神龙二号多脉冲X射线剂量测量

李勤; 刘军; 王毅; 刘云龙; 李天涛; 石金水; 李劲

doi:10.11884/HPLPB201931.180234

神龙二号多脉冲X射线剂量测量

doi: 10.11884/HPLPB201931.180234

中国工程物理研究院流体物理研究所, 四川绵阳 621900

基金项目: 国防科技专项研究基金项目

详细信息

作者简介:
李勤(1968—)，女，副研究员，主要从事电子直线感应加速器物理参数测量研究; liqin288@163.com

中图分类号: TL506
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出版历程
- 收稿日期: 2018-09-10
- 修回日期: 2018-11-06
- 刊出日期: 2019-01-15

Multi pulse X-ray dose measurement of Dragon-Ⅱ

Institute of Fluid Physics, CAEP, P.O.Box 919-106, Mianyang 621900, China

摘要

摘要: 神龙二号加速器可以产生三个脉冲宽度约80 ns(FWHM)、脉冲间隔约500 ns的X射线，为了获得每个脉冲X射线剂量，采用康普顿探测器和热释光剂量计相结合的方法进行测量。针对神龙二号加速器X射线能谱分布，采用MCNP程序优化设计康普顿探测器，测量多脉冲X射线信号，获得每个脉冲的剂量比例，应用热释光剂量计测量多脉冲X射线总剂量，由总剂量和剂量比例准确得到每个脉冲X射线剂量，实现神龙二号加速器多脉冲X射线剂量测量。
- 康普顿探测器 /
- 热释光剂量计 /
- 多脉冲 /
- X射线剂量 /
- 测量
Abstract: Dragon-Ⅱ is a linear induction accelerator, which can produce up to three bremsstrahlung X-ray pulses. Each X-ray pulse width is about 80 ns(FWHM), and time interval between pulses is about 500 ns. Each pulse X-ray dose is a critical parameter for Dragon-Ⅱ. Compton detector, combined with thermo luminescent dosemeter(TLD), was used to measure X-ray dose per pulse. MCNP program was used to design a Compton detector according to the characteristic of bremsstrahlung produced by Dragon-Ⅱ accelerator. Compton detector can measure multi-pulse X-ray signal and one pulse X-ray signal's integral is proportional to each pulse X-ray dose, and according to the total dose of three pulse X-ray obtained from TLD, each pulse X-ray dose can be obtained accurately.
- Compton detector /
- thermo luminescent dosemeter /
- multi-pulse /
- X-ray dose /
- measurement

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图 1 介质型康普顿探测器结构示意图

Figure 1. Layout of a dielectric Compton detector

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图 2 神龙二号X射线能谱

Figure 2. Bremsstrahlung X-ray energy spectrum of Dragon-Ⅱ

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图 3 探测器灵敏度系数的能量响应

Figure 3. Energy response of Compton detector sensitivity

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图 4 打靶电子束流和脉冲X射线测量信号

Figure 4. Signals of electron beam and pulsed X-ray

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图 5 打靶电子束流信号和康普顿探测器测量的三脉冲X射线信号

Figure 5. Signals of electron beam by beam monitor and three pulsed X-ray by Compton detector

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表 1 X射线累计照射后的剂量测量结果

Table 1. X-ray dose measurement results by cumulative irradiation

No.	E_e/MeV	I_b/kA	X_s/R	X_d/R	X_t/R
5267A	18.6	2.06	353	728	1048
5268B	18.6	2.03	398	728	1048
5269C	18.3	1.91	362		1048

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表 2 康普顿探测器和热释光剂量计测量结果比值

Table 2. Ratio of TLD to Compton detector measurement results

No.	X-ray dose/R	integral of CD signals/(nV·s)	ratio/(R·nV^-1·s^-1)
5266A	356	960	0.37
5267A	353	960	0.37
5268B	398	1110	0.36
5269C	362	1010	0.36
5270AC	698	1840	0.38

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表 3 神龙二号加速器X射线剂量测量结果

Table 3. X-ray dose measurement results of Dragon-Ⅱ

No.		E_e/MeV	I_b/kA	total X-ray dose/(C·kg^-1)	integral of CD signals/(nV·s)	X-ray dose per pulse/(C·kg^-1)
	pulse A	18.2	2.03		1250	0.093
No.5273	pulse B	18.2	2.01	0.284	1310	0.098
	pulse C	18.2	2.05		1240	0.093
	pulse A	19.0	2.09		970	0.110
No.5301	pulse B	19.0	2.06	0.331	1020	0.116
	pulse C	18.9	2.12		920	0.104
	pulse A	19.0	2.08		950	0.104
No.5302	pulse B	19.0	2.06	0.315	1030	0.113
	pulse C	18.9	2.12		900	0.099
	pulse A	19.0	2.08		930	0.103
No.5303	pulse B	18.9	2.06	0.318	1030	0.114
	pulse C	18.9	2.11		910	0.101

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参考文献(10)

[1]	石金水, 邓建军, 章林文, 等. 神龙二号加速器及其关键技术[J]. 强激光与粒子束, 2016, 28: 010201. doi: 10.11884/HPLPB201628.010201 Shi Jinshui, Deng Jianjun, Zhang Linwen, et al. Dragon-Ⅱ and its key technology. High Power Laser and Particle Beams, 2016, 28: 010201 doi: 10.11884/HPLPB201628.010201
[2]	何国荣. 10 MeV LIA X光照射量测量[C]//10 MeV直线感应加速器会议文集. 1994. He Guorong. X-ray exposure measurement of 10MeV LIA//Proceedings of the Conference on 10 MeV Liner Induction Accelerator. 1994
[3]	苏毅. 康普顿二极管的研究[C]//核探测器核电子学1979年会议资料汇编. 1979. Su Yi. Study of Compton Diode//Proceedings of The Conference on Nuclear Detector and Nuclear Electronics. 1979
[4]	Carison G A, Sanford T W L. A solid dielectric Compton diode for measuring short radiation pulse widths[J]. Rev Sci Instrum, 1990, 61(11): 3447-3451. doi: 10.1063/1.1141600
[5]	欧阳晓平, 张忠兵, 王群书, 等. 用于脉冲n/γ混合场γ强度测量的ICI探测器[J]. 高能物理与核物理, 2006, 30(3): 228-231. https://www.cnki.com.cn/Article/CJFDTOTAL-KNWL200603010.htm Ouyang Xiaoping, Zhang Zhongbing, Wang Qunshu, et al. ICI detector for measuring gamma-ray fluxes in mixed gamma-neutron fields. High Energy Physics and Nuclear Physics, 2006, 30(3): 228-231 https://www.cnki.com.cn/Article/CJFDTOTAL-KNWL200603010.htm
[6]	张忠兵, 欧阳晓平, 王伟. ICI探测器单位γ灵敏度研究[J]. 核电子学与探测技术, 2007, 27(1): 5-7. doi: 10.3969/j.issn.0258-0934.2007.01.002 Zhang Zhongbing, Ouyang Xiaoping, Wang Wei. The sensitivity response of ICI detector for γ-ray. Nuclear Electronics & Detection Technology, 2007, 27(1): 5-7 doi: 10.3969/j.issn.0258-0934.2007.01.002
[7]	Fewell T R. Compton diodes: Theory and development for radiation detectors[R]. SC-DR-720118, 1972.
[8]	胡孟春, 陈发新, 李忠宝, 等. 能量响应相对平坦的康普顿探测器[J]. 核电子学与探测技术, 2005, 25(6): 668-670. doi: 10.3969/j.issn.0258-0934.2005.06.025 Hu Mengchun, Chen Faxin, Li Zhongbao, et al. The Compton detector with relative steady-state energy response. Nuclear Electronics & Detection Technology, 2005, 25(6): 668-670 doi: 10.3969/j.issn.0258-0934.2005.06.025
[9]	Hsu H H, Lee H. Monte Carlo calculations of the vacuum Compton detector sensitivities[R]. LA-UR-89-2375, 1989.
[10]	李勤, 刘军. 康普顿探测器优化设计[J]. 强激光与粒子束, 2010, 22(3): 635-638. http://www.hplpb.com.cn/article/id/4205 Li Qin, Liu Jun. Optimization design of Compton detector. High Power Laser and Particle Beams, 2010, 22(3): 635-638 http://www.hplpb.com.cn/article/id/4205