Pre-alignment of DTL for China Spallation Neutron Source

Zhenqiang HE; Zhiyong KE; Lan DONG; Na MA; Lingling MEN; Jing LIANG; Tao LUO; Tong WANG; Xiaohui ZHANG

doi:10.11889/j.0253-3219.2017.hjs.40.050201

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Pre-alignment of DTL for China Spallation Neutron Source

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

- Pre-alignment of DTL for China Spallation Neutron Source
- NUCLEAR TECHNIQUES Vol. 40, Issue 5, Article number: 050201(2017)
- 作者机构：
  
  1.中国科学院高能物理研究所北京 100049
  2.东莞中子科学中心东莞 523803
- 作者简介：
- 基金信息：
- DOI：10.11889/j.0253-3219.2017.hjs.40.050201
  CLC： TL53
- Received：13 January 2017，
  
  Revised：15 February 2017，
  
  Published：10 May 2017
- 稿件说明：
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Zhenqiang HE, Zhiyong KE, Lan DONG, et al. Pre-alignment of DTL for China Spallation Neutron Source[J]. Nuclear techniques, 2017, 40(5): 050201
DOI：

Zhenqiang HE, Zhiyong KE, Lan DONG, et al. Pre-alignment of DTL for China Spallation Neutron Source[J]. Nuclear techniques, 2017, 40(5): 050201 DOI： 10.11889/j.0253-3219.2017.hjs.40.050201.

摘要

漂移管直线加速器（Drift Tube Linac，DTL）是中国散裂中子源（China Spallation Neutron Source，CSNS）直线加速器的主要部分，负责将脉冲流强为15 mA的负氢离子从3 MeV加速到80 MeV，再注入到快循环同步加速器（Rapid Cycling Synchrotron，RCS）中实现进一步加速。DTL加速器本身技术工艺复杂，要求极高的加工精度和准直安装精度，是CSNS的关键技术之一。本文介绍了中国散裂中子源漂移管的预准直方法，从最初的预研到正式安装，解决了一系列难题，包括漂移管的标定、安装和准直调整，形成一整套流水线式的预准直流程，最终漂移管预准直的精度优于物理设计指标，可为同类别的准直测量提供参考。

Abstract

Background

The drift tube linac (DTL) is the main part of China Spallation Neutron Source (CSNS)

which can provide 15-mA peak current beam with energy gain from 3 MeV to 80 MeV. And then the beam will be injected into the rapid cycling synchrotron (RCS) for further accelerating.

Purpose

The manufacturing and fabrication of DTL cavity and drift tubes is very complicated

which requires high processing precision and installation accuracy. In this paper

the pre-alignment of DTL was introduced.

Methods

We overcame a lot of difficulties in this process

including the fiducialization

installation and alignment. By distributing the error properly and following the regular pre-alignment process

this work was finally finished on time.

Results

The pre-alignment accuracy was better than the requirement tolerance which is 0.05 mm in three directions.

Conclusion

The results show that the pre-alignment is successful. This job can provide some experiences to other alignment measurement with the same process.

关键词

Keywords

references

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