Chen Hu, Nan Lu, Liyuan Zhang, R. Zhu, Adi Bornheim, L. Narváez, J. Trevor, M. Spiropulu
{"title":"Ionization Dose and Neutron Induced Photocurrent and Readout Noise in LYSO+SiPM Packages","authors":"Chen Hu, Nan Lu, Liyuan Zhang, R. Zhu, Adi Bornheim, L. Narváez, J. Trevor, M. Spiropulu","doi":"10.1109/NSS/MIC42677.2020.9508052","DOIUrl":null,"url":null,"abstract":"The barrel timing layer for the CMS HL-LHC precision timing detector will be constructed using LYSO+SiPM modules. The barrel in HL-LHC beam intensities is expected to be exposed under an ionization dose rate of up to 200 rad/h and a neutron flux of up to 3x106neq/cm2/s. We present results from measurements of photocurrent in the LYSO+SiPM packages induced by Co-60 γ-rays and Cf-252 neutrons. The γ-ray induced readout noise is found to be about 30 keV, which is negligible compared to the 4.2 MeV signal from minimum ionization particles. The neutron induced noise is about 7 keV, which is more than a factor of 4 smaller than that from the ionization dose.","PeriodicalId":6760,"journal":{"name":"2020 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)","volume":"20 1","pages":"1-2"},"PeriodicalIF":0.0000,"publicationDate":"2020-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2020 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/NSS/MIC42677.2020.9508052","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
The barrel timing layer for the CMS HL-LHC precision timing detector will be constructed using LYSO+SiPM modules. The barrel in HL-LHC beam intensities is expected to be exposed under an ionization dose rate of up to 200 rad/h and a neutron flux of up to 3x106neq/cm2/s. We present results from measurements of photocurrent in the LYSO+SiPM packages induced by Co-60 γ-rays and Cf-252 neutrons. The γ-ray induced readout noise is found to be about 30 keV, which is negligible compared to the 4.2 MeV signal from minimum ionization particles. The neutron induced noise is about 7 keV, which is more than a factor of 4 smaller than that from the ionization dose.
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