Design of a compact C-band high brightness photoinjector for an ultra-fast electron diffraction  

作　　者：LIU XiaoHan TANG ChuanXiang QIAN HouJun CHEN HuaiBi HUANG WenHui 

机构地区：[1]Key Laboratory of Particle & Radiation Imaging, Ministry of Education, Department of Engineering Physics, Tsinghua University

出　　处：《Chinese Science Bulletin》2013年第36期4577-4581,共5页

摘　　要：A compact C-band high brightness photoinjector for ultra-fast electron diffraction(UED)is under development at Tsinghua University.The C-band photoinjector,operating at 5.172 GHz,uses a 1.45-cell C-band RF gun as the electron source.The design of the RF gun has addressed the physics,beam dynamics and mechanical aspects,and based on these design studies,a prototype has been fabricated.In order to obtain optimized performance for the UED,beam dynamics simulation has been carried out using the particle tracking code Astra for the photoinjector consisting of an alternative multi-cell RF gun design and a C-band compressor downstream.The beam dynamics parameters that are optimized include the bunch length,peak current,horizontal emittance,and position of the minimum bunch length.A compact C-band high brightness photoinjector for ultra-fast electron diffraction （UED） is under development at Tsinghua Uni- versity. The C-band photoinjector, operating at 5.172 GHz, uses a 1.45-cell C-band RF gun as the electron source. The design of the RF gun has addressed the physics, beam dynamics and mechanical aspects, and based on these design studies, a prototype has been fabricated. In order to obtain optimized performance for the UED, beam dynamics simulation has been carried out using the particle tracking code Astra for the photoinjector consisting of an alternative multi-cell RF gun design and a C-band compressor downstream. The beam dynamics parameters that are optimized include the bunch length, peak current, horizontal emittance, and position of the minimum bunch length.

关 键 词：电子衍射 C波段 高亮度 紧凑型 设计 微波电子枪 束流动力学 束团长度 

分 类 号：O572.322[理学—粒子物理与原子核物理]