基于嵌入式EPICS的中子监测仪研制

朱文超; 林汉尚; 周泽然; 蒋诗平

doi:10.11884/HPLPB202133.200168

基于嵌入式EPICS的中子监测仪研制

doi: 10.11884/HPLPB202133.200168

中国科学技术大学国家同步辐射实验室，合肥 230029

基金项目: 国家自然科学基金面上项目（11675170）

详细信息

作者简介:
朱文超（1994—），男，硕士，从事辐射探测和核电子学相关研究；zhuwench@mail.ustc.edu.cn

通讯作者:
蒋诗平（1963—），男，副研究员，从事辐射探测和 X 射线成像相关研究；spjiang@ustc.edu.cn

中图分类号: TL816
计量
- 文章访问数: 1021
- HTML全文浏览量: 273
- PDF下载量: 63
- 被引次数: 0
出版历程
- 收稿日期: 2020-06-16
- 修回日期: 2020-08-10
- 刊出日期: 2021-01-07

Development of a neutron monitor based on embedded EPICS

National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029

摘要

摘要: 针对合肥光源（HLS-Ⅱ）辐射防护与安全需求，且合肥光源的控制系统是基于EPICS架构，为减少辐射监测系统中间的环节，提高合肥光源人身安全联锁可靠性，研制了基于嵌入式EPICS控制系统的中子监测仪。中子监测仪的关键部件-探测器选用BF₃针对合肥光源（HLS-Ⅱ）辐射防护与安全需求，研制了基于嵌入式EPICS的中子监测仪，用于场所与环境辐射场中子的监测。合肥光源的控制系统是基于EPICS架构，为减少辐射监测系统中间的环节，提高合肥光源人身安全联锁可靠性，研制了基于嵌入式EPICS控制系统的中子监测仪。中子监测仪的关键部件-探测器选用BF₃正比计数管，通过对正比计数管产生的微弱电信号加2 kV的正高压偏置，交流耦合介入前置放大器放大，后输出固定宽度的脉冲信号。信号由CORTEX-M3电路计数，后经CORTEX-A8电路处理后将数据发布到局域网。利用镅铍中子源和合肥光源现场辐射环境对所研制的监测仪性能进行了初步测试，结果表明，该监测仪达到设计要求，可用于中子监测。
- 合肥光源 /
- CORTEX-M3电路 /
- 前置放大器 /
- 嵌入式EPICS
Abstract: Aiming at the radiation protection and safety requirements of HLS-II (HLS-Ⅱ), a neutron monitor based on embedded EPICS was developed for neutron monitoring of radiation field and environment. The control system of HLS-II is based on EPICS (Experimental Physics and Industrial Control System) architecture. In order to reduce the middle link of the radiation monitoring system and improve the reliability of the personal safety chain of HLS-II, a neutron monitor based on embedded EPICS control system was developed. The key component of the neutron monitor-detector is the BF₃ proportional counter tube. By adding a 2 kV positive high voltage bias to the weak electrical signal generated by the proportional counter tube, the AC coupling intervenes in the preamplifier for amplification, and then outputs a pulse signal with a fixed width. The signal is counted by the CORTEX-M3 circuit, and then processed by the CORTEX-A8 circuit to publish the data to the local area network. The performance of the developed monitor has been preliminarily tested by using Am-Be neutron source and on-site radiation environment of HLS-II. The results show that the monitor meets the design requirements and can be used for neutron monitoring.
- HLS-II /
- Cortex-M3 circuit /
- preamplifier /
- embedded EPICS

HTML全文

图 1 中子监测仪组成

Figure 1. Neutron monitor composition

下载: 全尺寸图片幻灯片

图 2 EPICS架构

Figure 2. EPICS architecture

下载: 全尺寸图片幻灯片

图 3 前置放大电路框图

Figure 3. Preamplifier circuit

下载: 全尺寸图片幻灯片

图 4 信号源仿真

Figure 4. Signal source simulation

下载: 全尺寸图片幻灯片

图 5 监测仪框图

Figure 5. Block diagram of the neutron monitor

下载: 全尺寸图片幻灯片

图 6 嵌入式EPICS架构

Figure 6. Embedded EPICS architecture

下载: 全尺寸图片幻灯片

图 7 IOC设计流程

Figure 7. IOC design process

下载: 全尺寸图片幻灯片

图 8 探测器与上位机显示界面

Figure 8. Detector and OPI

下载: 全尺寸图片幻灯片

图 9 性能测试实验

Figure 9. Performance testing

下载: 全尺寸图片幻灯片

图 10 应用场所的测试

Figure 10. Testing of application site

下载: 全尺寸图片幻灯片

表 1 数据类型

Table 1. Data type

No.	parameter name	attribute	bit width/bit	data type	unit
A1	counting rate	read-only	40	float	cps
A2	absorbed dose rate	read-only	40	float	μGy/h
A3	dose equivalent rate	read-only	40	float	μSv/h

下载: 导出CSV

参考文献(11)

[1]	Claus G, Boris S. Particle detectors[M]. Hefei: China Science and Technology Press, 2015.
[2]	杨剑波, 黄红, 刘志, 等. 初探中子探测器的研究现状与发展趋势[J]. 科学技术与工程, 2016, 16(14):90-96. (Yang Jianbo, Huang Hong, Liu Zhi, et al. A preliminary study on research status and development trend of neutron detector[J]. Science Technology and Engineering, 2016, 16(14): 90-96
[3]	陈偲. 涂硼稻草管中子探测器若干问题的理论模拟与实验测试[D]. 北京: 清华大学, 2014: 1-6. Cheng Cai. The theoretical simulation and experimental test of boron-coated straw-tube neutron detectors. Beijing: Tsinghua University, 2014: 1-6
[4]	雷传蘅. 新型袖珍式γ, 中子剂量率监视器[J]. 高能物理与核物理, 1987, 11(5):610-613. (Lei Zhuanheng. A new kind of pocket camera-neutron doserate chirper[J]. High Energy Physics and Nuclear Physics, 1987, 11(5): 610-613
[5]	马烈华, 向艳军, 艾杰, 等. 基于BF₃正比管的宽量程脉冲中子探测技术[J]. 强激光与粒子束, 2017, 29:096002. (Ma Liehua, Xiang Yanjun, Ai Jie, et al. Wide range pulsed neutron detection technology based on BF₃ proportional counters[J]. High Power Laser and Particle Beams, 2017, 29: 096002 doi: 10.11884/HPLPB201729.170056
[6]	郭思明, 王攀峰, 李冠稼, 等. 一种中子探测器放大电路的设计与实现[J]. 核电子学与探测技术, 2014, 34(9):1041-1050. (Guo Siming, Wang Panfeng, Li Guanjia, et al. Design and implement of a neutron detector amplifier circuit[J]. Nuclear Electronics and Detection Technology, 2014, 34(9): 1041-1050 doi: 10.3969/j.issn.0258-0934.2014.09.002
[7]	汲长松. 中子探测实验方法[M]. 北京: 原子能出版社, 1998: 63-70. Ji Changsong. Neutron detection. Beijing: Atomic Energy Press, 1998: 63-70).
[8]	马维超, 周明达. 小型中子照相装置慢化体的研究[J]. 原子能科学与技术, 1990, 24(2):8-11. (Ma Weichao, Zhou Mingda. The study of the monderator used in the small-size neutron radiography facility[J]. Atomic Energy Science and Technology, 1990, 24(2): 8-11
[9]	王庆斌, 汤月里, 李楠, 等. 北京正负电子对撞机(BEPC)辐射监测系统的改进[J]. 辐射防护, 2000, 20(9):304-307. (Wang Qingbin, Tang Yueli, Li Nan, et al. Improvement in the radiation monitoring system of Beijing Electron-Positron collider[J]. Radiation Protection, 2000, 20(9): 304-307
[10]	刘功发, 李京袆, 李为民, 等. 合肥光源储存环控制系统[J]. 核技术, 2004, 27(7):501-505. (Liu Gongfa, Li Jingyi, Li Weimin, et al. HLS storage ring control system[J]. Nuclear Techniques, 2004, 27(7): 501-505 doi: 10.3321/j.issn:0253-3219.2004.07.006
[11]	徐加强, 夏晓彬, 盛伊祥子, 等. 上海光源光束线站 BL18U 轫致辐射剂量的计算与测量[J]. 核技术, 2014:070101. (Xu Jiaqiang, Xia Xiaobin, Sheng Yixiangzi, et al. Dose calculation and measurement for bremsstrahlung at BL18U beamline of SSRF[J]. Nuclear Techniques, 2014: 070101 doi: 10.11889/j.0253-3219.2014.hjs.37.070101