强流多注相对论速调管中电子束特性的初步研究

Preliminary study of the characteristic of multi-beam in intense multi-beam relativistic klystron

多注速调管采用多个低导流系数的电子束并行工作,相对于常规单注结构速调管具有工作电压低、效率和增益高等特点,但多电子束特性会带来新的影响.本文基于这方面需求,对强流多注电子束在多注器件结构中的传输特性进行了理论分析、计算机模拟和初步实验研究,研究结果表明多注电子束各束之间的空间电荷力作用会使得电子束绕系统中心旋转,而各束自身的空间电荷力作用,会使得电子束绕束自身中心旋转,并发生扩散,两种作用都可能会使得电子束在传输过程中发生损失.

Compared with the conventional klystron, high power multi-beam klystron makes use of many low perveance beams, then it has a high output efficiency and low operating voltage, but it brings new problems. There fore, the multi-beam intense relativistic electron beam transmission in the multi-beam klystron is investigated by experiment and simulation. The results show that the multi-beam rotates around the center of the system due to the interaction of the multi-beam, and simultaneously the multi-beam rotates around its own center due to the space charge effect of each beam＇s own. All the process can result in electron beams loss.