title: An all permanent magnet electron cyclotron resonance ion source for heavy ion therapy.
abstract: A high charge state all permanent Electron Cyclotron Resonance ion source, Lanzhou All Permanent ECR ion source no. 3-LAPECR3, has been successfully built at IMP in 2012, which will serve as the ion injector of the Heavy Ion Medical Machine (HIMM) project. As a commercial device, LAPECR3 features a compact structure, small size, and low cost. According to HIMM scenario more than 100 eμA of C(5+) ion beam should be extracted from the ion source, and the beam emittance better than 75 π*mm*mrad. In recent commissioning, about 120 eμA of C(5+) ion beam was got when work gas was CH4 while about 262 eμA of C(5+) ion beam was obtained when work gas was C2H2 gas. The design and construction of the ion source and its low-energy transportation beam line, and the preliminary commissioning results will be presented in detail in this paper.
authors.affiliation: Institute of Modern Physics, CAS, Lanzhou 730000, China.
authors.forename: Yun
authors.initials: Y
authors.lastname: Cao
authors.affiliation: Institute of Modern Physics, CAS, Lanzhou 730000, China.
authors.forename: Jia Qing
authors.initials: JQ
authors.lastname: Li
authors.affiliation: Institute of Modern Physics, CAS, Lanzhou 730000, China.
authors.forename: Liang Ting
authors.initials: LT
authors.lastname: Sun
authors.affiliation: Institute of Modern Physics, CAS, Lanzhou 730000, China.
authors.forename: Xue Zhen
authors.initials: XZ
authors.lastname: Zhang
authors.affiliation: Institute of Modern Physics, CAS, Lanzhou 730000, China.
authors.forename: Yu Cheng
authors.initials: YC
authors.lastname: Feng
authors.affiliation: Institute of Modern Physics, CAS, Lanzhou 730000, China.
authors.forename: Hui
authors.initials: H
authors.lastname: Wang
authors.affiliation: Institute of Modern Physics, CAS, Lanzhou 730000, China.
authors.forename: Bao Hua
authors.initials: BH
authors.lastname: Ma
authors.affiliation: Institute of Modern Physics, CAS, Lanzhou 730000, China.
authors.forename: Xi Xia
authors.initials: XX
authors.lastname: Li
mesh_terms: D017357:Cyclotrons / Q000295:instrumentation*; D004583:Electrons; D004867:Equipment Design; D063193:Heavy Ion Radiotherapy / Q000295:instrumentation*; D059346:Magnets