(1/2+1/2+1)腔型热阴极微波电子枪
(1/2+1/2+1) cell structure type RF gun
-
摘要: 介绍了一种新型的轴耦合热阴极微波电子枪的设计，该枪采用了缩短首腔以及在首腔与主加速腔间插入耦合半腔的设计思想，在不破坏粒子束性能的基础上尽量减小反轰功率，给出了用Superfish 及Pamela软件进行物理设计以及粒子动力学计算的结果，在脉冲宽度为6μs, 重复频率为25Hz时，阴极上平均反轰功率为3.6W,达到设计要求。Abstract: In order to suppress the back bombardment of electrons in RF thermionic guns, a new kind of on axis coupled structure type RF gun was developed. It is composed of two half cells and a full cell. The first half cell is shortened and a half cell is inserted between the first half cell and the main accelerating cell to defocus the particles moving backwards with highest energy, thus the cathode back bombardment power is strongly reduced. For the field stability the π/2 mode is chosen. The electromagnetic field analytical codes SUPERFISH and PAMELA are mainly used to do the calculation and simulation. The average back bombardment power is about 3.6W, assuming the pulse width of 6μs and a repetition rate of 25Hz.
-
Key words:
- microwave gun (rf gun) /
- thermionic cathode /
- electron back bombardment /
- emittance /
- cell length /
- space charge effect
-
点击查看大图
计量
- 文章访问数: 2232
- HTML全文浏览量: 230
- PDF下载量: 633
- 被引次数: 0
下载:
