低温永磁波荡器过冷液氮冷却系统的设计

刘莉军; 王淑华; 王健; 李明; 刘以勇; 王莉

doi:10.11889/j.0253-3219.2017.hjs.40.070101

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低温永磁波荡器过冷液氮冷却系统的设计

同步辐射技术及应用 | 更新时间：2021-05-19

- 低温永磁波荡器过冷液氮冷却系统的设计
- Development of sub-cooled liquid nitrogen cooling system for CPMU
- 核技术 2017年40卷第7期文章编号：070101
- 作者机构：
  
  1.中国科学院上海应用物理研究所张江园区上海 201204
  2.中国科学院大学北京 100049
- 作者简介：
  
  [ "刘莉军, 男, 1989年出生, 2012年毕业于武汉大学, 现为硕士研究生, 研究方向为低温工程", "LIU Lijun, male, born in 1989, graduated from Wuhan University in 2012, master student, focusing on cryogenic engineering" ]
  王淑华, E-mail:wangshuhua@sinap.ac.cn WANG Shuhua, E-mail: wangshuhua@sinap.ac.cn
- 基金信息：
  
  国家自然科学基金(11172538)
- DOI：10.11889/j.0253-3219.2017.hjs.40.070101
  中图分类号： TL503.91
- 收稿日期：2017-03-22，
  
  修回日期：2017-04-19，
  
  纸质出版日期：2017-07-10
- 稿件说明：
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刘莉军, 王淑华, 王健, 等. 低温永磁波荡器过冷液氮冷却系统的设计[J]. 核技术, 2017,40(7):070101

Lijun LIU, Shuhua WANG, Jian WANG, et al. Development of sub-cooled liquid nitrogen cooling system for CPMU[J]. Nuclear techniques, 2017, 40(7): 070101
刘莉军, 王淑华, 王健, 等. 低温永磁波荡器过冷液氮冷却系统的设计[J]. 核技术, 2017,40(7):070101 DOI： 10.11889/j.0253-3219.2017.hjs.40.070101.

Lijun LIU, Shuhua WANG, Jian WANG, et al. Development of sub-cooled liquid nitrogen cooling system for CPMU[J]. Nuclear techniques, 2017, 40(7): 070101 DOI： 10.11889/j.0253-3219.2017.hjs.40.070101.

摘要

低温永磁波荡器（Cryogenic Permanent Magnet Undulator

CPMU）是目前插入件技术发展的主要方向之一，其利用一些永磁材料，如钕铁硼（NdFeB）或镨铁棚（PrFeB）的磁场性能在低温下明显高于室温的特性来提高波荡器性能和光源束流品质，工作温区为50-150 K，需要冷却系统的冷却。CPMU冷却系统主要包括过冷液氮冷却系统和磁体阵列冷却回路。本文介绍了上海光源（Shanghai Synchrotron Radiation Facility

SSRF）CPMU过冷液氮冷却系统的设计方案和设计参数，进行了系统主要热负载的分析；对冷却系统中关键设备之一的过冷换热器进行了设计，并计算分析了过冷氮流经CPMU冷却系统的全程阻力损失，为系统另一关键设备液氮泵的选型提供依据。对CPMU过冷液氮冷却系统进行的在线测试表明，该设计满足CPMU样机的冷却需求。

Abstract

Background

The cryogenic permanent magnet undulator (CPMU) is one of the development trends of the insertion technology. The CPMU

made of NdFeB or PrFeB materials

has a better magnetic field performance at low temperature than that at room temperature. The operating temperature of the CPMU is in the range of 50-150 K up to the magnetic material to be adopted. The CPMU cooling system mainly consists of the CPMU sub-cooled liquid nitrogen cooling system and the CPMU magnet array cooling loop.

Purpose

This study aims to develop the CPMU sub-cooled liquid nitrogen (SLN

) cooling system.

Methods

According to the design scheme and design parameters of the first CPMU SLN

cooling system for the Shanghai synchrotron radiation facility (SSRF)

the heat loads of the system were calculated. The sub-cooled heat exchanger

one of the key components of the SLN

system was designed. The flow resistance of the sub-cooled liquid nitrogen going through the whole CPMU cooling system was calculated

which provides the design base for liquid nitrogen recirculation pump.

Results & Conclusion

The first CPMU

made of NdFeB material

and its SLN

cooling system were installed at SSRF since August

2016. Online test results showed that the SLN

system met the CPMU cooling requirements and run stably.

关键词

Keywords

references

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钕铁硼低温永磁波荡器静态热负载研究