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

Journal Article · · Journal of Instrumentation
 [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)
+ Show Author Affiliations

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.

Research Organization:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP)
Grant/Contract Number:
SC0012704
OSTI ID:
1661630
Report Number(s):
BNL-216381-2020-JAAM; TRN: US2203606
Journal Information:
Journal of Instrumentation, Vol. 15, Issue 07; ISSN 1748-0221
Publisher:
Institute of Physics (IOP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 10 works
Citation information provided by
Web of Science

References (5)

Ultra-fast silicon detectors (UFSD)
  • Sadrozinski, H. F. -W.; Anker, A.; Chen, J.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 831 https://doi.org/10.1016/j.nima.2016.03.093
journal September 2016
Beam test results of a 16 ps timing system based on ultra-fast silicon detectors
  • Cartiglia, N.; Staiano, A.; Sola, V.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 850 https://doi.org/10.1016/j.nima.2017.01.021
journal April 2017
Prototype ATLAS IBL modules using the FE-I4A front-end readout chip journal November 2012
“ALTIROC0, a 20 pico-second time resolution ASIC for the ATLAS High Granularity Timing Detector (HGTD)”
  • De La Taille, Christophe; Callier, Stéphane; Conforti Di Lorenzo, Selma
  • Proceedings of Topical Workshop on Electronics for Particle Physics — PoS(TWEPP-17) https://doi.org/10.22323/1.313.0006
conference March 2018
Performance of the EUDET-type beam telescopes journal October 2016

Figures / Tables (20)

Figure 1(p. 7)figure Figure 1
Figure 2(p. 8)figure Figure 2
Figure 3(p. 11)figure Figure 3
Table 1(p. 12)table Table 1
Figure 4(p. 13)figure Figure 4
Figure 5(p. 14)figure Figure 5
Figure 6(p. 14)figure Figure 6
Figure 7(p. 16)figure Figure 7
Figure 8(p. 17)figure Figure 8
Figure 10(p. 18)figure Figure 10
Figure 9(p. 18)figure Figure 9
Figure 11(p. 19)figure Figure 11
Figure 12(p. 19)figure Figure 12
Figure 13(p. 21)figure Figure 13
Figure 14(p. 22)figure Figure 14
Table 2(p. 22)table Table 2
Figure 15(p. 23)figure Figure 15
Figure 16(p. 23)figure Figure 16
Figure 17(p. 24)figure Figure 17
Table 3(p. 24)table Table 3

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