Properties of HPK UFSD after neutron irradiation up to 6e15 n/cm2
Abstract
In this article we report results from a neutron irradiation campaign of Ultra-Fast Silicon Detectors (UFSD) with fluences of 1e14, 3e14, 6e14, 1e15, 3e15 and 6e15 neq/cm2. The UFSD used in this study are circular 50 μm thick Low-Gain Avalanche Detectors (LGAD), with a 1.0 mm diameter active area. Hamamatsu Photonics (HPK), Japan, produced the UFSD with pre-irradiation internal gain in the range 5–70 depending on the bias voltage. The sensors were tested pre-irradiation and post-irradiation with minimum ionizing particles (MIPs) from a 90Sr β-source. The leakage current, internal gain and the timing resolution were measured as a function of bias voltage at -20 °C and -30 °C. The timing resolution of each device under test was extracted from the time difference with a second calibrated UFSD in coincidence, using the constant fraction discriminator (CFD) method for both. The dependence of the gain upon the irradiation fluence is consistent with the acceptor removal mechanism; at -20 °C the highest gain decreases from 70 before radiation to 2 after a fluence of 6e15 n/cm2. Consequently, the timing resolution was found to deteriorate from 20 ps to 50 ps. The results indicate that the most accurate time resolution is obtained varying withmore »
- Authors:
-
more »
- Univ. of California, Santa Cruz, CA (United States)
- Istituto Nazionale di Fisica Nucleare (INFN), Torino (Italy)
- Università del Piemonte Orientale (Italy) ; Istituto Nazionale di Fisica Nucleare (INFN) (Italy)
- University of Ljubljana (Slovenia)
- Publication Date:
- Research Org.:
- Univ. of California, Santa Cruz, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1800169
- Alternate Identifier(s):
- OSTI ID: 1564447
- Grant/Contract Number:
- FG02-04ER41286
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment
- Additional Journal Information:
- Journal Volume: 940; Journal Issue: C; Journal ID: ISSN 0168-9002
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; Instruments & Instrumentation; Nuclear Science & Technology; Physics
Citation Formats
Galloway, Z., Fadeyev, V., Freeman, P., Gkougkousis, E., Gee, C., Gruey, B., Labitan, C. A., Luce, Z., McKinney-Martinez, F., Sadrozinski, H. F. -W., Seiden, A., Spencer, E., Wilder, M., Woods, N., Zatserklyaniy, A., Zhao, Y., Cartiglia, N., Ferrero, M., Mandurrino, M., Staiano, A., Sola, V., Arcidiacono, R., Cindro, V., Kramberger, G., Mandić, I., Mikuž, M., and Zavrtanik, M. Properties of HPK UFSD after neutron irradiation up to 6e15 n/cm2. United States: N. p., 2019.
Web. doi:10.1016/j.nima.2019.05.017.
Galloway, Z., Fadeyev, V., Freeman, P., Gkougkousis, E., Gee, C., Gruey, B., Labitan, C. A., Luce, Z., McKinney-Martinez, F., Sadrozinski, H. F. -W., Seiden, A., Spencer, E., Wilder, M., Woods, N., Zatserklyaniy, A., Zhao, Y., Cartiglia, N., Ferrero, M., Mandurrino, M., Staiano, A., Sola, V., Arcidiacono, R., Cindro, V., Kramberger, G., Mandić, I., Mikuž, M., & Zavrtanik, M. Properties of HPK UFSD after neutron irradiation up to 6e15 n/cm2. United States. https://doi.org/10.1016/j.nima.2019.05.017
Galloway, Z., Fadeyev, V., Freeman, P., Gkougkousis, E., Gee, C., Gruey, B., Labitan, C. A., Luce, Z., McKinney-Martinez, F., Sadrozinski, H. F. -W., Seiden, A., Spencer, E., Wilder, M., Woods, N., Zatserklyaniy, A., Zhao, Y., Cartiglia, N., Ferrero, M., Mandurrino, M., Staiano, A., Sola, V., Arcidiacono, R., Cindro, V., Kramberger, G., Mandić, I., Mikuž, M., and Zavrtanik, M. Tue .
"Properties of HPK UFSD after neutron irradiation up to 6e15 n/cm2". United States. https://doi.org/10.1016/j.nima.2019.05.017. https://www.osti.gov/servlets/purl/1800169.
@article{osti_1800169,
title = {Properties of HPK UFSD after neutron irradiation up to 6e15 n/cm2},
author = {Galloway, Z. and Fadeyev, V. and Freeman, P. and Gkougkousis, E. and Gee, C. and Gruey, B. and Labitan, C. A. and Luce, Z. and McKinney-Martinez, F. and Sadrozinski, H. F. -W. and Seiden, A. and Spencer, E. and Wilder, M. and Woods, N. and Zatserklyaniy, A. and Zhao, Y. and Cartiglia, N. and Ferrero, M. and Mandurrino, M. and Staiano, A. and Sola, V. and Arcidiacono, R. and Cindro, V. and Kramberger, G. and Mandić, I. and Mikuž, M. and Zavrtanik, M.},
abstractNote = {In this article we report results from a neutron irradiation campaign of Ultra-Fast Silicon Detectors (UFSD) with fluences of 1e14, 3e14, 6e14, 1e15, 3e15 and 6e15 neq/cm2. The UFSD used in this study are circular 50 μm thick Low-Gain Avalanche Detectors (LGAD), with a 1.0 mm diameter active area. Hamamatsu Photonics (HPK), Japan, produced the UFSD with pre-irradiation internal gain in the range 5–70 depending on the bias voltage. The sensors were tested pre-irradiation and post-irradiation with minimum ionizing particles (MIPs) from a 90Sr β-source. The leakage current, internal gain and the timing resolution were measured as a function of bias voltage at -20 °C and -30 °C. The timing resolution of each device under test was extracted from the time difference with a second calibrated UFSD in coincidence, using the constant fraction discriminator (CFD) method for both. The dependence of the gain upon the irradiation fluence is consistent with the acceptor removal mechanism; at -20 °C the highest gain decreases from 70 before radiation to 2 after a fluence of 6e15 n/cm2. Consequently, the timing resolution was found to deteriorate from 20 ps to 50 ps. The results indicate that the most accurate time resolution is obtained varying with fluence the CFD value used to determine the time of arrival, from 0.1 for pre-irradiated sensors to 0.6 at the highest fluence. Key changes to the pulse shape induced by irradiation, i.e. (i) the contribution of charge multiplication not limited to the gain layer zone, (ii) the shortening of the rise time and (iii) the reduced pulse height, were compared with the WF2 simulation program and were found to be in agreement.},
doi = {10.1016/j.nima.2019.05.017},
journal = {Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment},
number = C,
volume = 940,
place = {United States},
year = {Tue Oct 01 00:00:00 EDT 2019},
month = {Tue Oct 01 00:00:00 EDT 2019}
}
Web of Science
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