Electron emission inhomogeneity and low-frequency parasitic oscillations in a gyrotron

被引：0
|
作者：
Louksha, O [1 ]
Piosczyk, B
Sominski, G
Thumm, M
Samsonov, D
机构：
[1] St Petersburg State Polytech Univ, 29 Polytech Skaya St, St Petersburg 195251, Russia
[2] IHM, Assoc EURATOM FZK, Forschungszentrum Karlsruhe, D-76021 Karlsruhe, Germany
来源：
HIGH ENERGY DENSITY AND HIGH POWER RF | 2006年 / 807卷
关键词：
Gyrotron; helical electron beam; low frequency space charge oscillations; diagnostics of electron beam;
D O I：
暂无
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
In the 74.2 GHz, 100 kW pulse (tau = 30 - 60 mu s) gyrotron, influence of electron emission inhomogeneity and low-frequency oscillations (LFOs) on the quality of helical electron beams (HEBs) and on the gyrotron efficiency were investigated. Electron transverse velocity spread and inhomogeneity of HEB spatial structure caused by azimuthal nonuniformity of electron emission current were determined. An influence of cathode emission inhomogeneity and non-uniform magnetic field in the region of adiabatic compression of HEBs on LFOs was investigated, and a possibility for suppressing these parasitic oscillations while maintaining the output power and efficiency at acceptable levels was shown. The requirements for emission homogeneity of gyrotron cathodes were formulated.
引用
收藏
页码：219 / +
页数：2
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