高压直流连续波光阴极注入器  

Continuous-wave photoinjector based DC gun

作　　者：杨振萍[1] 边清泉[2] 

机构地区：[1]西南科技大学理学院,四川绵阳621010 [2]绵阳师范学院化学系,四川绵阳621000

出　　处：《兰州大学学报（自然科学版）》2008年第3期141-144,共4页Journal of Lanzhou University(Natural Sciences)

基　　金：国家自然科学基金(10347009)资助．

摘　　要：根据高平均功率自由电子激光对电子束的要求,提出了直流高压连续波光阴极注入器,并进行了相应的束流动力学过程研究.采用特殊结构设计的静电加速腔,其加速梯度可以达到10 MV/m.当静电场的加速距离10 cm,漂移空间50 cm时,脉冲宽度为10 ps,阴极表面的束斑半径为2 mm,束团电荷为0.5 nC的电子束,输出束流归一化发射度为5 mm·mrad;用PARMELA程序进行了粒子动力学模拟,注入器输出束流归一化发射度为5.8 mm·mrad.According to request of electron beam on the high-average-power FEL, a continuous-wave pnotoinjector based DC gun was put forward, and the corresponding dynamic process of the beam flow was studied. By applying a novel structure of electrostatic acceleration, the acceleration grads can reach 10 MV/m. When the acceleration space of electrostatic field is 10 cm, excursion space is 50 cm, and impulse width is 10 ps, and radius of bind spot on the cathode surface is 2 mm, and the charge of bind group is 0.5 nC, normalized beam emittance is 5 mm·mrad; the particle dynamic simulation is also studied by using PARMELA process, the normalized emittance of photoinjetor exporting beam is 5.8 mm·mrad.

关 键 词：光阴极注入器 静电加速器 高平均功率自由电子激光 

分 类 号：O434.3[机械工程—光学工程]