GiangiobbeVincentSandbox < Sandbox

   ----+ Testbeam 2015 Analysis page

%TOC%
 
---++ Description of the data

---+++ Beamline
---+++ Runs
The list of runs can be found in the [[https://pcata007.cern.ch/tileinfo/runinfo.php][ATLAS Tile Run Information Database]].
To get the list of runs that have been taken during this testbeam, request =tb='Oct-2015'= and =type='Phys'= (list of physics runs). The database gives you the following information for each run :
| =run= | run number from 510008 to 510853 |
| =energy= | beam energy : 50, 150, 180 !GeV |
| =beam= | type of beam : =mu=, =e=, =pi= for muons, electrons, pions respectively |
| =events= | number of events in the run. We usually consider only runs with more than 5000 events. |
| =module= | =='M0'= for module 0, ='EB'= for extended barrel  |
| =eta= | Value of pseudo-rapidity at which the beam enters in the module. It is filled only for projective runs |
| =theta= | Incidence of the beam with respect to the front face of !TileCal : 20°, 90°, -90° |
| =cell= | For runs at theta=20°, this is the name of the cell in which the beam is entering A1 to A10 in module 0, A12 to D4 in Extended Barrel. For runs at theta=90°, this is the tile row number from 1 to 11.   |
| =z= | For runs at theta=90°, it is the encoded position of the table with respect to the beam. z=18070744 is the edge of tile 11, z=18081250 is the edge of tile 1. |

A list of runs for physics analysis is available [[%ATTACHURL%/ListOfRuns.pdf][here]].

You have also the possibility to generate your own list of runs accessing the !TileCal Info database from lxplus. Ex :
<verbatim> /usr/bin/mysql -h pcata007.cern.ch tile -e 'select run, events, beam, energy, module,theta,cell,eta,z from runinfo where tb="Oct-2015" and events>2000’ </verbatim>

 
---+++ Testbeam ntuple
The ntuples can be found at : =root://eosatlas//eos/atlas/atlascerngroupdisk/det-tile/testbeam/2015/tiletb_= _run number_ =.root=

The ntuples from the demonstrator can be found at : =root://eosatlas///eos/atlas/atlascerngroupdisk/det-tile/demonstrator/2015/rawData/Data_=_time stamp_=_testbeam_=_run number_=_.root=

---+++ Ntuple variables

---++++ Beamline scintillators

| *Variable name* | *Description* | *Suggested cut* |
| =S1cou= | signal in S1 scintillator, in adc | =1000<S1<2500= adc |
| =S2cou= | signal in S2 scintillator, in adc | =500<S2<1500= adc |
| =S3cou= | signal in S3 scintillator, in adc | |

---++++ Cherenkov counters
Cherenkov counters 1 and 2 provide a useful information for particle identification. They can be used at low energy (50 !GeV) where the gas pressure in are such that electrons and muons give a cherenkov signal, while protons and kaons give a pedestal.

WARNING : check the distribution of the signal in the cherenkov counters before applying a cut : the values might change after run 510374.   
| =Cher1= | signal in the first Cherenkov counter (in adc) | =Cher1<300= : pedestal, =Cher1>300= : signal |
| =Cher2= | signal in the second Cherenkov counter (in adc) | =Cher2<350= : pedestal, =Cher2>350= : signal |

---++++ Beam chambers
Beam chambers 1 and 2 give the coordinate at which a particle passed. X and Y are the horizontal and vertical axis respectively (X=0;Y=0 approximately corresponds to the geometric centre of the beam spot).
 
| *Variable name* | *Description* |
| =btdc1[8]= | Time (in adc) between the gate and the arrival of the first hit in the BCs. [0-3] : BC1 left,right,up,down; [4-7] : BC2 left,right,up,down |
| =Xcha1= | X position in BC1 (in mm) |
| =Ycha1= | Y position in BC1 (in mm) |
| =Xcha2= | X position in BC2 (in mm) |
| =Ycha2= | Y position in BC2 (in mm) |
| =Ximp= | Extrapolated X-position of the beam at the level of the !TileCal table. |
| =Yimp= | Extrapolated Y-position of the beam at the level of the !TileCal table. |

| *Suggested cut* |
| Limit the extension of the beam to a spot of radius R : =sqrt(Ximp*Ximp + Yimp*Yimp)<R= |
| Remove particles that are not parallel to the beam axis : =Xcha1-Xcha2<Cut=, =Ycha1-Ycha2<Cut= |

In addition, you might want to check and reject events with multi hits in the beam chambers. The distributions of =btdc1[0]+btdc1[1]=, =btdc1[2]+btdc1[3]= (BC1) and =btdc1[4]+btdc1[5]=, =btdc1[6]+btdc1[7]= (BC2) should show a narrow peak at a given value. Events far away from this peak correspond to multi-hits in the chamber and should be rejected.


---++++ !TileCal variables 
*WARNING : the index from 0 to 47 corresponds to the pmt number -1* : see [[http://zenis.dnp.fmph.uniba.sk/tile.html][TileCal mapping]].
| *Variable name for module 0 (M0) and Extended Barrel (EB)* | *Description* |
| =EoptC01[48]=, =EoptE02[48]= | Energy in femto Coulomb (fC) reconstructed by optimal filter.  |
| =ToptC01[48]=, =ToptE02[48]= | Timing in ns reconstructed by optimal filter.  |
| =GainC01[48]=, =GainE02[48]= | 0=low gain, 1=high gain. |
| =SampleC01[48][7]=, =SampleE02[48][7]= | Signal in adc for the 7 timing samples, for each pmt.  |
| =PedoptC01[48]=, =PedoptE02[48]= | Pedestal (in adc) obtained by optimal filter.  |
| =Chi2optC01[48]=, =Chi2optE02[48]= | Chi2 of the fit.  |


---++ Analysis

---+++ 90° muons in each Tile row
180 !GeV muon runs have been taken at +/-90°, in each of the 11 tile rows of Module 0 and Extended barrel. The goal of the 90° muon analysis is to compute the energy loss in the scintillators (dE/dx) for each !TileCal cell. The dE/dx is measured in each cell, by dividing the response to muons in the cell by the number of scintillators in the corresponding tile row. Ideally (ie if the cells response have been inter-calibrated by Cs scan), dE/dx should be the same in each cell. If not, an inter-calibration factor has to be applied.

*Persons in charge of the analysis* :

[[mailto:tamar.zakareishvili@cern.ch][Tamar Zakareishvili]] (for Module 0)
[[mailto:stowey@uchicago.edu][Shannon Towey]] (for Extended Barrel)

*Help* : analysis from previous test-beams
[[http://cds.cern.ch/record/730564/files/tilecal-2004-007.pdf][ATL-TILECAL-2004-007]]


Tile rows in Module 0 and in EB, number of tiles (periods) per cell (see [[https://www.google.ch/url?sa=t&rct=j&q=&esrc=s&source=web&cd=7&ved=0CFEQFjAGahUKEwiKs4vV9vbIAhVD0A4KHfFoBC8&url=http%3A%2F%2Fwww.iaea.org%2Finis%2Fcollection%2FNCLCollectionStore%2F_Public%2F43%2F035%2F43035360.pdf&usg=AFQjCNFuairC1mtSCok8IBkcKvNoO2D0SA&cad=rja][here]] for more details).
<img src="%ATTACHURLPATH%/Capture_decran_2015-11-04_15.13.56.png" alt="Capture_decran_2015-11-04_15.13.56.png" width="414" height="171" />
<img src="%ATTACHURLPATH%/Capture_decran_2015-11-04_15.03.50.png" alt="Capture_decran_2015-11-04_15.03.50.png" width="408" height="144" />
<img src="%ATTACHURLPATH%/Capture_decran_2015-11-04_15.03.43.png" alt="Capture_decran_2015-11-04_15.03.43.png" width="401" height="230" />

---+++ 90° muons, z-scan in Extended Barrel
The goal of this analysis is to evaluate the difference of response with respect to the position of the beam in the tiles. A scan in the longitudinal axis (axis crossing the two holes) has been performed with muons (runs 510644 to 510727) and electrons (runs 510579 to 510643).

*Persons in charge of the analysis* :
[[mailto:lasha.pantskhava@cern.ch][Lasha Pantskhava]]

*Help* : Size of each tile 

<img src="%ATTACHURLPATH%/Capture_decran_2015-11-04_14.38.43.png" alt="Capture_decran_2015-11-04_14.38.43.png" width="174" height="178" />
<img src="%ATTACHURLPATH%/Capture_decran_2015-11-04_14.38.34.png" alt="Capture_decran_2015-11-04_14.38.34.png" width="361" height="195" />

 
---+++ Comparison between 90° muons and projective muons 
*Persons in charge of the analysis* :


---+++ 20° electrons
*Persons in charge of the analysis* :

*Help/documentation* :

[[http://cds.cern.ch/record/799443/files/tilecal-2004-013.pdf][ATL-TILECAL-2004-013]], [[http://cds.cern.ch/record/833664][ATL-TILECAL-PUB-2005-005]]

Attachments

Topic attachments
I	Attachment	History	Action	Size	Date	Who	Comment
png	Capture_decran_2015-11-04_14.38.34.png	r1	manage	53.9 K	2015-11-04 - 14:40	GiangiobbeVincent
png	Capture_decran_2015-11-04_14.38.43.png	r1	manage	18.1 K	2015-11-04 - 14:40	GiangiobbeVincent
png	Capture_decran_2015-11-04_15.03.43.png	r1	manage	41.3 K	2015-11-04 - 15:14	GiangiobbeVincent
png	Capture_decran_2015-11-04_15.03.50.png	r1	manage	28.0 K	2015-11-04 - 15:14	GiangiobbeVincent
png	Capture_decran_2015-11-04_15.13.56.png	r1	manage	25.7 K	2015-11-04 - 15:14	GiangiobbeVincent
pdf	ListOfRuns.pdf	r1	manage	46.1 K	2015-11-04 - 09:54	GiangiobbeVincent	List of physics runs
gif	ResultModule_64.gif	r1	manage	20.3 K	2013-01-23 - 16:22	GiangiobbeVincent

Topic revision: r8 - 2015-11-23 - JaredDavidLittle

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