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远距离大动态范围电荷测量电路的设计
Design of long-distance and large-dynamic-range of charge measurement circuit
- 核技术 2016年39卷第11期 文章编号：110402
- 作者机构：
1.湖南大学 物理与微电子科学学院 长沙 410082
2.中国科学院高能物理研究所 核探测与核电子学国家重点实验室 北京 100049
- 作者简介：
[ "徐福珍,女,1989年出生,2016年于湖南大学获硕士学位,从事FPGA硬件设计", "XU Fuzhen, female, born in 1989, graduated from Hu’nan University with a master’s degree in 2016, engaged in the FPGA hardware design" ]
常劲帆,E-mail:changjf@ihep.ac.cn CHANG Jinfan, E-mail: changjf@ihep.ac.cn
- 基金信息：
DOI：10.11889/j.0253-3219.2016.hjs.39.110402
中图分类号： TL99收稿日期：2016-03-01，
修回日期：2016-04-02，
纸质出版日期：2016-11
- 稿件说明：
移动端阅览
徐福珍, 杨红官, 常劲帆, 等. 远距离大动态范围电荷测量电路的设计[J]. 核技术, 2016,39(11):110402
Fuzhen XU, Hongguan YANG, Jinfan CHANG, et al. Design of long-distance and large-dynamic-range of charge measurement circuit[J]. Nuclear techniques, 2016, 39(11): 110402
徐福珍, 杨红官, 常劲帆, 等. 远距离大动态范围电荷测量电路的设计[J]. 核技术, 2016,39(11):110402 DOI： 10.11889/j.0253-3219.2016.hjs.39.110402.
Fuzhen XU, Hongguan YANG, Jinfan CHANG, et al. Design of long-distance and large-dynamic-range of charge measurement circuit[J]. Nuclear techniques, 2016, 39(11): 110402 DOI： 10.11889/j.0253-3219.2016.hjs.39.110402.
摘要
介绍了大型高海拔空气簇射观测站（Large High Altitude Air Shower Observatory，LHAASO）空气簇射芯探测器阵列（Shower core detector array，SCDA）读出电子学方案的预研设计。系统采用基于电荷积分法的电荷测量方案，读出电子学通过同轴电缆接收光电倍增管输出的电流信号；采用在输入端与电荷积分放大器的虚地点之间接入等效50 Ω电阻的终端阻抗匹配方案，并通过Pspice仿真验证该阻抗匹配的可行性。电路测试结果表明，该电路能满足远距离10 bit大动态范围电荷测量的设计指标要求。
Abstract
Background
2
The air shower core detector array (SCDA) is one of the important detectors to be constructed at the heart of the KM2A (one kilometer square extensive air shower array) with the area of 5 000 m
2
in large high altitude air shower observatory (LHAASO).
Purpose
2
This study aims to design the readout electronics of SCDA for accurate charge measurement of the input photomultiplier tube (PMT) signal for three orders of magnitude.
Methods
2
A 50-Ω impedance match between the "virtual" grounding and input end is employed to measure the charge by the charge integration method. The feasibility of impedance match is verified by "Pspice" simulation tool. The output current signal from the PMT is collected and processed by the readout electronics of charge integration circuit
via
coaxial cable.
Results
2
The performance testing in the laboratory shows that the designed circuit satisfies design requirements of the long-distance and large-dynamic-range charge measurement.
Conclusion
2
The simulation and testing of "virtual" grounding impedance match validate the feasibility of this circuit. The readout electronics fulfills the application requirements of SCDA.
关键词
Keywords
references
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