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arXiv 1306.6277physics.ins-detnucl-ex
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H8500C-03光电倍增管的单光电子响应及磁场特性研究

Studies of single-photoelectron response and of performance in magnetic field of a H8500C-03 photomultiplier tube

S. P. Malace, B. D. Sawatzky, H. Gao

摘要:

研究了多阳极光电倍增管H8500 C-03的单电子探测能力及其在强磁场中的性能。我们的研究结果表明,该设备可以很容易地解决信号在单光电子水平,使其适合于光子探测阈值和环形成像切伦科夫探测器。我们还发现,一个大的纵向磁场,高达300高斯,诱导的相对输出的变化最多为55%的边缘像素,最多为15%的中心像素。H8500 C-03在横向磁场中的信号损失比纵向情况明显更明显。我们对单个光电子在磁场中还原的研究指出,从光阴极提取的光电子的场致失焦是信号损失的主要原因。通过适当的屏蔽,PMT可以在高磁场环境中工作。

英文摘要:

We studied the single-photoelectron detection capabilities of a multianode photomultiplier tube H8500C-03 and its performance in high magnetic field. Our results show that the device can readily resolve signals at the single photoelectron level making it suitable for photon detection in both threshold and ring imaging Cerenkov detectors. We also found that a large longitudinal magnetic field, up to 300 Gauss, induces a change in the relative output of at most 55% for an edge pixel, and of at most 15% for a central pixel. The H8500C-03 signal loss in transverse magnetic fields it is significantly more pronounced than for the longitudinal case. Our studies of single photoelectron reduction in magnetic fields point to the field induced misfocusing of the photoelectron extracted from the photocathode as primary cause of signal loss. With appropriate shielding this PMT could function in high magnetic field environments.

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