9MeV行波电子直线加速器加速管的物理设计

海关大型货物在线检测用加速器采用４ＭＷ速调管作为微波功率源，保证加速管入口功率可达３．５ＭＷ、工作频率为２８５６ＭＨｚ；以行波方式加速电子，聚束器俘获效率大于８０％；加速管全长约２２０ｃｍ；电子能量设置９、６ＭｅＶ两档，对应的额定脉冲束流强度理论设计值分别为１７０和３００ｍＡ。本文给出了纵向粒子动力学、盘荷波导的尺寸及加速管的工作特性等方面的计算结果。

Physical Design of 9 MeV Travelling Wave Electron Linac Accelerating Tube

An accelerating tube is described in this thesis. It is a part of an accelerator used for inspection of vehicle cargoes in rail cars, trucks, shipping containers, or airplanes in customs. A klystron with power of 4 MW and frequency of 2 856 MHz will be applied to supply microwave power. The electrons can be accelerated by a travelling wave in the accelerating tube about 220 cm long, with a buncher whose capture efficiency is more than 80 %. Energy of electrons after travelling through the tube can reach 9 MeV (pulse current intensity 170 mA)or 6 MeV (pulse current intensity 300 mA). Physical design of the accelerating tube, including the calculations of longitudinal particle dynamics, structure parameter and working character is carried out.