CAJ | 학술논문

过模结构能提高器件的功率容量和工作频率,能使器件工作在低磁场状态,越来越多的器件采用过模结构.但是过模结构允许多个模式同时存在,这可能会引起模式竞争问题.本文通过理论分析和数值计算,研究了过模结构模式选择问题.计算结果表明,通过选择合适的结构参数和电参数,使得器件工作在行波状态,可以实现不同横向模式的选择.在此基础上,通过选择合适的电子束和结构参数,能实现不同纵向模式的选择.对计算结果进行了粒子模拟验证,与理论分析符合较好,达到了模式选择的目的.
과모결구능제고기건적공솔용량화공작빈솔,능사기건공작재저자장상태,월래월다적기건채용과모결구.단시과모결구윤허다개모식동시존재,저가능회인기모식경쟁문제.본문통과이론분석화수치계산,연구료과모결구모식선택문제.계산결과표명,통과선택합괄적결구삼수화전삼수,사득기건공작재행파상태,가이실현불동횡향모식적선택.재차기출상,통과선택합괄적전자속화결구삼수,능실현불동종향모식적선택.대계산결과진행료입자모의험증,여이론분석부합교호,체도료모식선택적목적.
@@@@More and more overmoded structures have been adopted in electronic vacuum devices because they can increase the power capacity and the frequency of the output signals. Overmoded structure device can more easily work in a low magnetic field. Overmoded structure may cause mode competition, which will reduce the output power. Mode selection in overmoded structure is studied in this article. Dispersion relation is obtained and solved numerically. The results show that the appropriate selection of working point that ensures the device working in a traveling wave state can realize transverse mode selection and appropriation selection of parameter of electron beam and the structure can realize the axial mode selection. The calculation results are verified by particle simulation.