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The Electronic Performance Paper of LAr

Editor: Katherine Copic

Performance of the Electronic Readout of the ATLAS Liquid Argon Calorimeters

Published in JINST

AB S T R AC T: The ATLAS detector has been designed for operation at the Large Hadron Collider at CERN. ATLAS includes electromagnetic and hadronic liquid argon calorimeters, with almost 200,000 channels of data that must be sampled at the LHC bunch crossing frequency of 40 MHz. The calorimeter electronics calibration and readout are performed by custom electronics developed specifically for these purposes. This paper describes the system performance of the ATLAS liquid argon calibration and readout electronics, including noise, energy and time resolution, and long term stability, with data taken mainly from full-system calibration runs performed after installation of the system in the ATLAS detector hall at CERN.

Figures

Full Electronics Readout Diagram (Fig. 1)

https://twiki.cern.ch/twiki/pub/AtlasPublic/LArPaperElecPerf/architecture.gif (eps) (pdf)

Front End Electronicic Readout diagram (Fig. 2)

https://twiki.cern.ch/twiki/pub/AtlasPublic/LArPaperElecPerf/feb_schem_simple.gif (eps) (pdf)

Generic Pulse Shape (Fig. 3)

https://twiki.cern.ch/twiki/pub/AtlasPublic/LArPaperElecPerf/shaperpulse.gif (eps) (pdf)

Noise Reduction using Multiple Samples and
Optimal Filtering Technique (Fig. 4)

https://twiki.cern.ch/twiki/pub/AtlasPublic/LArPaperElecPerf/noise_nSamples.gif (eps) (pdf)

Electronic Response for Various Input Currents (Fig. 5)

https://twiki.cern.ch/twiki/pub/AtlasPublic/LArPaperElecPerf/multiDAC.gif (eps) (pdf)

Noise vs eta for all Sections of the LAr Calorimeter (Fig. 6)

https://twiki.cern.ch/twiki/pub/AtlasPublic/LArPaperElecPerf/noise_lar.gif (eps) (pdf)

Coherent Noise for Middle Layer (Fig. 7)

https://twiki.cern.ch/twiki/pub/AtlasPublic/LArPaperElecPerf/coherent_noise_middle.gif (eps) (pdf)

Time Stability of Pedestal, Noise and Autocorrelation funtcion for
EM calorimeter measured in Medium Gain (Fig. 8)

https://twiki.cern.ch/twiki/pub/AtlasPublic/LArPaperElecPerf/EM-MEDIUM_PEDStabilityPlot.gif (eps) (pdf)

https://twiki.cern.ch/twiki/pub/AtlasPublic/LArPaperElecPerf/EM-MEDIUM_NoiseStabilityPlot.gif (eps) (pdf)

https://twiki.cern.ch/twiki/pub/AtlasPublic/LArPaperElecPerf/EM-MEDIUM_AutocorrStabilityPlot.gif (eps) (pdf)

Contribution from Electronics to Energy Resolution (Fig. 9)

https://twiki.cern.ch/twiki/pub/AtlasPublic/LArPaperElecPerf/resolution.gif (eps) (pdf)

Integral Non Linearity from Electronics Chain (Fig. 10)

https://twiki.cern.ch/twiki/pub/AtlasPublic/LArPaperElecPerf/lin.gif (eps) (pdf)

Time Stability of Electronics Gain (Fig. 11)

https://twiki.cern.ch/twiki/pub/AtlasPublic/LArPaperElecPerf/EM-MEDIUM_RampStabilityPlot.gif (eps) (pdf)

Measured Timing Jitter (Fig. 12)

https://twiki.cern.ch/twiki/pub/AtlasPublic/LArPaperElecPerf/EMEC_JitterVsCB.gif (eps) (pdf)

Timing of Energy Reconstruction in DSP (Fig. 13)

https://twiki.cern.ch/twiki/pub/AtlasPublic/LArPaperElecPerf/dsp_scope_label.gif (eps) (pdf)


Responsible: IsaWingerter

-- CarolineCollard - 29-Jun-2010

Last reviewed by: Never reviewed

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Topic revision: r3 - 2010-12-06 - PatrickJussel
 
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