Study of RF-asymmetry in photo-injector

被引：14

作者：

Guan, Xin ^{[1
]}

Tang, Chuanxiang ^{[1
]}

Chen, Huaibi ^{[1
]}

Huang, Wenhui ^{[1
]}

He, Xiaozhong ^{[1
]}

Xu, Peng ^{[1
]}

Li, Renkai ^{[1
]}

机构：

[1] Tsinghua Univ, Accelerator Lab, Beijing 100084, Peoples R China

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2007年 / 574卷 / 01期

关键词：

RF-asymmetry; Panofsky-Wenzal theorem; multi-pole mode; emittance growth;

D O I：

10.1016/j.nima.2007.01.088

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

In this paper, the RF-asymmetry existing in the full cell of the BNL/SLAC/UCLA 1.6 cell type photo-injector has been investigated. The fields of the multi-pole modes have been analyzed respectively, and lastly, a simple and reliable technique is presented to eliminate the dipole mode with the RF-asymmetry induced by dipole mode. In the process of simulation, the time domain module of CST Microwave Studio is mainly used as the tool to calculate the electro-magnetic fields. The FFT technique is employed to conduct frequency domain analysis for the fields. The results of FFT are utilized to estimate emittance growth induced by higher multi-pole modes, according to the framework of Panofsky-Wenzal theorem. Based on the above analysis, efforts have been made to eliminate dipole fields by modifying the length of vacuum port on the opposite side of RF-coupling port. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：17 / 21

页数：5