Effects of radiation damage caused by proton irradiation on Multi-Pixel Photon Counters (MPPCs)
Effects of radiation damage caused by proton irradiation on Multi-Pixel Photon Counters (MPPCs)
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DOI：
10.1016/j.nima.2009.02.022
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发表时间：
2009-01
影响因子：
1.4
通讯作者：
T. Matsumura;T. Matsubara;T. Hiraiwa;K. Horie;M. Kuze;K. Miyabayashi;A. Okamura;T. Sawada;S. Shimizu;T. Shinkawa;T. Tsunemi;M. Yosoi
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文献类型：
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作者：
T. Matsumura;T. Matsubara;T. Hiraiwa;K. Horie;M. Kuze;K. Miyabayashi;A. Okamura;T. Sawada;S. Shimizu;T. Shinkawa;T. Tsunemi;M. Yosoi
我们研究了质子引起的辐射损伤对多像素光子计数器 (MPPC) 造成的影响，MPPC 是滨松光子学开发的一种像素化光子探测器。由于辐射损伤，受辐照的 MPPC 样品的漏电流随着总辐照剂量线性增加，即使在辐照一年后也没有完全恢复。至少在高达 8.0Gy（9.1×107n/mm2in 1MeV 中子当量注量，Φeq）的增益中没有观察到显着变化。由于 21Gy 辐照（2.4×108n/mm2in Φeq）后基线波动和噪声堆积，该设备完全丧失了光子计数能力，这对于某些应用（例如环形成像切伦科夫探测器）可能会出现问题。我们发现，在 42Gy 照射（4.8×108n/mm2in Φeq）后，脉冲高度分辨率略有下降，其中测量的样品被数百个光子照射。在能量测量应用中应考虑这种影响。
We have investigated the effects caused by proton-induced radiation damage on Multi-Pixel Photon Counter (MPPC), a pixelized photon detector developed by Hamamatsu Photonics. The leakage current of irradiated MPPC samples linearly increases with total irradiated doses due to radiation damage, which is not completely recovered even after a year from the irradiation. No significant change has been observed in the gains at least up to 8.0Gy (9.1×107n/mm2in 1MeV neutron equivalent fluence, Φeq). The device has completely lost its photon-counting capability due to baseline fluctuations and noise pile-up after 21Gy irradiation (2.4×108n/mm2in Φeq), which might be problematic for some applications, such as ring-imaging Cherenkov detectors. We have found that the pulse-height resolution has been slightly deteriorated after 42Gy irradiation (4.8×108n/mm2in Φeq), where the measured sample has been illuminated with a few hundred photons. This effect should be considered in the case of energy-measurement applications.