Beam steering correction of the quarter wave resonator in the HISCL

The Intensity Heavy Ion Superconducting Linear Accelerator as the injector of the High Intensity Heavy- Ion Accelerator Facility, which is a new project proposed in China has been designed. One of the design options in the low energy part is based on Quarter Wave Resonators （QWRs）. However, because...

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Published inChinese physics C Vol. 38; no. 10; pp. 107 - 110
Main Author 刘淑会 王志军 张聪 何源
Format Journal Article
LanguageEnglish
Published 01.10.2014
Subjects
Accelerators
Beam steering
Beams (radiation)
Dipoles
Emittance
Injectors
Resonators
Superconductivity
几何结构
射束
波束控制
波长
离子加速器
经设计
谐振器
超导直线加速器
Online AccessGet full text
ISSN1674-1137
0254-3052
DOI10.1088/1674-1137/38/10/107007

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Summary:The Intensity Heavy Ion Superconducting Linear Accelerator as the injector of the High Intensity Heavy- Ion Accelerator Facility, which is a new project proposed in China has been designed. One of the design options in the low energy part is based on Quarter Wave Resonators （QWRs）. However, because of the unsymmetrical geometry of the cavity, there are dipole fields near the beam hole, which may steer the beam vertically, thus leading to emittance growth and beam loss. The effect of the dipole mode field is analyzed, and a method to overcome the beam steering effect by placing QWRs with opposite orientation is proposed in this paper. The simulation results show that the beam steering effect is reduced effectively by this method, and the deviation of the beam centroid is decreased from 2.87 mm to 0.1 mm. The emittance growth is also smaller.
Bibliography:The Intensity Heavy Ion Superconducting Linear Accelerator as the injector of the High Intensity Heavy- Ion Accelerator Facility, which is a new project proposed in China has been designed. One of the design options in the low energy part is based on Quarter Wave Resonators （QWRs）. However, because of the unsymmetrical geometry of the cavity, there are dipole fields near the beam hole, which may steer the beam vertically, thus leading to emittance growth and beam loss. The effect of the dipole mode field is analyzed, and a method to overcome the beam steering effect by placing QWRs with opposite orientation is proposed in this paper. The simulation results show that the beam steering effect is reduced effectively by this method, and the deviation of the beam centroid is decreased from 2.87 mm to 0.1 mm. The emittance growth is also smaller.
LIU Shu-Hui, WANG Zhi-Jun, ZHANG Cong,HE Yuan（Insititution of Modern Physics, the Chinese Academy of Sciences, Lanzhou 730000, China）
11-5641/O4
QWR, lattice structural layout, beam steering
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
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ISSN:1674-1137
0254-3052
DOI:10.1088/1674-1137/38/10/107007