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Title: Studies of uniformity of 50  μ m low-gain avalanche detectors at the Fermilab test beam

Journal Article · · Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment
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  1. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
  2. California Inst. of Technology (CalTech), Pasadena, CA (United States)
  3. INFN, Torino (Italy); Univ. del Piemonte Orientale (Italy)
  4. INFN, Torino (Italy)
  5. Centro Nacional de Microelectronica (IMB-CNM-CSIC), Barcelona (Spain)
  6. Univ. of California, Santa Cruz, CA (United States)
  7. Hamamatsu Photonics (HPK), Hamamatsu (Japan)
  8. Univ. of Kansas, Lawrence, KS (United States)
+ Show Author Affiliations

In this study, we report measurements of the uniformity of time resolution, signal amplitude, and charged particle detection efficiency across the sensor surface of low-gain avalanche detectors (LGAD). Comparisons of the performance of sensors with different doping concentrations and different active thicknesses are presented, as well as their temperature dependence and radiation tolerance up to 6 x 1014 n/cm2. Results were obtained at the Fermilab test beam facility using 120 GeV proton beams, and a high precision pixel tracking detector. LGAD sensors manufactured by the Centro Nacional de Microelectrónica (CNM) and Hamamatsu Photonics (HPK) were studied. The uniformity of the sensor response in pulse height before irradiation was found to have a 2% spread. The signal detection efficiency and timing resolution in the sensitive areas before irradiation were found to be 100% and 30–40 ps, respectively. A “no-response” area between pads was measured to be about 130 μm for CNM and 170μm for HPK sensors. After a neutron fluence of 6 x 1014 n/cm2 the CNM sensor exhibits a large gain variation of up to a factor of 2.5 when comparing metalized and non-metalized sensor areas. An irradiated CNM sensor achieved a time resolution of 30 ps for the metalized area and 40 ps for the non-metalized area, while a HPK sensor irradiated to the same fluence achieved a 30 ps time resolution.

Research Organization:
Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP)
Grant/Contract Number:
AC02-07CH11359; 2017.027; FG02-04ER41286; SC0011925
OSTI ID:
1457537
Alternate ID(s):
OSTI ID: 1525527
Report Number(s):
FERMILAB-PUB-18-299-PPD; 1679871; TRN: US1901383
Journal Information:
Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 895, Issue C; ISSN 0168-9002
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 12 works
Citation information provided by
Web of Science

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Identification of Long-lived Charged Particles using Time-Of-Flight Systems at the Upgraded LHC detectors text January 2018

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Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
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