A cryogenic system for measuring in the VUV range the absolute quantum efficiency of light detectors with large sensitive area

被引:0
|
作者
Raselli, G. L. [1 ]
Boffelli, F. [1 ,2 ]
Copello, S. [1 ]
de Vecchi, C. [1 ]
Menegolli, A. [1 ,2 ]
Prata, M. C. [1 ]
Rossella, M. [1 ]
Rossini, R. [1 ,2 ]
Scagliotti, C. [1 ]
机构
[1] INFN Sez Pavia, Via A Bassi 6, I-27100 Pavia, Italy
[2] Univ Pavia, Dept Phys, Via A Bassi 6, I-27100 Pavia, Italy
关键词
Photomultiplier; Photo detection; Liquid argon; Quantum efficiency;
D O I
10.1016/j.nima.2024.169807
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
We developed a system to measure changes in PMT photocathode's behavior from room to cryogenic temperatures and to determine the absolute quantum efficiency (Q.E.) by comparing the photocathode current with that of a calibrated photodiode. Preliminary test results on the 8-inch Hamamatsu R5912-MOD PMT coated with approximate to 200 mu g/cm(2) of tetraphenyl butadiene do not show significant variations in Q.E. at cryogenic temperatures with respect to room temperature and are in agreement with other measurements.
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页数:2
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