp/CGItemp18502" user="bartoldu" version="3" attachment="utc_vs_sigmaZ_pm_sigmaZErr.png" attr="" comment="Time evolution of luminous length for runs 182747 to 182886" date="1308429218" name="utc_vs_sigmaZ_pm_sigmaZErr.png" path="utc_vs_sigmaZ_pm_sigmaZErr.png" size="127352" stream="utc_vs_sigmaZ_pm_sigmaZErr.png" tmpFilename="/usr/tmp/CGItemp18497" user="bartoldu" version="3" attachment="utc_vs_sigmaZ_pm_sigmaZErr.pdf" attr="" comment="Time evolution of luminous length for runs 182747 to 182886" date="1308429246" name="utc_vs_sigmaZ_pm_sigmaZErr.pdf" path="utc_vs_sigmaZ_pm_sigmaZErr.pdf" size="33405" stream="utc_vs_sigmaZ_pm_sigmaZErr.pdf" tmpFilename="/usr/tmp/CGItemp18353" user="bartoldu" version="3" attachment="bcid_vs_posX_pm_posXErr.png" attr="" comment="Luminous centroid x for individual bunches of run 182787" date="1308428345" name="bcid_vs_posX_pm_posXErr.png" path="bcid_vs_posX_pm_posXErr.png" size="174640" stream="bcid_vs_posX_pm_posXErr.png" tmpFilename="/usr/tmp/CGItemp18418" user="bartoldu" version="1" attachment="bcid_vs_posX_pm_posXErr.pdf" attr="" comment="Luminous centroid x for individual bunches of run 182787" date="1308428373" name="bcid_vs_posX_pm_posXErr.pdf" path="bcid_vs_posX_pm_posXErr.pdf" size="72951" stream="bcid_vs_posX_pm_posXErr.pdf" tmpFilename="/usr/tmp/CGItemp18481" user="bartoldu" version="1" attachment="bcid_vs_posY_pm_posYErr.png" attr="" comment="Luminous centroid y for individual bunches of run 182787" date="1308428411" name="bcid_vs_posY_pm_posYErr.png" path="bcid_vs_posY_pm_posYErr.png" size="214551" stream="bcid_vs_posY_pm_posYErr.png" tmpFilename="/usr/tmp/CGItemp18449" user="bartoldu" version="1" attachment="bcid_vs_posY_pm_posYErr.pdf" attr="" comment="Luminous centroid y for individual bunches of run 182787" date="1308428432" name="bcid_vs_posY_pm_posYErr.pdf" path="bcid_vs_posY_pm_posYErr.pdf" size="73389" stream="bcid_vs_posY_pm_posYErr.pdf" tmpFilename="/usr/tmp/CGItemp18460" user="bartoldu" version="1" attachment="bcid_vs_posZ_pm_posZErr.png" attr="" comment="Luminous centroid z for individual bunches of run 182787" date="1308428473" name="bcid_vs_posZ_pm_posZErr.png" path="bcid_vs_posZ_pm_posZErr.png" size="222412" stream="bcid_vs_posZ_pm_posZErr.png" tmpFilename="/usr/tmp/CGItemp18473" user="bartoldu" version="1" attachment="bcid_vs_posZ_pm_posZErr.pdf" attr="" comment="Luminous centroid z for individual bunches of run 182787" date="1308428528" name="bcid_vs_posZ_pm_posZErr.pdf" path="bcid_vs_posZ_pm_posZErr.pdf" size="73438" stream="bcid_vs_posZ_pm_posZErr.pdf" tmpFilename="/usr/tmp/CGItemp18483" user="bartoldu" version="1"

#### Revision 12011-06-13 - RainerBartoldus

Line: 1 to 1
>
>
 META TOPICPARENT name="TriggerPublicResults"

# Online Beam Spot Public Results

<!--optional-->

# Introduction

<!-- Add an introduction here, describing the purpose of this topic. -->

Approved plots that can be shown by ATLAS speakers at conferences and similar events. Please do not add figures on your own. Contact the responsible project leader in case of questions and/or suggestions. Follow the guidelines on the trigger public results page.

# 2010 Data at 7 TeV

## Online Beamspot

 Horizontal luminous centroid (horizontal "beam spot" position) Online luminous region measurements at $\sqrt{s}=7$~TeV. These measurements were available online in real time as soon as the high-level trigger was activated for the first high energy collisions at the LHC. Gaussian fits (within $\pm1\times RMS$ for $x$,$y$) are used to extract the luminous region mean position and width, where the latter is dominated by the vertexing resolution. An excellent agreement is observed using different tracking algorithms online and with respect to the more sophisticated offline beam spot measurement. [png] [eps] Vertical luminous centroid (vertical "beam spot" position) Online luminous region measurements at $\sqrt{s}=7$~TeV. These measurements were available online in real time as soon as the high-level trigger was activated for the first high energy collisions at the LHC. Gaussian fits (within $\pm1\times RMS$ for $x$,$y$) are used to extract the luminous region mean position and width, where the latter is dominated by the vertexing resolution. An excellent agreement is observed using different tracking algorithms online and with respect to the more sophisticated offline beam spot measurement. png eps Longitudinal luminous centroid (longitudinal "beam spot" position) Online luminous region measurements at $\sqrt{s}=7$~TeV. These measurements were available online in real time as soon as the high-level trigger was activated for the first high energy collisions at the LHC. Gaussian fits (within $\pm1\times RMS$ for $x$,$y$) are used to extract the luminous region mean position and width, where the latter is dominated by the vertexing resolution. An excellent agreement is observed using different tracking algorithms online and with respect to the more sophisticated offline beam spot measurement. [png] [eps] Luminous centroid ("beam spot") position measured with tracks Luminous centroid ("beam spot") position measured online using only level two tracking at $\sqrt{s}=7$ TeV. The transverse impact parameter ($d_{0}$) versus $\phi$ measures the transverse luminous centroid ("beam spot") position using a sinusoidal fit of $d_{0}$ as a function of $\phi$. The track-based result agrees to within 8 $\mu$m in $x$ and within 3 $\mu$m in $y$ with the positions measured via vertex fitting on an event-by-event basis. Point-by-point error bars are too small to be visible. [png] [eps] Horizontal luminous tilt angle The horizontal and vertical luminous tilt angles with respect to the ATLAS coordinate system are measured online at $\sqrt{s}=7$ TeV. Vertices are binned in two dimensions along $z$ and a Gaussian fit along the transverse direction is used to extract the mean position. The errors indicate the error on this mean. The slope is measured with a linear fit versus $z$ to extract the horizontal and vertical tilt angles, and in both cases agrees with the offline result to within 70 $\mu$rad. [png] [eps] Vertical luminous tilt angle The horizontal and vertical luminous tilt angles with respect to the ATLAS coordinate system are measured online at $\sqrt{s}=7$ TeV. Vertices are binned in two dimensions along $z$ and a Gaussian fit along the transverse direction is used to extract the mean position. The errors indicate the error on this mean. The slope is measured with a linear fit versus $z$ to extract the horizontal and vertical tilt angles, and in both cases agrees with the offline result to within 70 $\mu$rad. [png] [eps] Relative luminosity from HLT vertex counting Relative luminosity measurement measured via vertex counting and compared to the Liquid-Argon (LAr) calorimeter measurement for run 142193 (LHC fill number 911). The profile measured online using vertices follows the observed decay from the LAr with a very high precision after normalization to the LAr measurement. The nearly identical shape indicates that the level of background is likely to be small for the vertex counting method, or at least nearly constant with respect to time and luminosity. [png] [eps] Vertex X distribution per colliding bunch (BCID) for run 142383 The monitored luminous region position (X,Y,Z) and relative luminosity per bunch ($N_{\rm vertex}$) are monitored as a function of the fill pattern of the LHC. These quantities are available online for every luminosity block and provide information relevant to the both the trigger and the data quality, as well as the machine conditions. [png] [eps] Vertex Y distribution per colliding bunch (BCID) for run 142383 The monitored luminous region position (X,Y,Z) and relative luminosity per bunch ($N_{\rm vertex}$) are monitored as a function of the fill pattern of the LHC. These quantities are available online for every luminosity block and provide information relevant to the both the trigger and the data quality, as well as the machine conditions. [png] [eps] Vertex Z distribution per colliding bunch (BCID) for run 142383 The monitored luminous region position (X,Y,Z) and relative luminosity per bunch ($N_{\rm vertex}$) are monitored as a function of the fill pattern of the LHC. These quantities are available online for every luminosity block and provide information relevant to the both the trigger and the data quality, as well as the machine conditions. [png] [eps] Average vertex multiplicity per event and per colliding bunch (BCID) for run 142383 The monitored luminous region position (X,Y,Z) and relative luminosity per bunch ($N_{\rm vertex}$) are monitored as a function of the fill pattern of the LHC. These quantities are available online for every luminosity block and provide information relevant to the both the trigger and the data quality, as well as the machine conditions. [png] [eps] Vertex X distribution for run 141811 This distribution represents the transverse distribution in X of vertices reconstructed by the LVL2 trigger (online) Atlas.BeamSpot algorithm in run141811. This is the first run for which the HLT was active (in passthrough mode) and the silicon detectors were at their fully operational bias voltages. We measure a horizontal position of X = 160.7 +/- 6um with an observed width of 240um for the core of the distribution. png eps Vertex Y distribution for run 141811 This distribution represents the transverse distribution in Y of vertices reconstructed by the LVL2 trigger (online) Atlas.BeamSpot algorithm in run141811.This is the first run for which the HLT was active (in passthrough mode) and the silicon detectors were at their fully operational bias voltages. We measure a vertical position of Y = 955 +/- 7um with an observed width of 280um for the core of the distribution. png eps Vertex Z distribution for run 141811 (BCID = 1, 2674) This plot represents the longitudinal distribution of vertices reconstructed by the LVL2 trigger (online) Atlas.BeamSpot algorithms for run 141811. Thiswas the very first run for which the HLT was active (in passthrough mode) and the Silcon detectors (Pixel and SCT) were at their fully operational bias voltages. We have separated the distribution into the two bunch crossing identifiers (BCID) for the two pairs of colliding bunches in the LHC machine. We can see that BCID = 2674 has a higher intensity than BCID = 1 due to the 50% larger number of vertices reconstructed. The mean longitudinal positions and extent are compatible within errors. png eps Track transverse impact parameter vs. phi distribution for run 141811 This distribution represents the track impact parameter variation as a function of the azimuthal angle, phi, of the track. Tracks used here arerequired to have a transverse momentum greater than 500 MeV. The sinusoidal variation is indicative of an underlying interaction point offset with respect to the center of the nominal ATLAS coordinate system, or (0,0,0). By fitting a sinusoidal function with two components, we can immediately extract the position of the interaction point in the transverse plane. We measure this position to be X = 163.6 +/- 8um and Y = 904.1 +/- 9um, which is in good agreement with the vertex-based measurement. png eps The transverse distribution in X of vertices reconstructed by the online beam spot algorithm in run 142913. We measure the average horizontal position as X = 253 +/- 2um with an observed width of 278um including resolution. png The transverse distribution in Y of vertices reconstructed by the online beam spot algorithm in run 142913. We measure the average vertical position as Y = 877 +/- 2um with an observed width of 345um including resolution. png The longitudinal distribution of vertices reconstructed by the online beam spot algorithm for run 142193. We measure an average position of Z = -7.99 +/- 0.24 mm with an observed width of 41 mm including resolution. png The distribution of primary vertices in the transverse plane reconstructed by the online beam spot algorithm for run 142193. Vertices are fitted from 2 or more tracks with a pT > 500 MeV. png The track impact parameter variation as a function of the azimuthal angle, phi, for tracks with pT > 500 MeV. From a sinusoidal fit, we extract the center of the interaction region as X = 241 +/- 3um and Y = 844 +/- 3um. png Mean vertex X distribution for vertices reconstructed in each 2 minute interval for 6 runs between 11-13 Dec. 2009. png Mean vertex Y distribution for vertices reconstructed in each 2 minute interval for 6 runs between 11-13 Dec. 2009. png Mean vertex Z distribution for vertices reconstructed in each 2 minute interval for 6 runs between 11-13 Dec. 2009. png Number of vertices reconstructed in each 2 minute interval for 6 runs between 11-13 Dec. 2009. png

# 2009 Data at 900 GeV

<!--***********************************************************-->
<!--Do NOT remove the remaining lines, but add requested info as appropriate-->
<!--***********************************************************-->

<!--For significant updates to the topic, consider adding your 'signature' (beneath this editing box)-->
<!--Person responsible for the page:
Or replace the complete REVINFO tag (including percentages symbols) with a name in the form TwikiUsersName-->
<!--Once this page has been reviewed, please add the name and the date e.g. StephenHaywood - 31 Oct 2006 -->