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Studies of uniformity of 50 µm low-gain avalanche detectors at the Fermilab test beam

Apresyan, A. and Xie, S. and Pena, C. and Spiropulu, M. (2018) Studies of uniformity of 50 µm low-gain avalanche detectors at the Fermilab test beam. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 895 . pp. 158-172. ISSN 0168-9002. http://resolver.caltech.edu/CaltechAUTHORS:20180606-091031968

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Abstract

In this paper 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 6×10^(14) n/cm^2. 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 6×10^(14) n/cm^2 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.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1016/j.nima.2018.03.074DOIArticle
ORCID:
AuthorORCID
Xie, S.0000-0003-2509-5731
Spiropulu, M.0000-0001-8172-7081
Additional Information:© 2018 Published by Elsevier B.V. Received 5 October 2017, Revised 28 March 2018, Accepted 28 March 2018, Available online 8 April 2018.
Group:CMS@Caltech
Subject Keywords:Silicon; Timing; LGAD; Test beam
Record Number:CaltechAUTHORS:20180606-091031968
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20180606-091031968
Official Citation:A. Apresyan, S. Xie, C. Pena, R. Arcidiacono, N. Cartiglia, M. Carulla, G. Derylo, M. Ferrero, D. Flores, P. Freeman, Z. Galloway, A. Ghassemi, H. Al Ghoul, L. Gray, S. Hidalgo, S. Kamada, S. Los, M. Mandurrino, A. Merlos, N. Minafra, G. Pellegrini, D. Quirion, A. Ronzhin, C. Royon, H. Sadrozinski, A. Seiden, V. Sola, M. Spiropulu, A. Staiano, L. Uplegger, K. Yamamoto, K. Yamamura, Studies of uniformity of 50 μm low-gain avalanche detectors at the Fermilab test beam, Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Volume 895, 2018, Pages 158-172, ISSN 0168-9002, https://doi.org/10.1016/j.nima.2018.03.074. (http://www.sciencedirect.com/science/article/pii/S0168900218304388)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:86824
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:06 Jun 2018 16:38
Last Modified:06 Jun 2018 16:38

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