Controlling Beam Halo-Chaos by Adaptive Control Exterior Magnetic Field

In this paper, the parametric adaptive method for controlling the beam halo-chaos in the periodic focusing channels of high-current proton linacs is presented. The study of proton beam halo-chaos based on controlled beam envelope equation and the results of particles-in-cell simulations for macro-particle beam show that the proton beam chaotic envelope as well as the beam rsm radius can be controlled to the beam matched radius using this method.For the Kapchinskij-Vladimirskij (K- V) distribution of initial proton beam, all statistical physical, quantities of the beam halo-chaos are largely reduced. This control method has an advantage of the control halo-chaos since the exterior magnetic field as controlled parameter can be rather easily adjusted in the periodical magnetic focusing channels for the experiment.

作 者： GAO Yuan LUO Xiao-Shu FANG Jin-Qing WENG Jia-qiang   作者單位： GAO Yuan(Department of Information and Control Engineering, Guangxi University of Technology, Liuzhou 545006, China)

LUO Xiao-Shu,WENG Jia-qiang(Institute of Physics and Information Engineering, Guangxi Normal University, Guilin 541004, China)

FANG Jin-Qing(China Institute of Atomic Energy, P.O. Box 275-27, Beijing 102413, China) 

刊 名： 理論物理通訊(英文版)  ISTIC SCI 英文刊名： COMMUNICATIONS IN THEORETICAL PHYSICS  年，卷(期)： 2004 42(7)  分類號：   關鍵詞： high-current proton beam   halo-chaos   chaos control   self-adaptive control  

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