CSNS反角白光中子源真空系统*

doi:10.13385/j.cnki.vacuum.2022.03.02

真空 ›› 2022, Vol. 59 ›› Issue (3): 7-11.doi: 10.13385/j.cnki.vacuum.2022.03.02

CSNS反角白光中子源真空系统^*

王鹏程^1,2, 孙晓阳^1,2, 敬罕涛^1,2, 黄涛^1,2, 刘佳明^1,2, 刘顺明^1,2, 谭彪^1,2

1.中国科学院高能物理研究所,北京 100049;
2.散裂中子源科学中心,广东东莞 523803

收稿日期:2021-02-07 出版日期:2022-05-25 发布日期:2022-06-01
作者简介:王鹏程（1986-）,男,甘肃省庆阳市人,博士生。
基金资助:
*国家重点研发计划（2016YFA0401601）

The Vacuum System of Back-n at CSNS

WANG Peng-cheng^1,2, SUN Xiao-yang^1,2, JING Han-tao^1,2, HUANG Tao^1,2, LIU Jia-ming^1,2, LIU Shun-ming^1,2, TAN Biao^1,2

1. Institute of High Energy Physics（IHEP）, Chinese Academy of Sciences（CAS）, Beijing 100049, China;
2. Spallation Neutron Source Science Center（SNSSC）,Dongguan 523803, China

Received:2021-02-07 Online:2022-05-25 Published:2022-06-01

摘要/Abstract

摘要： 在中国散裂中子源（CSNS）大科学平台中,利用高能质子加速器产生的1.6GeV高能质子轰击固体钨靶,在靶前产生的反向中子束流,经质子通道返回,并引出到中子实验区,被称为反角白光中子源（Back-n）,其具有能谱宽（0~200MeV）、中子产额大（2×10¹⁶n/s）等特点,适合进行核数据测量等高能物理研究。该反角白光中子源真空系统,由和高能质子束流共用的26m超高真空系统和专供中子束流通过的54m高真空系统组成,两个真空系统采用不同的真空获得方案和工艺路线,并用中子束窗隔开,在超高真空侧安装有超高真空插板阀,避免中子束窗损坏后影响加速器的运行。本文介绍了该真空系统的设计及运行情况,其建成为白光中子源的实验研究提供了良好的真空条件。

关键词: 反角白光中子源（Back-n）, 超高/高真空系统, 运行

Abstract: In the China spallation neutron source（CSNS） large scientific platform, 1.6GeV high-energy protons produced by a high-energy proton accelerator are used to bombard a solid tungsten target. The back neutron beam generated in front of the target returns through the proton channel to the neutron experiment area is called the back neutron source（Back-n）. It has the characteristics of wide energy spectrum（0-200MeV）and large neutron yield（2×10¹⁶n/s）, which is suitable for nuclear data measurement and other high-energy physics research. The Back-n vacuum system consists of a 26m ultra-high vacuum system shared with the high-energy proton beam and a 54m high vacuum system dedicated to the passage of the neutron beam. The two vacuum systems adopt different vacuum acquisition schemes and process routes,and are separated by a neutron beam window. An ultra-high vacuum gate valve is installed on the ultra-high vacuum side to prevent the damage of the neutron beam window from affecting the operation of the accelerator. This article introduces the design and operation of the Back-n vacuum system. The establishment of the vacuum system provides high-quality vacuum conditions for the experimental research of the Back-n.

Key words: Back-n, ultra-high/high vacuum system, operation

中图分类号:

TL503.7

王鹏程, 孙晓阳, 敬罕涛, 黄涛, 刘佳明, 刘顺明, 谭彪. CSNS反角白光中子源真空系统^*[J]. 真空, 2022, 59(3): 7-11.

WANG Peng-cheng, SUN Xiao-yang, JING Han-tao, HUANG Tao, LIU Jia-ming, LIU Shun-ming, TAN Biao. The Vacuum System of Back-n at CSNS[J]. VACUUM, 2022, 59(3): 7-11.

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CSNS反角白光中子源真空系统^*

The Vacuum System of Back-n at CSNS

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