Test system for the earth-magnetic effect of large-area photomultipliers

Yichao MA; Na ZHU; Sen QIAN; Feng GAO; Jianrun HU; Guoqing ZHANG; Feipeng NING; Hongshe DANG

doi:10.11889/j.0253-3219.2018.hjs.41.020401

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Test system for the earth-magnetic effect of large-area photomultipliers

NUCLEAR ELECTRONICS AND INSTRUMENTATION | 更新时间：2021-05-19

- Test system for the earth-magnetic effect of large-area photomultipliers
- NUCLEAR TECHNIQUES Vol. 41, Issue 2, Article number: 020401(2018)
- 作者机构：
  
  1.陕西科技大学西安 710021
  2.中国科学院高能物理研究所北京 100049
  3.核探测与核电子学国家重点实验室北京 100049
  4.中国科学院大学北京 100049
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China;National Natural Science Foundation of China
- DOI：10.11889/j.0253-3219.2018.hjs.41.020401
  CLC： TN492
- Received：17 March 2017，
  
  Revised：29 April 2017，
  
  Published：10 February 2018
- 稿件说明：
移动端阅览
Yichao MA, Na ZHU, Sen QIAN, et al. Test system for the earth-magnetic effect of large-area photomultipliers[J]. Nuclear techniques, 2018, 41(2): 020401
DOI：

Yichao MA, Na ZHU, Sen QIAN, et al. Test system for the earth-magnetic effect of large-area photomultipliers[J]. Nuclear techniques, 2018, 41(2): 020401 DOI： 10.11889/j.0253-3219.2018.hjs.41.020401.

摘要

大面积型光电倍增管（Photomultiplier Tube，PMT）广泛应用于各种高能物理实验中，但它对磁场比较敏感，在有地磁场的情况下实验结果的可靠性难以保证。为此，需要在电磁屏蔽间内放置高磁导率磁屏蔽罩定量屏蔽磁场，或在电磁屏蔽室缠绕三围螺线管线圈定量屏蔽地磁场。利用实验虚拟仪器工程平台，基于常用通信协议，建立了一套光电倍增管磁场效应在线测试系统，实现对光斑尺寸和磁场强度的自动调节，光电倍增管阳极信号的实时采集、存储和显示，可用于研究光电倍增管的地磁场效应。

Abstract

Background

Large area photomultiplier tubes (PMTs) have been increasingly applied to high energy physics experiments

reliable results of PMTs' parameters may not be obtained without earth-magnetic (EM) shielding.

Purpose

This study aims to build a test system for EM effect of PMT and obtain its properties in different magnetic field intensity.

Methods

Based on the current PMT performance testing system

high-permeability material is used to qualitatively shield the magnetic field; and the EM shielded room entwined with solenoid coil is used to quantitatively shield the magnetic field. Based on the RS-232

universal serial bus (USB) and local area network (LAN) interface communication protocols

test software is developed in LabVIEW.

Results & Conclusion

The high voltage supply

light source intensity

magnet strength can be remotely automatically adjusted. And anode signal of PMT is real-time sampled and stored. It is helpful for studying earth-magnetic effect of large-area photomultipliers with this system.

关键词

Keywords

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Related Institution

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Physics Department,Nanjing University,Nanjing 210093,China)2

中国科学院高能物理研究所

中国科学院研究生院

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