Compact readout of large CLYC scintillators with silicon photomultipler arrays
Compact readout of large CLYC scintillators with silicon photomultipler arrays
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DOI：
10.1016/j.nima.2019.162928
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发表时间：
2020-01
影响因子：
1.4
通讯作者：
S. West;Darrel Beckman;Daniel Coupland;N. Dallmann;C. Hardgrove;K. Mesick;L. Stonehill
中科院分区：
文献类型：
--
作者：
S. West;Darrel Beckman;Daniel Coupland;N. Dallmann;C. Hardgrove;K. Mesick;L. Stonehill
采用8× 8阵列的6 mm硅光电倍增管（SiPMs，具体为SensL ArrayJ-60035- 64 P）和优化的放大和求和电路，实现了大（5× 5× 5cm 3）CLYC闪烁体的紧凑读出。由SiPM阵列读出，晶体在662 keV下产生5.5%的能量分辨率和3.5的品质因数，相当于3英寸Hamamatsu R6233-100 PMT所实现的性能。为了减少通道数并避免阵列中每个SiPM的单独放大，16个SiPM的标准输出被被动地相加然后放大。每个通道使用电流反馈放大器来提供所需的快速响应时间。然后，四个放大的通道被无源地相加，从而产生单个信号通道。基于PSD 8 C ASIC的定制实验室设置用于捕获输出并为PSD计算提供时间门控积分。SiPM阵列读出的紧凑体积、低偏置电压和减小的质量对于空间和国家安全应用是期望的。
Compact readout of a large (5× 5× 5 cm 3) CLYC scintillator was demonstrated with a 8× 8 array of 6mm silicon photomultipliers (SiPMs, specifically, a SensL ArrayJ-60035-64P) and an optimized amplification and summing circuit. Read out by the SiPM array, the crystal yielded an energy resolution of 5.5% at 662 keV and a figure of merit of 3.5, equivalent to the performance achieved with a 3-inch Hamamatsu R6233-100 PMT. To reduce channel count and avoid individual amplification of each SiPM in the array, the standard outputs of 16 SiPMs were passively summed then amplified. A current feedback amplifier was used for each channel to provide the required fast response time. The four amplified channels were then passively summed resulting in a single signal channel. A custom laboratory setup, based on the PSD8C ASIC, was used to capture the output and provide time-gated integration for PSD computation. The compact volume, low bias voltage, and reduced mass of the SiPM array readout are desirable for space and national security applications.