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Title: Performance of a Front End prototype ASIC for picosecond precision time measurements with LGAD sensors

Abstract

For the High-Luminosity phase of LHC, the ATLAS experiment is proposing the addition of a High Granularity Timing Detector (HGTD) in the forward region, to mitigate the effects of the increased pile-up. The chosen detection technology is Low Gain Avalanche Detector (LGAD) silicon sensors that can provide an excellent timing resolution below 50 ps. The front-end read-out ASIC must exploit the large signal derivative and small noise provided by the sensor, while keeping low power consumption. This paper presents the results on the first prototype of a front-end ASIC, named ALTIROC0, which contains the analog stages (preamplifier and discriminator) of the read-out chip. The ASIC was characterised both alone and as part of a module with a 2×2 LGAD array of 1.1×1.1 mm2 pads bump-bonded to it. The various contributions of the electronics to the time resolution were investigated in test-bench measurements with a calibration setup. Both when the ASIC is alone or with a bump-bonded sensor, the jitter of the ASIC is better than 20 ps for an injected charge of 10 fC. The time walk effect, which arises from the different preamplifier response for various injected charges, can be corrected up to 10 ps using a Time Overmore » Threshold measurement. The combined performance of the ASIC and the LGAD sensor, which was measured during a beam test campaign in October 2018 with pions of 120 GeV energy at the CERN SPS, is around 40 ps for all measured modules. All tested modules show good efficiency and time resolution uniformity.« less

Authors:
 [1];  [2];  [3];  [4];  [4];  [2];  [2];  [2];  [3];  [4];  [4];  [4];  [5];  [6];  [3];  [2];  [7];  [6];  [8];  [2] more »;  [8];  [9] « less
  1. Univ. Paris-Saclay, Gif-sur-Yvette (France)
  2. Ecole Polytechnique, Palaiseau (France)
  3. Universite Paris-Saclay, Orsay (France)
  4. Inst. for High Energy Physics (IFAE), Barcelona (Spain)
  5. Univ. Autonoma de Barcelona (Spain). Inst. Catalana de Recerca i Estudis Avancats (ICREA) and Inst. de Fisica d'Altes Energies (IFAE)
  6. European Organization for Nuclear Research (CERN), Geneva (Switzerland)
  7. Centro Nacional de Microelectronica (CNM-IMB-CSIC), Barcelona (Spain)
  8. Univ. Paris-Sud, Orsay (France)
  9. Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP)
OSTI Identifier:
1661630
Report Number(s):
BNL-216381-2020-JAAM
Journal ID: ISSN 1748-0221
Grant/Contract Number:  
SC0012704
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Instrumentation
Additional Journal Information:
Journal Volume: 15; Journal Issue: 07; Journal ID: ISSN 1748-0221
Publisher:
Institute of Physics (IOP)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; Microstrip pad detectors; Solid state detectors; Timing detectors

Citation Formats

Agapopoulou, Christina, Blin, S., Blot, A., Castillo Garcia, L., Chmeissani, M., Conforti di Lorenzo, S., de La Taille, C., Dinaucourt, P., Fallou, A., Garcia Rodriguez, J., Gkougkousis, V., Grieco, C., Grinstein, S., Guindon, S., Makovec, N., Martin-Chassard, G., Pellegrini, G., Rummler, A., Sacerdoti, S., Seguin Moreau, N., Serin, L., and Tricoli, Alessandro. Performance of a Front End prototype ASIC for picosecond precision time measurements with LGAD sensors. United States: N. p., 2020. Web. doi:10.1088/1748-0221/15/07/p07007.
Agapopoulou, Christina, Blin, S., Blot, A., Castillo Garcia, L., Chmeissani, M., Conforti di Lorenzo, S., de La Taille, C., Dinaucourt, P., Fallou, A., Garcia Rodriguez, J., Gkougkousis, V., Grieco, C., Grinstein, S., Guindon, S., Makovec, N., Martin-Chassard, G., Pellegrini, G., Rummler, A., Sacerdoti, S., Seguin Moreau, N., Serin, L., & Tricoli, Alessandro. Performance of a Front End prototype ASIC for picosecond precision time measurements with LGAD sensors. United States. doi:10.1088/1748-0221/15/07/p07007.
Agapopoulou, Christina, Blin, S., Blot, A., Castillo Garcia, L., Chmeissani, M., Conforti di Lorenzo, S., de La Taille, C., Dinaucourt, P., Fallou, A., Garcia Rodriguez, J., Gkougkousis, V., Grieco, C., Grinstein, S., Guindon, S., Makovec, N., Martin-Chassard, G., Pellegrini, G., Rummler, A., Sacerdoti, S., Seguin Moreau, N., Serin, L., and Tricoli, Alessandro. Mon . "Performance of a Front End prototype ASIC for picosecond precision time measurements with LGAD sensors". United States. doi:10.1088/1748-0221/15/07/p07007. https://www.osti.gov/servlets/purl/1661630.
@article{osti_1661630,
title = {Performance of a Front End prototype ASIC for picosecond precision time measurements with LGAD sensors},
author = {Agapopoulou, Christina and Blin, S. and Blot, A. and Castillo Garcia, L. and Chmeissani, M. and Conforti di Lorenzo, S. and de La Taille, C. and Dinaucourt, P. and Fallou, A. and Garcia Rodriguez, J. and Gkougkousis, V. and Grieco, C. and Grinstein, S. and Guindon, S. and Makovec, N. and Martin-Chassard, G. and Pellegrini, G. and Rummler, A. and Sacerdoti, S. and Seguin Moreau, N. and Serin, L. and Tricoli, Alessandro},
abstractNote = {For the High-Luminosity phase of LHC, the ATLAS experiment is proposing the addition of a High Granularity Timing Detector (HGTD) in the forward region, to mitigate the effects of the increased pile-up. The chosen detection technology is Low Gain Avalanche Detector (LGAD) silicon sensors that can provide an excellent timing resolution below 50 ps. The front-end read-out ASIC must exploit the large signal derivative and small noise provided by the sensor, while keeping low power consumption. This paper presents the results on the first prototype of a front-end ASIC, named ALTIROC0, which contains the analog stages (preamplifier and discriminator) of the read-out chip. The ASIC was characterised both alone and as part of a module with a 2×2 LGAD array of 1.1×1.1 mm2 pads bump-bonded to it. The various contributions of the electronics to the time resolution were investigated in test-bench measurements with a calibration setup. Both when the ASIC is alone or with a bump-bonded sensor, the jitter of the ASIC is better than 20 ps for an injected charge of 10 fC. The time walk effect, which arises from the different preamplifier response for various injected charges, can be corrected up to 10 ps using a Time Over Threshold measurement. The combined performance of the ASIC and the LGAD sensor, which was measured during a beam test campaign in October 2018 with pions of 120 GeV energy at the CERN SPS, is around 40 ps for all measured modules. All tested modules show good efficiency and time resolution uniformity.},
doi = {10.1088/1748-0221/15/07/p07007},
journal = {Journal of Instrumentation},
number = 07,
volume = 15,
place = {United States},
year = {2020},
month = {7}
}

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