Time resolution and high-counting rate performance of plastic scintillation counter with multiple MPPC readout

Time resolution and high-counting rate performance of plastic scintillation counter with multiple MPPC readout
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具有多个 MPPC 读数的塑料闪烁计数器的时间分辨率和高计数率性能

DOI:
10.1016/j.nima.2022.166745
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发表时间:
2022
期刊:
Nuclear Instruments and Methods in Physics Research Section A
影响因子:
--
通讯作者:
R. Sekiya
R. Sekiya
中科院分区:
--
文献类型:
--
作者:
Minami Yuto;Ichiki Kiyotomo;R. Sekiya

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我们一直在为WASA探测器开发一种塑料闪烁计数器。从时间分辨率和信号幅度稳定性两个方面系统地研究了塑料闪烁计数器读出最小电离粒子的多像素光子计数器的性能。在不同的入射条件和不同的MPPC设置下,对2.5GeV/c质子束的性能进行了评价。用一个尺寸为550×38×8mm3的塑料闪烁体在每个平面上与多个尺寸为38×8mm2的MPPC进行光学耦合,以探测闪烁光子。观测到的时间分辨率范围为37-80ps(σ),取决于入射位置和角度,每端连接三个MPPC。我们发现,在0.2 MHz的计数速率下,时间分辨率和信号幅度都很一致。
We have been developing a plastic scintillation counter for the WASA detector. The performance of a plastic scintillation counter with Multi-Pixel Photon Counter (MPPC) readout has been systematically investigated for minimum ionizing particles in terms of the time resolution and the signal amplitude stability. The performance was evaluated under various incident conditions of 2.5 GeV/c proton beams and with different MPPC settings. A plastic scintillator with a size of 550× 38× 8 mm 3 was optically coupled with multiple MPPCs at each plane with a size of 38× 8 mm 2 for detecting the scintillation photons. The observed time resolution ranges in 37–80 ps (σ) depending on the incident positions and angles for the case of three MPPCs attached to each end. We found the time resolution and the signal amplitude fairly consistent up to the counting rate of 0.2 MHz.
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