Design and implementation of the Front End Board for the readout of the ATLAS liquid argon calorimeters

Chen, L.; Gingrich, D. M.; Liu, S.; Chen, H.; Farrell, J.; Kierstead, J.A.; Lanni, F.; Lissauer, D.; Ma, H.; Makowiecki, D.; Radeka, V.; Rescia, S.; Takai, H.; Ghazlane, H.; Hoummada, A.; Wilkens, H. G.; Bán, J.; Boettcher, Stephan; Brooijmans, G.; Chi, C.Y.; Caughron, S.; Cooke, M.; Dannheim, D.; Gara, Alan; Haas, A.; Katsanos, I.; Parsons, J. A.; Simion, S.; Sippach, W.; Zhang, L.; Zhou, Na; Ladygin, E.; Augé, E.; Bernier, R.; Bouchel, M.; Bozzone, A; Bretón, D.; Taille, C. De La; Falleau, I.; Imbert, Pierre; Martin-Chassard, Gisèle; Perus, A.; Richer, J.P.; Tocut, V.; Veillet, J. J.; Zerwas, D.; Hubaut, F.; Laforge, B.; Dortz, O. Le; Martín, David; Schwemling, Ph.; Collot, J.; Dzahini, D.; Gallin-Martel, M.-L.; Martin, Ph.; Cwienk, W.; Fent, J.; Kurchaninov, L. L.; Battistoni, G.; Carminati, L.; Citterio, M.; Cleland, W.; Liu, B.; Rabel, J.; Zuk, G.; Benslama, K.; Delagnes, É.; Mansoulié, B.; Teiger, J.; Dinkespiler, B.; Liu, T.; Stroynowski, R.; Yang, Cheng-An; Ye, J.; Chu, M. L.; Lee, S.-C.; Teng, P. K.

doi:10.1088/1748-0221/3/03/p03004

Cited by 44 publications

(38 citation statements)

References 18 publications

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“…The EM calorimeter, with its novel ''accordion'' design, and its readout, which incorporates fast shaping, has excellent timing performance. Quality control tests during production of the electronics required the clock jitter on the LAr readout boards to be less than 20 ps, with typical values of 10 ps [26]. Calibration tests of the overall electronic readout performed in situ in the ATLAS cavern show a timing resolution of %70 ps [27], limited not by the readout but by the jitter of the calibration pulse injection system.…”

Section: B Timing Resolutionmentioning

confidence: 99%

“…To cover the full dynamic range of physics signals of interest, the ATLAS LAr calorimeter readout boards [26] employ three overlapping linear gain scales, dubbed high, medium, and low, where the relative gain of successive scale is reduced by a factor of about 10. For a given event, any individual LAr readout channel is digitized using the D 88, 012001 (2013) gain scale that provides optimal energy resolution, given the energy deposited in that calorimeter cell.…”

Section: B Timing Resolutionmentioning

confidence: 99%

See 1 more Smart Citation

Search for nonpointing photons in the diphoton andETmissfinal state ins=7 TeVproton-p

Aad¹,

Abajyan²,

Abbott³

et al. 2013

Phys. Rev. D

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A search has been performed for photons originating in the decay of a neutral long-lived particle, exploiting the capabilities of the ATLAS electromagnetic calorimeter to make precise measurements of the flight direction of photons, as well as the calorimeter's excellent time resolution. The search has been made in the diphoton plus missing transverse energy final state, using the full data sample of 4:8 fb À1 of 7 TeV proton-proton collisions collected in 2011 with the ATLAS detector at the LHC. No excess is observed above the background expected from Standard Model processes. The results are used to set exclusion limits in the context of gauge mediated supersymmetry breaking models, with the lightest neutralino being the next-to-lightest supersymmetric particle and decaying with a lifetime in excess of 0.25 ns into a photon and a gravitino.

show abstract

Section: B Timing Resolutionmentioning

confidence: 99%

Section: B Timing Resolutionmentioning

confidence: 99%

Search for nonpointing photons in the diphoton andETmissfinal state ins=7 TeVproton-p

Aad¹,

Abajyan²,

Abbott³

et al. 2013

Phys. Rev. D

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show abstract

“…The cell signals are read out through 1524 Front-End Boards (FEBs [20,21]) with 128 channels each, which sit inside front-end crates that are located around the periphery of the cryostats. The FEBs perform analog processing (amplification and shaping-except for the HEC where the amplification is done inside the cryostat), store the signal while waiting for the L1 trigger decision, and digitize the accepted signals.…”

Section: Readout Cell Statusmentioning

confidence: 99%

Readiness of the ATLAS liquid argon calorimeter for LHC collisions

Aad¹,

Abbott²,

Abdallah³

et al. 2010

Eur. Phys. J. C

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The ATLAS liquid argon calorimeter has been operating continuously since August 2006. At this time, only part of the calorimeter was readout, but since the beginning of 2008, all calorimeter cells have been connected to the ATLAS readout system in preparation for LHC collisions. This paper gives an overview of the liquid argon calorimeter performance measured in situ with random triggers, calibration data, cosmic muons, and LHC beam splash events. Results on the detector operation, timing perfore-mail: atlas.secretariat@cern.ch mance, electronics noise, and gain stability are presented. High energy deposits from radiative cosmic muons and beam splash events allow to check the intrinsic constant term of the energy resolution. The uniformity of the electromagnetic barrel calorimeter response along η (averaged over φ) is measured at the percent level using minimum ionizing cosmic muons. Finally, studies of electromagnetic showers from radiative muons have been used to cross-check the Monte Carlo simulation. The performance results obtained using the ATLAS readout, data acquisition, and reconstruction software indicate that the liquid argon calorimeter is well-prepared for collisions at the dawn of the LHC era.

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“…The ionization current signal is preamplified, shaped, buffered and digitized by the frontend boards (FEB) [3] installed on the detector. The FEBs send the digitized pulse via optical links to the Readout Drivers (ROD) which are installed in a radiation free area (USA15) next to the detector cavern (UX15).…”

Section: Lar Calorimeter Readout Electronicsmentioning

confidence: 99%

R&D studies of the ATLAS LAr calorimeter readout electronics for super-LHC

Chen

2010

Nuclear Instruments and Methods in Physics Research Section A:

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Design and implementation of the Front End Board for the readout of the ATLAS liquid argon calorimeters

Cited by 44 publications

References 18 publications

Search for nonpointing photons in the diphoton andETmissfinal state ins=7 TeVproton-p

Search for nonpointing photons in the diphoton andETmissfinal state ins=7 TeVproton-p

Readiness of the ATLAS liquid argon calorimeter for LHC collisions

R&D studies of the ATLAS LAr calorimeter readout electronics for super-LHC

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