A calibration method of terminal voltage on the megavolt low energy accelerator

Zesong WANG; Rui ZHANG; Canxin TIAN; Zhenguo WANG; Dejun FU

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

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A calibration method of terminal voltage on the megavolt low energy accelerator

LOW ENERGY ACCELERATOR, RAY AND APPLICATIONS | 更新时间：2021-05-19

- A calibration method of terminal voltage on the megavolt low energy accelerator
- NUCLEAR TECHNIQUES Vol. 41, Issue 10, Article number: 100201(2018)
- 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：
- 基金信息：
  
  Fundamental Research Project of Shenzhen Scientific and Technological Innovation Committee;Natural Science Research Project of Lingnan Normal University
- DOI：10.11889/j.0253-3219.2018.hjs.41.100201
  CLC： TL99;0572.2
- Received：19 June 2018，
  
  Revised：12 July 2018，
  
  Published：10 October 2018
- 稿件说明：
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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：

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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