Control of beam halo-chaos by Gauss function in the triangle periodic-focusing channel
Yu Hai-Jun(余海军)a)†, Bai Long(白龙)b), Weng Jia-Qiang(翁甲强)c), Luo Xiao-Shu(罗晓曙)c), and Fang Jin-Qing(方锦清)d)
aDepartment of Physics, Huainan Normal University, Huainan 232001, China; bCollege of Science, China University of Mining and Technology, Xuzhou 221008, China; cCollege of Physics and Information Technology, Guangxi Normal University, Guilin 541004, China; d China Institute of Atomic Energy, Beijing 102413, China
Abstract This paper studies the Kapchinsky--Vladimirsky (K--V) beam through a triangle periodic-focusing magnetic field by using the particle-core model. The beam halo-chaos is found, and an idea of Gauss function controller is proposed based on the strategy of controlling the halo-chaos. It performs multiparticle simulation to control the halo by using the Gauss function control method. The numerical results show that the halo-chaos and its regeneration can be eliminated effectively, and that the radial particle density is uniform at the centre of the beam as long as the control method and appropriate parameter are chosen.
Received: 11 December 2007
Revised: 12 January 2008
Accepted manuscript online:
Fund: Project supported by the National
Natural Science Foundation of China (Grant No 10247005), the Natural
Science Foundation of the Anhui Higher Education Institutions of
China (Grant No KJ2007B187) and the Scientific Research Foundation
of China University of Mining and Technology for the Young (Grant No
OK060119).
Cite this article:
Yu Hai-Jun(余海军), Bai Long(白龙), Weng Jia-Qiang(翁甲强), Luo Xiao-Shu(罗晓曙), and Fang Jin-Qing(方锦清) Control of beam halo-chaos by Gauss function in the triangle periodic-focusing channel 2008 Chin. Phys. B 17 2433
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