The Magnetic Field Design of HITFiL Cyclotron

Author

Yao, Q.G. ; Ma, L.Z. ; Hao, H.F. ; Zhang, X.Y. ; Han, S.F. ; Wang, Bingdong ; Yuan, Ping

Author_Institution

Inst. of Modern Phys., Lanzhou, China

Volume

22

Issue

3

fYear

2012

fDate

6/1/2012 12:00:00 AM

Firstpage

4401004

Lastpage

4401004

Abstract

A new Project named HITFiL (Heavy Ion Tumors Therapy Facility in Lanzhou) is being constructed. Its initial injector is a compact cyclotron, which provides a 7 Mev/10 uA carbon beam for the synchrotron. This paper introduces an effective method to design the isochronous magnetic field of the cyclotron. Using a 3D finite element code, an iterative shimming process has been accomplished successfully. The results show that the isochronous deviations between calculated values and theory are smaller than 5 Gauss at most radii and therefore fulfill the requirements. In addition, the magnetic design of the extraction magnets and their interaction with the main field will be presented in this paper.

Keywords

accelerator magnets; cyclotrons; finite element analysis; iterative methods; magnetic fields; particle beam injection; synchrotrons; 3D finite element code; HITFiL cyclotron; Heavy Ion Tumors Therapy Facility in Lanzhou; carbon beam; extraction magnets; isochronous deviations; isochronous magnetic field design; iterative shimming process; synchrotron; Coils; Cyclotrons; Magnetic field measurement; Magnetic separation; Materials; Shape; Extraction magnet; field calculation; isochronous magnetic field; sector shape;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2011.2175190

Filename

6078403