The eddy current induced in the pulsed bump magnet for the CSNS/RCS injection

The injecton pulsed bending bump magnets of Rapid Cycling Synchrotron （RCS） in China Spalla- tion Neutron Source （CSNS） consist of four horizontal bending （BH） magnets and four vertical bending （BV） magnets. The BH magnets are operated at a repetition rate of 25 Hz and are excited with a trapezoid r...

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Published inChinese physics C Vol. 35; no. 8; pp. 778 - 783
Main Author 宋金星 康文 霍丽华 郝耀斗 王磊
Format Journal Article
LanguageEnglish
Published IOP Publishing 01.08.2011
Subjects
Bending
Eddy current testing
End plates
Horizontal
Neutron sources
RCS
Three dimensional
Trapezoids
Waveforms
中子源
同步加速器
涡流
磁铁
耦合方法
脉冲
诱导
Online AccessGet full text
ISSN1674-1137
0254-3052
2058-6132
DOI10.1088/1674-1137/35/8/015

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Summary:The injecton pulsed bending bump magnets of Rapid Cycling Synchrotron （RCS） in China Spalla- tion Neutron Source （CSNS） consist of four horizontal bending （BH） magnets and four vertical bending （BV） magnets. The BH magnets are operated at a repetition rate of 25 Hz and are excited with a trapezoid rectangle waveform with about 1.6 milliseconds duration. The eddy current is induced in BH magnets and in the end plates it is expected to be large, so the heat generation is of our great concern. In this paper, the eddy current loss of the BH magnet has been investigated and calculated by using a coupling method of 3D electromagnetic and thermal analysis. The accuracy of the analysis is confirmed by testing the prototype BH magnet. The end plate temperature of the BH magnet provided with slit cuts has been decreased obviously and met the requirements.
Bibliography:11-5641/O4
eddy current, BH magnet, injection, CSNS/RCS
SONG Jin-Xing, KANG Wen,HUO Li-Hua,HAO Yao-Dou, WANG Lei（1 Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China Graduate University of Chinese Academy of Sciences, Beijing 100049, China）
The injecton pulsed bending bump magnets of Rapid Cycling Synchrotron （RCS） in China Spalla- tion Neutron Source （CSNS） consist of four horizontal bending （BH） magnets and four vertical bending （BV） magnets. The BH magnets are operated at a repetition rate of 25 Hz and are excited with a trapezoid rectangle waveform with about 1.6 milliseconds duration. The eddy current is induced in BH magnets and in the end plates it is expected to be large, so the heat generation is of our great concern. In this paper, the eddy current loss of the BH magnet has been investigated and calculated by using a coupling method of 3D electromagnetic and thermal analysis. The accuracy of the analysis is confirmed by testing the prototype BH magnet. The end plate temperature of the BH magnet provided with slit cuts has been decreased obviously and met the requirements.
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ISSN:1674-1137
0254-3052
2058-6132
DOI:10.1088/1674-1137/35/8/015