Development of the micro-channel plate photomultiplier for the Belle II time-of-propagation counter
Development of the micro-channel plate photomultiplier for the Belle II time-of-propagation counter
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开发用于 Belle II 传播时间计数器的微通道板光电倍增管
DOI：
10.1016/j.nima.2014.12.082
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
Kenji Inami et al.
中科院分区：
文献类型：
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作者：
Shigeki Hirose;Toru Iijima;Kenji Inami et al.
贝儿Ⅱ实验中的传播时间计数器是一种采用环形成像切伦科夫技术的新型粒子鉴别装置。为了在1.5T的磁场中以30-40 ps的时间精度探测每个切伦科夫光子，微通道板光电倍增管是适合于TOP计数器的器件。通过在微通道板表面上引入原子层沉积技术，相对于更常规的装置，管寿命提高了3-10倍。总共生产了530个管。为了确保适当的管性能，已经测量了所有单元的量子效率、增益和渡越时间扩展。从每个测量的结果进行了讨论。还报道了用2 GeV/正电子束进行束流测试的结果，并证明了管的良好性能。
The time-of-propagation counter for the Belle II experiment is a new particle identification device using ring imaging Cherenkov technique. In order to detect each Cherenkov photon with a timing precision of 30–40 ps in a 1.5 T magnetic field, a micro-channel plate photomultiplier tube is a suitable device for the TOP counter. By introducing an atomic layer deposition technique on the micro-channel plate surface, the tube lifetime was improved by a factor of 3–10 relative to more conventional devices. A total of 530 tubes have been produced. To ensure appropriate tube performance, the quantum efficiency, gain and transit time spread have been measured for all units. The results from each measurement are discussed. Results from a beamtest with a 2 GeV/cpositron beam are also reported and demonstrate the good tube performance.