Topology Optimization of the Pole Shape in Passive Magnetic Channel Using MMA Method

被引：0

作者：

Zhang, Lige ^{[1
]}

Fan, Kuanjun ^{[2
]}

Tan, Ping ^{[2
]}

Chen, Qushan ^{[2
]}

Liu, Xu ^{[2
]}

Han, Wenjie ^{[2
]}

Rao, Yi-nong ^{[3
]}

机构：

[1] TRIUMF, State Key Lab Adv Electromagnet Engn & Technol, Vancouver, BC V6T 2A3, Canada

[2] State Key Lab Adv Electromagnet Engn & Technol, Vancouver, BC, Canada

[3] TRIUMF, Vancouver, BC V6T 2A3, Canada

来源：

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 2020年 / 30卷 / 04期

关键词：

Superconducting magnets; Iron; Magnetic flux; Optimization; Magnetic noise; Magnetic shielding; Cyclotrons; Superconducting cyclotron; passive magnetic channel; topology optimization; CYCLOTRON;

D O I：

10.1109/TASC.2020.2978464

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Passive magnetic channel is a kind of beam focusing elements in a cyclotron. It consists of several soft iron bars that are magnetized by the main field in a cyclotron. In this paper, we proposed a topology optimization method to design the pole shape in passive magnetic channel, this method does not require any fixed geometry pattern or initial design. The nonlinear static magnetic finite-element analysis model is used to calculate the objective magnetic field function. Persuade iron material with variable density is used to describe the iron distribution during the iteration. Method of Moving Asymptotes (MMA) is used to optimize the control variable of iron density distribution on magnetic channel cross-section. In three numerical examples, magnetic channels for a 250 & x00A0;MeV superconducting cyclotron is provided, where the design goal is to provide the given magnetic field gradient and bending angle. The relationship between the design goal and the pole shape pattern is discussed. It reveals that magnetic channel pattern with only 2 iron bars is possible for some design goals.

引用

页数：4

共 7 条

[1] THE MILAN SUPERCONDUCTING CYCLOTRON PROJECT [J].

ACERBI, E ;

AGHION, F ;

BACCAGLIONI, G ;

BELLOMO, G ;

BIRATTARI, C ;

CASTIGLIONI, M ;

DEMARTINIS, C ;

FABRICI, E ;

PAGANI, C ;

RESMINI, F ;

SALOMONE, A ;

VARISCO, G .

IEEE TRANSACTIONS ON NUCLEAR SCIENCE, 1981, 28 (03) :2095-2097

[2] THE EXTRACTION SYSTEM FOR THE K-500 CYCLOTRON AT MSU [J].

FABRICI, E ;

JOHNSON, D ;

RESMINI, FG .

NUCLEAR INSTRUMENTS & METHODS, 1981, 184 (2-3) :301-318

[3]

Krister S., 1998, LECT NOTES DCAMM COU

[4] Precise isochronous field shimming using correlation matrix for compact cyclotrons [J].

Qin, B. ;

Yang, J. ;

Liu, K. F. ;

Chen, D. Z. ;

Li, D. ;

Xiong, Y. Q. ;

Yu, T. Q. ;

Fan, M. W. .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2012, 691 :129-134

[5] Improvement of field quality in passive magnetic channels by using linear programming technique [J].

Sarma, PR ;

Pandit, VS ;

Bhandari, RK .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2000, 455 (03) :539-544

[6] Topology optimization of nonlinear magnetostatics [J].

Wang, S ;

Kang, J .

IEEE TRANSACTIONS ON MAGNETICS, 2002, 38 (02) :1029-1032

[7] Extraction channel design based on an equivalent lumped parameter method for a SCC-250 MeV superconducting cyclotron [J].

Zhang, Lige ;

Fan, Kuanjun ;

Hu, Shengwei ;

Li, Xiaofei ;

Mei, Zhiyuan ;

Zeng, Zhijie ;

Chen, Wei ;

Qin, Bin ;

Rao, Yinong .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2018, 897 :66-71

← 1 →