一种兆伏级低能加速器端电压的校准方法

王泽松; 张瑞; 田灿鑫; 王振国; 付德君

doi:10.11889/j.0253-3219.2018.hjs.41.100201

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一种兆伏级低能加速器端电压的校准方法

低能加速器技术、射线技术及应用 | 更新时间：2021-05-19

- 一种兆伏级低能加速器端电压的校准方法
- A calibration method of terminal voltage on the megavolt low energy accelerator
- 核技术 2018年41卷第10期文章编号：100201
- 作者机构：
  
  1.岭南师范学院物理科学与技术学院湛江 524048
  2.太原科技大学应用科学学院太原 030024
  3.武汉大学物理科学与技术学院武汉 430072
- 作者简介：
  
  [ "王泽松, 男, 1983年出生, 2014年于武汉大学获博士学位, 研究领域为离子束分析和离子注入", "WANG Zesong, male, born in 1983, graduated from Wuhan University with a doctoral degree in 2014, focusing on ion beam analysis and ion implantation" ]
  田灿鑫, E-mail:cxtian@lingnan.edu.cn TIAN Canxin, E-mail:cxtian@lingnan.edu.cn
  付德君, E-mail:djfu@whu.edu.cn FU Dejun, E-mail:djfu@whu.edu.cn
- 基金信息：
  
  深圳科技创新委员会基础研究项目(JCYJ20170818112901473);岭南师范学院自然科学研究项目(LZL1809)
- DOI：10.11889/j.0253-3219.2018.hjs.41.100201
  中图分类号： TL99;0572.2
- 收稿日期：2018-06-19，
  
  修回日期：2018-07-12，
  
  纸质出版日期：2018-10-10
- 稿件说明：
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王泽松, 张瑞, 田灿鑫, 等. 一种兆伏级低能加速器端电压的校准方法[J]. 核技术, 2018,41(10):100201

Zesong WANG, Rui ZHANG, Canxin TIAN, et al. A calibration method of terminal voltage on the megavolt low energy accelerator[J]. Nuclear techniques, 2018, 41(10): 100201
王泽松, 张瑞, 田灿鑫, 等. 一种兆伏级低能加速器端电压的校准方法[J]. 核技术, 2018,41(10):100201 DOI： 10.11889/j.0253-3219.2018.hjs.41.100201.

Zesong WANG, Rui ZHANG, Canxin TIAN, et al. A calibration method of terminal voltage on the megavolt low energy accelerator[J]. Nuclear techniques, 2018, 41(10): 100201 DOI： 10.11889/j.0253-3219.2018.hjs.41.100201.

摘要

受设备使用年限、工作环境和零部件更换等因素影响，兆伏（MV）级低能加速器端电压需要通过较准保证经端电压加速决定的出射离子的能量。本方案以2×1.7 MV串列加速器为例，利用

C（p，p）

C材料非卢瑟福背散射谱在1 750 keV能量点附近出现一个孤立的质子共振散射单峰的特点，采用质子（proton，p）束流垂直入射到高纯石墨靶获得

C（p，p）

C的非卢瑟福背散射谱，结合多道分析器（Multichannel Analyzer，MCA）和SIMNRA6.05拟合程序，定量测量到入射质子束在石墨靶表面发生共振散射的能量阈值为（1 744±2）keV，从而外推出此时加速器端电压的实际值，并对校准结果进行了误差分析。这为MV级低能静电型范德格拉夫加速器（Van der Graff accelerator）或串列加速器在低能区提供了一种有效的端电压较准方法。

Abstract

Background

Due to the influences from durable years

work environment and replacement parts of the dual megavolt tandem accelerator

the terminal voltage output is not accurate enough to ensure the stability of the incident ion energy depends on the terminal voltage acceleration.

Purpose

This study aims to calibrate terminal voltage output of megavolt accelerator for ion-beam materials characterization.

Methods

Taking the 2×1.7 MV accelerator as an example

the calibration method on the terminal voltage is making use of the non-Ruhterford backscattering spectrometry (Non-RBS) spectrum of

C(p

and the proton beam was irradiated vertically on the surface of high-purity graphite target

which was characterized by the scattering peak of the isolated resonance at around 1 750 keV.

Results

Combined with multichannel analyzer (MCA) and SIMNRA 6.05 code

the threshold energy of the resonance scattering reaction between incident proton and the surface of graphite target can be detected as (1 744±2) keV. The actual terminal voltage was extrapolated and the error after calibration also was analyzed.

Conclusion

This calibration method on the terminal voltage provides a reference for megavolt Van der Graff accelerator or tandem accelerator.

关键词

Keywords

references

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