https://scholars.lib.ntu.edu.tw/handle/123456789/441543
Title: | Survey of the properties of BGO crystals for the Extreme Forward Calorimeter at BELLE | Authors: | Akhmetshin, R. Wang, M.Z. Guo, R.S. Huang, H.C. Lu, R.S. Tsai, K.L. Ueno, K. Wang, C.H. Chou, F.I. Wei, Y.Y. RONG-SHYANG LU WEI-SHU HOU |
Issue Date: | 2000 | Journal Volume: | 455 | Journal Issue: | 2 | Start page/Pages: | 324-328 | Source: | Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment | Abstract: | We check the scintillation light yield of all BGO crystals used for the Extreme Forward Calorimeter (EFC) at BELLE. The percentage spread of the distribution is only 6%. The nonuniformity of the light yields measured lengthwise for the forward EFC is close to 13% and is approximately 0% for the backward EFC. The test crystals, two per ingot, from mass-production are subjected to the radiation hardness test. The results obtained at BINP and NTU are in good agreement. Some EFC crystals, selected randomly, show the light yields drop about 25-50% after receiving 1 krad dose and remain stable afterwards. There is little sensitivity to the rate that the 1 krad dose is received, since the recovery process is very slow, in the order of days to weeks. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/441543 https://www.scopus.com/inward/record.uri?eid=2-s2.0-19244367339&doi=10.1016%2fS0168-9002%2800%2900522-2&partnerID=40&md5=5334fe850deac0c1a521db49bbddbd9e |
ISSN: | 01689002 | DOI: | 10.1016/S0168-9002(00)00522-2 | SDG/Keyword: | Calorimeters; Hardness testing; Light measurement; Particle beams; Extreme forward calorimeters; Particle detectors |
Appears in Collections: | 物理學系 |
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