Improvement of the output characteristics of magnetrons using the transparent cathode
Improvement of the output characteristics of magnetrons using the transparent cathode
复制标题
DOI：
10.1109/tps.2006.875771
复制
发表时间：
2006-06
影响因子：
1.5
通讯作者：
H. Bosman;M. Fuks;S. Prasad;E. Schamiloglu
中科院分区：
文献类型：
--
作者：
H. Bosman;M. Fuks;S. Prasad;E. Schamiloglu
通过使用对同步电磁场透明的阴极，可以显着改善磁控管的输出特性，从而为电子势能快速转换为电磁能提供改善的条件。透明阴极由单独的纵向金属条组成，排列形成圆柱形表面，充当单独的电子发射器。通过适当选择阴极条的数量和方位角位置，可以提供有利的电子预聚束以激发所需的操作模式。阴极区域中的强方位角波场迅速将预聚束电子捕获到旋转辐条中，形成阳极电流。该过程比使用固体阴极启动更快。对于任何鞘层厚度，阴极上方电子鞘层中的强波场都可以通过同时增加施加的电压和磁场来提高效率。由固体和透明阴极驱动的 A6 磁控管的计算机模拟证明了这种方法的优点
The output characteristics of magnetrons can be significantly improved by using a cathode that is transparent to the synchronous electromagnetic fields thereby providing improved conditions for fast conversion of the electrons' potential energy into electromagnetic energy. The transparent cathode consists of separate longitudinal metal strips, arranged to form a cylindrical surface, that act as individual electron emitters. Favorable prebunching of electrons to excite the desired operating mode is provided by a suitable choice of the number and azimuthal position of the cathode strips. The strong azimuthal wave field in the cathode region rapidly captures the prebunched electrons into rotating spokes forming the anode current. This process provides faster start-of-oscillations than priming using a solid cathode. The strong wave field in the electron sheath over the cathode, for any sheath thickness, gives the possibility of improving the efficiency by concomitantly increasing the applied voltage and magnetic field. Computer simulations of the A6 magnetron driven both by a solid and transparent cathode demonstrate the advantages of this approach