Noise Pulses in Large Area Optical Modules

作者：Leonora E^*; Aiello S; Giordano V; Randazzo N; Longhitano F; Lo Presti D; Pugliatti C; Sipala V

来源：IEEE Transactions on Nuclear Science, 2014, 61(4): 2097-2104.

DOI：10.1109/TNS.2014.2322655

• Cherenkov detector
• noise pulses
• optical module
• photomultiplier

Large area photomultipliers are widely used in neutrino and astro-particle detectors to measure Cherenkov light in media like water or ice. The key element of these detectors are the so-called %26quot;optical module%26quot;, which consists of a photodetector enclosed in a transparent pressure-resistant container to protect it and ensure good light transmission. Noise pulses at the anode of each photomultiplier strongly affect the performance of the detector. A large study was conducted on noise pulses of large area photomultipliers, considering time and charge distributions of dark pulses, pre-pulses, delayed pulses, and after pulses. The contribution to noise pulses due to the presence of the external glass vessels was also studied, even comparing two vessels of different brands.

• 出版日期2014-8