LArCaloPublicResultsLS2

Introduction
Digital Trigger performance plots
Main readout comparison plots.

Introduction

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 LAr project leader in case of questions and/or suggestions.

The plots here presents the results obtained during the LHC LS2 and during the commissioning of the LAr Digital Trigger system.

Digital Trigger performance plots

Measured baseline shift as a function of Bunch Crossing IDentifier (BCID) of a supercell located in the front layer of ATLAS Liquid Argon (LAr) Electromagnetic calorimeter at η=1.4 with LAr Phase-I demonstrator which covers a region of 0<η<1.5, 1.8<φ<2.0. Data taken in 21st. Oct. 2018 with a pre-scaled random trigger for an entire LHC fill, which instantaneous luminosity range from $17.1\times10^{33}cm^{-2}s^{-1}$ to $8.67\times10^{33}cm^{-2}s^{-1}$ in stable beam condition. Each point is averaged of about 500 ADC samples recorded in 10 consecutive minutes while instantaneous luminosity is smoothly decreasing. Maximum (minimum) baseline shifts is observed 0.7 (-0.5) ADC counts at the highest instantaneous luminosity. Only subset of 300 BCIDs out of 3564 BCIDs are displayed. Blue and red lines indicate beginning and end of a LHC train structure, respectively. Amplitude of measured baseline shift has a good linearity with the instantaneous luminosity.	eps version, pdf version
Measured pulse shape of a super cell from the newly installed ATLAS Liquid Argon (LAr) Phase-I digital trigger readout board in the barrel A-side of the ATLAS LAr Electromagnetic calorimeter. The digital trigger readout board which covers a region of 0 < η< 1.52, -1.78 < φ < -1.39, was installed in the end of October 2019. This pulse is generated by injecting a predetermined amount of charge (DAC=4400, corresponding to a transverse energy of 487 GeV) into the electrode of the calorimeter from the calibration board in the front end crate. The analog pulse is digitized and displayed at 40 MHz by a custom ADC chip. The sampling phase relative to the pulse is determined by a stepped delay with interval of 1.04 ns selected on the calibration board.	eps version, pdf version
Measured amplitude of calibration pulse (in transverse energy) as a function of injected amount of charge, using a newly installed ATLAS Liquid Argon (LAr) Phase-I digital trigger readout board in the barrel A-side of the ATLAS LAr Electromagnetic calorimeter. The digital trigger readout board which covers a region of 0 < η< 1.52, -1.78 < φ< -1.39 was installed in the end of October 2019. The injected amount of charge is generated by a DAC at the calibration board in the front end system, and the DAC setting is converted into a transverse energy based on test beam results. The amplitude of the pulse is measured by optimal filtering.	eps version, pdf version
Measured conversion factors of ET / ADC as functions of eta for newly installed ATLAS Liquid Argon (LAr) Phase-I digital trigger readout board in the barrel A-side of the ATLAS LAr Electromagnetic calorimeter. The digital trigger readout board covers a region of 0 < η < 1.52, -1.78 < φ< -1.39, and was installed in the end of October 2019. The ET / ADC is determined from DAC setting divided by the measured pulse height in ADC, with the DAC value converted to EM scale transverse energy based on test beam results.	eps version, pdf version

Main readout comparison plots.

The following plots compare some Liquid Argon (LAr) Calorimeter parameters measured with calibration data taking. They compare the data from a reference recording taken the 12^th of December 2018 and the data taken after the refurbishment of the front-end boards (cooling plates and layer summing board replaced) and front end crates (baseplanes and cooling hoses replaced) during LS2. This second recording happened the 9^th of April 2020.

For simplicity, only the channels of the second layer of the electromagnetic barrel on side A have been used in the comparison. Only the high gain have been used.

The 55 channels already known to have problems of readout during Run 2 have been removed from the comparison. One more channel with problematic readout was found in 2020 and was also excluded from the selection of cells. It yields a total of 14280 considered channels on a total of 14336 (99.6%).

Pedestal comparison

Distributions of the pedestal values in ADC counts versus the pseudorapidity ( $\eta$ ) of the LAr Calorimeter cells. Only the cells of the second layer of the electromagnetic barrel on side A are included. The values have been measured before (A) and after (B) the refurbishment of the front-end crates and front-end boards during the LHC long shutdown 2. Each entry represents for a given cell, the mean pedestal values computed over 100 events and over 8 digitized samples.	(A) eps version, pdf version (B) eps version, pdf version
Mean pedestal values in ADC counts for the cells in a given pseudorapidity ( $\eta$ ) range. Only the cells of the second layer of the electromagnetic barrel on side A are included. The black line shows the values measured at the end of Run 2. The purple dots show the values measured after the refurbishment of the front-end crates and front-end boards during the LHC long shutdown 2. The displayed uncertainties are computed as $\sigma_{ped, cells} / \sqrt{ N_{cells}}$ . $\sigma_{ped, cells}$ is the RMS of the pedestal values over the cells in the given $\eta$ range. $N_{cells}$ is the number of cells in the given $\eta$ range.	eps version, pdf version

Distributions of the pedestal values in ADC counts versus the pseudorapidity ( $\eta$ ) of the LAr Calorimeter cells. Only the cells of the second layer of the electromagnetic barrel on side A are included. The values have been measured before (A) and after (B) the refurbishment of the front-end crates and front-end boards during the LHC long shutdown 2. Each entry represents for a given cell, the mean pedestal values computed over 100 events and over 8 digitized samples.

(A)
eps version, pdf version
(B)
eps version, pdf version

Mean pedestal values in ADC counts for the cells in a given pseudorapidity ( $\eta$ ) range. Only the cells of the second layer of the electromagnetic barrel on side A are included. The black line shows the values measured at the end of Run 2. The purple dots show the values measured after the refurbishment of the front-end crates and front-end boards during the LHC long shutdown 2. The displayed uncertainties are computed as $\sigma_{ped, cells} / \sqrt{ N_{cells}}$ . $\sigma_{ped, cells}$ is the RMS of the pedestal values over the cells in the given $\eta$ range. $N_{cells}$ is the number of cells in the given $\eta$ range.

eps version, pdf version

RMS comparison

Distributions of the RMS in ADC counts of the cell pedestal in ADC counts versus the pseudorapidity ( $\eta$ ) of the LAr Calorimeter cells. Only the cells of the second layer of the electromagnetic barrel on side A are included. The values of RMS have been measured before (A) and after (B) the refurbishment of the front-end crates and front-end boards during the LHC long shutdown 2. Each entry represents for a given cell, the RMS value computed over 100 events and 8 samples. The step at $\eta$ =0.8 is due to the change of the electrodes geometrical structure.	(A) eps version, pdf version (B) eps version, pdf version
Mean value of the RMS in ADC counts for the cells in a given pseudorapidity ( $\eta$ ) range. Only the cells of the second layer of the electromagnetic barrel on side A are included. The black line shows the values measured at the end of Run 2. The purple dots show the values measured after the refurbishment of the front-end crates and front-end boards during the LHC long shutdown 2. The displayed uncertainties are computed as $\sigma_{rms, cells}/\sqrt{N_{cells}}$ . $\sigma_{rms, cells}$ is the RMS of the RMS values over the cells in the given $\eta$ range. $N_{cells}$ is the number of cells in the given $\eta$ range. The step at $\eta$ =0.8 is due to the change of the electrodes geometrical structure.	eps version, pdf version
Distributions of the RMS values in ADC counts subtracted by the mean value of RMS in each bin of pseudorapidity ( $\eta$ ). Only the cells of the second layer of the electromagnetic barrel on side A are included. The black distribution shows the values measured at the end of Run 2. The purple distribution shows the values measured after the refurbishment of the front-end crates and front-end boards during the LHC long shutdown 2.	eps version, pdf version

Distributions of the RMS in ADC counts of the cell pedestal in ADC counts versus the pseudorapidity ( $\eta$ ) of the LAr Calorimeter cells. Only the cells of the second layer of the electromagnetic barrel on side A are included. The values of RMS have been measured before (A) and after (B) the refurbishment of the front-end crates and front-end boards during the LHC long shutdown 2. Each entry represents for a given cell, the RMS value computed over 100 events and 8 samples. The step at $\eta$ =0.8 is due to the change of the electrodes geometrical structure.

(A)
eps version, pdf version
(B)
eps version, pdf version

Mean value of the RMS in ADC counts for the cells in a given pseudorapidity ( $\eta$ ) range. Only the cells of the second layer of the electromagnetic barrel on side A are included. The black line shows the values measured at the end of Run 2. The purple dots show the values measured after the refurbishment of the front-end crates and front-end boards during the LHC long shutdown 2. The displayed uncertainties are computed as $\sigma_{rms, cells}/\sqrt{N_{cells}}$ . $\sigma_{rms, cells}$ is the RMS of the RMS values over the cells in the given $\eta$ range. $N_{cells}$ is the number of cells in the given $\eta$ range. The step at $\eta$ =0.8 is due to the change of the electrodes geometrical structure.

eps version, pdf version

Distributions of the RMS values in ADC counts subtracted by the mean value of RMS in each bin of pseudorapidity ( $\eta$ ). Only the cells of the second layer of the electromagnetic barrel on side A are included. The black distribution shows the values measured at the end of Run 2. The purple distribution shows the values measured after the refurbishment of the front-end crates and front-end boards during the LHC long shutdown 2.

eps version, pdf version

Gain comparison

Distributions of the gain versus the pseudorapidity ( $\eta$ ) of the LAr Calorimeter cells. Only the cells of the second layer of the electromagnetic barrel on side A are included. The gain have been measured before (A) and after (B) the refurbishment of the front-end crates and front-end boards during the LHC long shutdown 2.	(A) eps version, pdf version (B) eps version, pdf version
Mean value of the gain over the LAr Calorimeter cells in a given pseudorapidity ( $\eta$ ) range. Only the cells of the second layer of the electromagnetic barrel on side A are included. The black line shows the values measured at the end of Run 2. The purple dots show the values measured after the refurbishment of the front-end crates and front-end boards during the LHC long shutdown 2. The displayed uncertainties are computed as $\sigma_{gain, cells}/\sqrt{N_{cells}}$ . $\sigma_{gain, cells}$ is the RMS of the gain over the cells in the given $\eta$ range. $N_{cells}$ is the number of cells in the given $\eta$ range. The cause of the systematic increase by approximately half a per-mill over the whole $\eta$ range is under investigation but will have a negligible impact on data analyses.	eps version, pdf version
Distributions of the gain subtracted by the mean value in each bin of pseudorapidity ( $\eta$ ). Only the cells of the second layer of the electromagnetic barrel on side A are included. The black distribution shows the values measured at the end of Run 2. The purple distribution shows the values measured after the refurbishment of the front-end crates and front-end boards during the LHC long shutdown 2.	eps version, pdf version

Distributions of the gain versus the pseudorapidity ( $\eta$ ) of the LAr Calorimeter cells. Only the cells of the second layer of the electromagnetic barrel on side A are included. The gain have been measured before (A) and after (B) the refurbishment of the front-end crates and front-end boards during the LHC long shutdown 2.

(A)
eps version, pdf version
(B)
eps version, pdf version

Mean value of the gain over the LAr Calorimeter cells in a given pseudorapidity ( $\eta$ ) range. Only the cells of the second layer of the electromagnetic barrel on side A are included. The black line shows the values measured at the end of Run 2. The purple dots show the values measured after the refurbishment of the front-end crates and front-end boards during the LHC long shutdown 2. The displayed uncertainties are computed as $\sigma_{gain, cells}/\sqrt{N_{cells}}$ . $\sigma_{gain, cells}$ is the RMS of the gain over the cells in the given $\eta$ range. $N_{cells}$ is the number of cells in the given $\eta$ range. The cause of the systematic increase by approximately half a per-mill over the whole $\eta$ range is under investigation but will have a negligible impact on data analyses.

eps version, pdf version

Distributions of the gain subtracted by the mean value in each bin of pseudorapidity ( $\eta$ ). Only the cells of the second layer of the electromagnetic barrel on side A are included. The black distribution shows the values measured at the end of Run 2. The purple distribution shows the values measured after the refurbishment of the front-end crates and front-end boards during the LHC long shutdown 2.

eps version, pdf version

Electronic noise comparison

Distributions of electronic noise in MeV versus the pseudorapidity ( $\eta$ ) of the LAr Calorimeter cells. Only the cells of the second layer of the electromagnetic barrel on side A are included. The values measured to compute the noise have been measured before (A) and after (B) the refurbishment of the front-end crates and front-end boards during the LHC long shutdown 2.	(A) eps version, pdf version (B) eps version, pdf version
Mean value of the readout electronic noise in MeV over the cells in a given pseudorapidity ( $\eta$ ) range. Only the cells of the second layer of the electromagnetic barrel on side A are included. The black line shows the values measured at the end of Run 2. The purple dots show the values measured after the refurbishment of the front-end crates and front-end boards during the LHC long shutdown 2. The displayed uncertainties are computed as $\sigma_{noise, cells}/\sqrt{N_{cells}}$ . $\sigma_{noise, cells}$ is the noise values over the cells in the given $\eta$ range. $N_{cells}$ is the number of cells in the given $\eta$ range. The cause of the systematic increase of approximately one per mill over the whole $\eta$ range is under investigation but will have a negligible impact on data analyses.	eps version, pdf version
Distributions of the electronic noise in MeV subtracted by the mean value of the noise in each bin of pseudorapidity ( $\eta$ ). Only the cells of the second layer of the electromagnetic barrel on side A are included. The black distribution shows the values measured at the end of Run 2. The purple distribution shows the values measured after the refurbishment of the front-end crates and front-end boards during the LHC long shutdown 2.	eps version, pdf version

Distributions of electronic noise in MeV versus the pseudorapidity ( $\eta$ ) of the LAr Calorimeter cells. Only the cells of the second layer of the electromagnetic barrel on side A are included. The values measured to compute the noise have been measured before (A) and after (B) the refurbishment of the front-end crates and front-end boards during the LHC long shutdown 2.

(A)
eps version, pdf version
(B)
eps version, pdf version

Mean value of the readout electronic noise in MeV over the cells in a given pseudorapidity ( $\eta$ ) range. Only the cells of the second layer of the electromagnetic barrel on side A are included. The black line shows the values measured at the end of Run 2. The purple dots show the values measured after the refurbishment of the front-end crates and front-end boards during the LHC long shutdown 2. The displayed uncertainties are computed as $\sigma_{noise, cells}/\sqrt{N_{cells}}$ . $\sigma_{noise, cells}$ is the noise values over the cells in the given $\eta$ range. $N_{cells}$ is the number of cells in the given $\eta$ range. The cause of the systematic increase of approximately one per mill over the whole $\eta$ range is under investigation but will have a negligible impact on data analyses.

eps version, pdf version

Distributions of the electronic noise in MeV subtracted by the mean value of the noise in each bin of pseudorapidity ( $\eta$ ). Only the cells of the second layer of the electromagnetic barrel on side A are included. The black distribution shows the values measured at the end of Run 2. The purple distribution shows the values measured after the refurbishment of the front-end crates and front-end boards during the LHC long shutdown 2.

eps version, pdf version

Major updates:
-- Main.ClementCamincher - 2020-12-14

Responsible: %EmmanuelMonnier%
%LAR% public

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Attachments

Topic attachments
I	Attachment	History	Action	Size	Date	Who	Comment
pdf	LSB.pdf	r1	manage	22.7 K	2021-06-08 - 17:30	ClementCamincher	Digital Trigger LSB
png	LSB.png	r1	manage	31.6 K	2021-06-08 - 17:30	ClementCamincher	Digital Trigger LSB
eps	PED_ORIG_vs_eta_p0.eps	r1	manage	69.7 K	2020-12-14 - 12:36	ClementCamincher	Pedestal Comparison
pdf	PED_ORIG_vs_eta_p0.pdf	r1	manage	22.4 K	2020-12-14 - 12:36	ClementCamincher	Pedestal Comparison
png	PED_ORIG_vs_eta_p0.png	r1	manage	28.2 K	2020-12-14 - 11:36	ClementCamincher	Pedestal Comparison
eps	PED_REFUR_vs_eta_p0.eps	r1	manage	69.1 K	2020-12-14 - 12:36	ClementCamincher	Pedestal Comparison
pdf	PED_REFUR_vs_eta_p0.pdf	r1	manage	22.4 K	2020-12-14 - 12:36	ClementCamincher	Pedestal Comparison
png	PED_REFUR_vs_eta_p0.png	r1	manage	28.9 K	2020-12-14 - 11:36	ClementCamincher	Pedestal Comparison
eps	PED_h_p1.eps	r1	manage	20.5 K	2020-12-14 - 12:36	ClementCamincher	Pedestal Comparison
pdf	PED_h_p1.pdf	r1	manage	22.1 K	2020-12-14 - 12:36	ClementCamincher	Pedestal Comparison
eps	PED_vs_eta_p0.eps	r1	manage	26.1 K	2020-12-14 - 12:36	ClementCamincher	Pedestal Comparison
pdf	PED_vs_eta_p0.pdf	r1	manage	23.4 K	2020-12-14 - 12:36	ClementCamincher	Pedestal Comparison
png	PED_vs_eta_p0.png	r1	manage	30.8 K	2020-12-14 - 11:36	ClementCamincher	Pedestal comparison
eps	RAMPS_ORIG_vs_eta_p0.eps	r1	manage	42.2 K	2020-12-14 - 12:28	ClementCamincher	Gain Comparison
pdf	RAMPS_ORIG_vs_eta_p0.pdf	r1	manage	18.9 K	2020-12-14 - 12:28	ClementCamincher	Gain Comparison
png	RAMPS_ORIG_vs_eta_p0.png	r1	manage	25.4 K	2020-12-14 - 12:28	ClementCamincher	Gain Comparison
eps	RAMPS_REFUR_vs_eta_p0.eps	r1	manage	41.5 K	2020-12-14 - 12:28	ClementCamincher	Gain Comparison
pdf	RAMPS_REFUR_vs_eta_p0.pdf	r1	manage	18.9 K	2020-12-14 - 12:28	ClementCamincher	Gain Comparison
png	RAMPS_REFUR_vs_eta_p0.png	r1	manage	26.0 K	2020-12-14 - 12:28	ClementCamincher	Gain Comparison
eps	RAMPS_h_pad_p1.eps	r1	manage	26.4 K	2020-12-14 - 12:29	ClementCamincher	Gain Comparison
pdf	RAMPS_h_pad_p1.pdf	r1	manage	26.1 K	2020-12-14 - 12:29	ClementCamincher	Gain Comparison
png	RAMPS_h_pad_p1.png	r1	manage	28.3 K	2020-12-14 - 12:29	ClementCamincher	Gain Comparison
eps	RAMPS_vs_eta_p0.eps	r1	manage	23.4 K	2020-12-14 - 12:29	ClementCamincher	Gain Comparison
pdf	RAMPS_vs_eta_p0.pdf	r1	manage	22.1 K	2020-12-14 - 12:29	ClementCamincher	Gain Comparison
png	RAMPS_vs_eta_p0.png	r1	manage	25.2 K	2020-12-14 - 12:29	ClementCamincher	Gain Comparison
eps	RAWE_ORIG_vs_eta_p0.eps	r1	manage	55.6 K	2020-12-14 - 12:33	ClementCamincher	Electronic noise Comparison
pdf	RAWE_ORIG_vs_eta_p0.pdf	r1	manage	20.9 K	2020-12-14 - 12:33	ClementCamincher	Electronic noise Comparison
png	RAWE_ORIG_vs_eta_p0.png	r1	manage	25.6 K	2020-12-14 - 12:33	ClementCamincher	Electronic noise Comparison
eps	RAWE_REFUR_vs_eta_p0.eps	r1	manage	55.3 K	2020-12-14 - 12:33	ClementCamincher	Electronic noise Comparison
pdf	RAWE_REFUR_vs_eta_p0.pdf	r1	manage	20.9 K	2020-12-14 - 12:33	ClementCamincher	Electronic noise Comparison
png	RAWE_REFUR_vs_eta_p0.png	r1	manage	26.4 K	2020-12-14 - 12:33	ClementCamincher	Electronic noise Comparison
eps	RAWE_h_pad_p1.eps	r1	manage	28.9 K	2020-12-14 - 12:33	ClementCamincher	Electronic noise Comparison
pdf	RAWE_h_pad_p1.pdf	r1	manage	27.8 K	2020-12-14 - 12:33	ClementCamincher	Electronic noise Comparison
png	RAWE_h_pad_p1.png	r1	manage	28.8 K	2020-12-14 - 12:33	ClementCamincher	Electronic noise Comparison
eps	RAWE_vs_eta_p0.eps	r1	manage	23.6 K	2020-12-14 - 12:33	ClementCamincher	Electronic noise Comparison
pdf	RAWE_vs_eta_p0.pdf	r1	manage	22.3 K	2020-12-14 - 12:33	ClementCamincher	Electronic noise Comparison
png	RAWE_vs_eta_p0.png	r1	manage	25.3 K	2020-12-14 - 12:33	ClementCamincher	Electronic noise Comparison
eps	RMS_ORIG_vs_eta_p0.eps	r1	manage	39.6 K	2020-12-14 - 12:18	ClementCamincher	RMS Comparison
pdf	RMS_ORIG_vs_eta_p0.pdf	r1	manage	19.0 K	2020-12-14 - 12:18	ClementCamincher	RMS Comparison
png	RMS_ORIG_vs_eta_p0.png	r1	manage	24.0 K	2020-12-14 - 12:18	ClementCamincher	RMS Comparison
eps	RMS_REFUR_vs_eta_p0.eps	r1	manage	39.8 K	2020-12-14 - 12:18	ClementCamincher	RMS Comparison
pdf	RMS_REFUR_vs_eta_p0.pdf	r1	manage	19.1 K	2020-12-14 - 12:18	ClementCamincher	RMS Comparison
png	RMS_REFUR_vs_eta_p0.png	r1	manage	24.7 K	2020-12-14 - 12:18	ClementCamincher	RMS Comparison
eps	RMS_h_pad_p1.eps	r1	manage	28.8 K	2020-12-14 - 12:23	ClementCamincher	RMS Comparison
pdf	RMS_h_pad_p1.pdf	r1	manage	28.6 K	2020-12-14 - 12:23	ClementCamincher	RMS Comparison
png	RMS_h_pad_p1.png	r1	manage	28.9 K	2020-12-14 - 12:23	ClementCamincher	RMS Comparison
eps	RMS_vs_eta_p0.eps	r1	manage	23.5 K	2020-12-14 - 12:23	ClementCamincher	RMS Comparison
pdf	RMS_vs_eta_p0.pdf	r1	manage	22.2 K	2020-12-14 - 12:23	ClementCamincher	RMS Comparison
png	RMS_vs_eta_p0.png	r1	manage	23.6 K	2020-12-14 - 12:23	ClementCamincher	RMS Comparison
pdf	officialplot.pdf	r1	manage	191.9 K	2021-06-08 - 17:24	ClementCamincher	Baseline corrections
png	officialplot.png	r1	manage	263.6 K	2021-06-08 - 17:24	ClementCamincher	Baseline corrections
pdf	pulseshape.pdf	r1	manage	48.1 K	2021-06-08 - 17:29	ClementCamincher	Digital Trigger Pulse
png	pulseshape.png	r1	manage	32.4 K	2021-06-08 - 17:29	ClementCamincher	Digital Trigger Pulse
pdf	ramp.pdf	r1	manage	20.7 K	2021-06-08 - 17:28	ClementCamincher	Ramps Digital Trigger
png	ramp.png	r1	manage	27.3 K	2021-06-08 - 17:28	ClementCamincher	Ramps Digital Trigger

Topic revision: r3 - 2021-06-08 - ClementCamincher

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