基于温度补偿的多通道MPPC增益稳定性及一致性研究

4 × 4multi-channel MPPC Gain Stability and Uniformity Study Based on the Temperature Compensation

硅光电倍增管(Si PM)作为一种新型光电转换器件,与传统的光电倍增管(PMT)相比有工作电压低、功耗小、集成度高、抗磁场等优点。多像素光子计数器(MPPC)作为Si PM中的一种,本文研究了一种4×4通道MPPC(Hamamatsu,C11206-0404FB(X))的基本性能。作为多通道的光电探测器件,首先研究了相对增益随偏压、工作温度的变化关系,并通过加入温度补偿的办法保持了相对增益(电荷谱峰位)的稳定性;研究了各通道相对增益的差异性,然后通过调整各通道偏置电压实现了各个通道相对增益的一致性。在4×4各个通道增益一致性和稳定性得到满足的情况下,此种MPPC可以很好地使用在闪烁体二维位置分辨探测器的读出电路中。

Silicon photomultiplier（ Si PM） as a new type of photoelectric conversion device,compared with the conventional photomultiplier tube（ PMT）,has some advantages,such as low operating voltage,low power consumption,compactness,magnetic toleration,etc. Multi-pixels photon counter（ MPPC） is a kind of Si PMand the 4 × 4 MPPC array（ Hamamatsu,C11206-0404 FB（ X）） performance are studied. The relative gain is analysed as a function of voltage and temperature,and its stability has been studied with temperature compensation. The differences of relative gains of 4 × 4 channels are compared,and the bias voltage of each channel is adjusted to realize the gain＇s consistency of the 4 × 4 channels. The consistency and stability can be realized and so the multi-channel MPPC can be a good device to be used in two dimensionalreadout of some scintillation detector.