摘要
光电倍增管(PMT)光子计数是光子计数技术的一种,通过选择合适的低噪声光电倍增管,并对光电倍增管的光阴极和前几级倍增极进行致冷,以及合理地设计光电倍增管的高压偏置电路和设定后续甄别器的鉴别阈值,可以使PMT光子计数系统对弱光的探测灵敏度达到甚至优于10-17W。文中阐述了PMT光子计数的原理及系统组成,并对提高系统探测灵敏度的技术环节进行了分析。
PMT was one of the single-photon detectors used in photon counting systems. By choosing the appropriate PMT with low noise, cooling for PMT, designing reasonably the high voltage offset circuit of PMT, and setting appropriate threshold of discriminator, the detectability of photon counting system could be improved. The principle and component of photon counting system were expatiated on, and the key technology of improving the detectability of photon counting system was presented.
出处
《光机电信息》
2009年第3期37-42,共6页
OME Information
基金
中国科学院知识创新工程领域前沿项目资助~~
