1. Gamma-Ray- and Neutron-Induced Photocurrent and Readout Noise in LYSO+SiPM Packages.
- Author
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Hu, Chen, Lu, Nan, Zhang, Liyuan, Zhu, Ren-Yuan, Bornheim, Adi, Narvaez, Lautaro, Trevor, Jason, and Spiropulu, Maria
- Subjects
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LARGE Hadron Collider , *NEUTRON flux , *SILICON crystals , *NOISE , *GAMMA rays - Abstract
Lu2(1–x)Y2xSiO5 (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 × 1014 neq/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. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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