Theoretical Analysis and Computer Simulation of Eddy-Current Septum Magnets

KANG Wen; DING Xiao-Ping; HAN Qian; PANG Jia-Biao; CHEN Sen-Yu

近期发现有不法分子冒充我刊与作者联系，借此进行欺诈等不法行为，请广大作者加以鉴别，如遇诈骗行为，请第一时间与我刊编辑部联系确认（《中国物理C》（英文）编辑部电话：010-88235947,010-88236950），并作报警处理。

本刊再次郑重声明：

（1）本刊官方网址为cpc.ihep.ac.cn和https://iopscience.iop.org/journal/1674-1137

（2）本刊采编系统作者中心是投稿的唯一路径，该系统为ScholarOne远程稿件采编系统，仅在本刊投稿网网址（https://mc03.manuscriptcentral.com/cpc）设有登录入口。本刊不接受其他方式的投稿，如打印稿投稿、E-mail信箱投稿等，若以此种方式接收投稿均为假冒。

（3）所有投稿均需经过严格的同行评议、编辑加工后方可发表，本刊不存在所谓的“编辑部内部征稿”。如果有人以“编辑部内部人员”名义帮助作者发稿，并收取发表费用，均为假冒。

《中国物理C》（英文）编辑部

2024年10月30日

Chinese Physics C> 2001, Vol. 25> Issue(3) : 264-270

Theoretical Analysis and Computer Simulation of Eddy-Current Septum Magnets

Institute of High Energy Physics, Chinese Academy of Science, Beijing 100039, China2 Institute for Heavy Ion Physics Research, Peking University, Beijing 100871, China

Abstract
HTML
Reference
Related

PDF

Abstract：
The stray field of eddy current septum magnets is analyzed theoretically and also simulated by a computer program. The results from theoretical analysis agree well with those simulated from OPERA program. The maximum of stray field varies inversely with the thickness of septum. It delays some time with respect to the maximum of main field, and the delay time is proportional to square of the thickness of the septum. After stray field increases to its maximum, it starts to decrease very slowly to zero. To reduce stray field fast, one can adopt full sine wave pulse current to power the magnet, The stray field can be reduced to 0.2% at any position and any time by using composite septum (2.4mm Cu+0.6mm Fe). The homogeneity of the main field is superior to 1%.

References

[1]

Reirners R, Peterson J , Avery R et al. IEEE Trans. Nuclear Science, 1997, NS-26(3) : 4027-40292 Lopez F, Mills F, Milton S et al. The APS Thin Pulsed Septum Magnets 1994, Pm. 4th EPAC: 2406-24083 Rohner F. Magnetic Calculation on the Eddy Current Septum Magnet for the ESRF. 1990, ESRF Internal Note AT/MA/90-84 Kumagai K, Matsui S. IEEE Trans. Magn. 1994, 30(4) :2134-21375 Fabris R, Favari A, Tornrnasini D. A High Current Passive Septum Magnet for Elettra. 1992, P m . 2nd EPAC:1460-14626 Kang B K, Miiburn J E. Nucl. Instr. and Meth. in Phys. Res., 1997, A385:6-12

[1]	SUN Da-Rui , XU Jin-Qiang , TANG Kun . Simulation and Error Analysis of Electro-optic Sampling Measurement of Ultrashort Electron Beam Bunch Length. Chinese Physics C, 2008, 32(S1): 121-123.
[2]	WANG Lin-Xiang , ZHU Heng-Jiang , WANG Shi-Heng , WANG Xian-Ming . Simulation of the Penetration Range Distribution for Nitrogen Ions Implanted into the Plant Seed at Low Energy. Chinese Physics C, 2007, 31(3): 311-315.
[3]	BIAN Xiao-Hao , CHEN Huai-Bi , ZHENG Shu-Xin . Calculating of Coupling Factor for the Heterogeneous Part of Accelerating Structure. Chinese Physics C, 2006, 30(1): 62-65.
[4]	WANG Na-Xiu , ZHU Yi , FU Yuan . Simulation of Thermal Distortion of DCM Crystal Indirectly Cooled by LN₂. Chinese Physics C, 2006, 30(8): 802-805.
[5]	XU Hua-Gen , XU Hu-Shan , LI Wen-Fei , ZHAN Wen-Long , XIAO Guo-Qing , SUN Zhi-Yu , GUO Zhong-Yan , LI Song-Lin , DUAN Li-Min , WANG Hong-Wei , XIAO Zhi-Gang , HUANG Wen-Xue , LI C , , , . Monte Carlo Study of the Neutron Detection Wall at RIBLLⅡ in HIRFL-CSR. Chinese Physics C, 2006, 30(1): 57-61.
[6]	BIAN Xiao-Hao , CHEN Huai-Bi , ZHENG Shu-Xin . Calculating of Coupling Factor for Double-Period Accelerating Structure. Chinese Physics C, 2005, 29(9): 900-902.
[7]	TANG Chuan-Xiang , JIANG Zhan-Feng , TIAN Kai , WANG Ying , XU Yi-Yong . Simulation of Micro-Pulse Electron Guns. Chinese Physics C, 2003, 27(6): 546-550.
[8]	YANG Xiao-Dong , Parkhomchuk V , ZHAO Hong-Wei , ZHANG Wen-Zhi , SONG Ming-Tao , YUAN You-Jin , XIA Jia-Wen . Electron Cooling Simulation in HIRFL-CSR Main Ring. Chinese Physics C, 2003, 27(9): 824-827.
[9]	KANG Wen , HAN Qian , HAO Yao-Dou . Theoretical Analysis and Computer Simulation of a New Slotted Pipe Kicker Magnet. Chinese Physics C, 2003, 27(3): 263-267.
[10]	WEN Wan-Xin , JIN Gen-Ming . Monte Carlo Simulations for Optimum Design of Composite Detectors for High Energy γ Ray. Chinese Physics C, 2002, 26(12): 1291-1296.
[11]	KANG Wen , DING Xiao-Ping , HAN Qian , PANG Jia-Biao , CHEN Sen-Yu . Design and Construction of a Thin Septum Magnet Prototype for Injection of SSRF Storage Ring. Chinese Physics C, 2002, 26(4): 423-429.
[12]	CHEN Shi-Bin , ZHANG Yi-Men , CHEN Yu-Sheng , HUANG Liu-Xing , ZHANG Yu-Ming . Simulation of Energy Deposition of Protons and 1MeV Neutrons in Silicon. Chinese Physics C, 2001, 25(4): 365-370.
[13]	DING Xiao-Ping , KANG Wen . Study of Layout Principle and Simulated Calculation for a Resonant Extraction System. Chinese Physics C, 2001, 25(2): 167-173.
[14]	Tang Chuanxiang , Yang Yue , Lin Yuzheng . Simulation of RF Thermionic Gun. Chinese Physics C, 1996, 20(4): 376-384.
[15]	Hou Defu , Li Jiarong . Cutting Rules and Imaginary Parts of Thermal Green Functions in Thermofield Dynamics. Chinese Physics C, 1995, 19(10): 891-897.
[16]	BAO Jing-Dong , ZHU Yi-Zhong . CALCULATION OF THE KINETIC-ENERGY DISTRIBUTIONS OF FISSION-FRAGMENTS FROM MONTE-CARLO SIMULATION TO THE FOUR-DIMENSIONAL LANGEVIN EQUATION. Chinese Physics C, 1989, 13(11): 1023-1031.
[17]	SHEN Wen-Qing . SIMULATION OF QCASI-FISSION INDUCED BY ²³⁸U. Chinese Physics C, 1988, 12(2): 237-245.
[18]	PEI Guo-Xi , ZHANG Wu , TIAN Bao-Ying , XU Jian-Ming . THE FINITE ELEMENT ANALYSIS OF EDDY-CURRENT FIELDS OF A C-TYPE SOLID YOKE BENDING MAGNET. Chinese Physics C, 1988, 12(1): 80-84.
[19]	ZHU Qing-Qi , WU Shi-Pei . SIMULATION CALCULATION FOR DETECTION EFFICIENCY IN THE MEASUREMENT OF COSMIC RAY HADRON SPECTRA. Chinese Physics C, 1985, 9(3): 263-267.
[20]	Chen Jia-er . THE MOTION OF IONS IN RF ION BEAM CHOPPERS. Chinese Physics C, 1980, 4(3): 401-404.

Access

Get Citation

KANG Wen, DING Xiao-Ping, HAN Qian, PANG Jia-Biao and CHEN Sen-Yu. Theoretical Analysis and Computer Simulation of Eddy-Current Septum Magnets[J]. Chinese Physics C, 2001, 25(3): 264-270.

KANG Wen, DING Xiao-Ping, HAN Qian, PANG Jia-Biao and CHEN Sen-Yu. Theoretical Analysis and Computer Simulation of Eddy-Current Septum Magnets[J]. Chinese Physics C, 2001, 25(3): 264-270. shu

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

Received: 2000-01-24
Revised: 1900-01-01

Article Metric

Article Views(4196)
PDF Downloads(666)
Cited by(0)

Policy on re-use

To reuse of subscription content published by CPC, the users need to request permission from CPC, unless the content was published under an Open Access license which automatically permits that type of reuse.

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Theoretical Analysis and Computer Simulation of Eddy-Current Septum Magnets

Corresponding author: KANG Wen,

Institute of High Energy Physics, Chinese Academy of Science, Beijing 100039, China2 Institute for Heavy Ion Physics Research, Peking University, Beijing 100871, China

Received Date: 2000-01-24
Accepted Date: 1900-01-01
Available Online: 2001-03-05

Abstract: The stray field of eddy current septum magnets is analyzed theoretically and also simulated by a computer program. The results from theoretical analysis agree well with those simulated from OPERA program. The maximum of stray field varies inversely with the thickness of septum. It delays some time with respect to the maximum of main field, and the delay time is proportional to square of the thickness of the septum. After stray field increases to its maximum, it starts to decrease very slowly to zero. To reduce stray field fast, one can adopt full sine wave pulse current to power the magnet, The stray field can be reduced to 0.2% at any position and any time by using composite septum (2.4mm Cu+0.6mm Fe). The homogeneity of the main field is superior to 1%.