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Gamma-Ray- and Neutron-Induced Photocurrent and Readout Noise in LYSO+SiPM Packages

Hu, Chen and Lu, Nan and Zhang, Liyuan and Zhu, Ren-Yuan and Bornheim, Adi and Narváez, Lautaro and Trevor, Jason and Spiropulu, Maria (2021) Gamma-Ray- and Neutron-Induced Photocurrent and Readout Noise in LYSO+SiPM Packages. IEEE Transactions on Nuclear Science, 68 (6). pp. 1244-1250. ISSN 0018-9499. doi:10.1109/tns.2021.3075943.

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Lu_(2(1–x))Y_(2x)SiO₅ (LYSO) crystals readout by a silicon photomultiplier (SiPM) will be used in the barrel timing layer of a precision timing detector for the Compact Muon Solenoid (CMS) experiment at the High-Luminosity Large Hadron Collider (HL-LHC). This detector is expected to be exposed up to 5-Mrad γ-ray dose, 2.5×10¹³ charged hadrons/cm², and 3×10¹⁴n_(eq)/cm² at the HL-LHC for 10 years of operation. We present results of the photocurrent in LYSO+SiPM packages induced by Co-60 γ-rays and Cf-252 neutrons of the expected dose rate and neutron flux, respectively. The γ-ray-induced readout noise is about 30 keV, which is negligible when compared to the 4.2-MeV signal from the minimum ionization particle signals. The neutron-induced readout noise is about 7 keV, which is more than a factor of 4 smaller than that from the γ-rays.

Item Type:Article
Related URLs:
URLURL TypeDescription
Zhang, Liyuan0000-0002-0898-787X
Zhu, Ren-Yuan0000-0003-3091-7461
Bornheim, Adi0000-0002-0128-0871
Narváez, Lautaro0000-0003-2708-8754
Spiropulu, Maria0000-0001-8172-7081
Additional Information:© 2021 IEEE. Manuscript received March 11, 2021; revised April 15, 2021; accepted April 18, 2021. Date of publication April 27, 2021; date of current version June 14, 2021. This work was supported in part by the U.S. Department of Energy, Office of Science, Office of High Energy Physics, under Award DE-SC0011925, in part by Fermilab under Grant PO#661273, and in part by Prime DOE under Grant DE-AC02-07CH11359. The authors are grateful to the CMS collaborators, H. B. Newman, S. Xie, C. Peña, and the CMS Caltech Group for useful discussions and feedback. Maria Spiropulu thanks S. Miscetti and L. Bauerdick for early discussions on the project.
Funding AgencyGrant Number
Department of Energy (DOE)DE-SC0011925
Department of Energy (DOE)DE-AC02-07CH11359
Subject Keywords:Gamma-ray, induced readout noise, Lu2(1−x)Y2xSiO5 (LYSO), neutron, photocurrent, silicon photomultiplier (SiPM)
Issue or Number:6
Record Number:CaltechAUTHORS:20210507-120201518
Persistent URL:
Official Citation:C. Hu et al., "Gamma-Ray- and Neutron-Induced Photocurrent and Readout Noise in LYSO+SiPM Packages," in IEEE Transactions on Nuclear Science, vol. 68, no. 6, pp. 1244-1250, June 2021, doi: 10.1109/TNS.2021.3075943
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:109007
Deposited By: Tony Diaz
Deposited On:07 May 2021 19:52
Last Modified:23 Jun 2021 19:41

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