CAJ | 학술논문

采用粒子模拟软件，建立了冷阴极发射实心束的高阻抗相对论速调管放大器模型。该模型由1个带屏蔽环的二极管，5个简单药盒型谐振腔和1个锥形收集极构成。为了给具有高效率的高阻抗相对论速调管提供实心束，同时实现设备的简单化和紧凑化，采用冷阴极取代传统的热电子枪，不仅易操作而且大大降低能耗和经费。在传统二极管阴极侧面引入屏蔽环，利用屏蔽极大地提高电子束阻抗，同时屏蔽环的位置和形状能明显降低非发射区的场强，并且有效改善阴极端面发射的均匀性。在束波互作用区，通过依次调节末前腔和输出腔的位置并结合导引磁场的大小对输出的微波进行优化，结果表明：在二极管发射电压525kV、电流328A 的实心束及外加磁场0．35T 的条件下，当注入功率为1kW 时，在11．424GHz 的中心频率处获得了功率81MW，效率47％，增益49dB 的微波。
채용입자모의연건，건립료랭음겁발사실심속적고조항상대론속조관방대기모형。해모형유1개대병폐배적이겁관，5개간단약합형해진강화1개추형수집겁구성。위료급구유고효솔적고조항상대론속조관제공실심속，동시실현설비적간단화화긴주화，채용랭음겁취대전통적열전자창，불부역조작이차대대강저능모화경비。재전통이겁관음겁측면인입병폐배，이용병폐겁대지제고전자속조항，동시병폐배적위치화형상능명현강저비발사구적장강，병차유효개선음겁단면발사적균균성。재속파호작용구，통과의차조절말전강화수출강적위치병결합도인자장적대소대수출적미파진행우화，결과표명：재이겁관발사전압525kV、전류328A 적실심속급외가자장0．35T 적조건하，당주입공솔위1kW 시，재11．424GHz 적중심빈솔처획득료공솔81MW，효솔47％，증익49dB 적미파。
A high impedance relativistic klystron amplifier with a cold solid cathode is designed and investigated by 2.5-D particle-in-cell simulations.The model is composed of a diode with a shielding ring,five pill-box cavities and a cone collector.In order to simplify and minimize the cathode structure,a cold cathode is designed and adopted in a high-impedance relativistic klystron amplifier with rather high conversion efficiency.A shielding ring is introduced to achieve the desired high impedance and reduces the surface electric field to avoid unexpected explosive emissions and ensures the emission uniformity.In the beam-wave interaction region,with optimization of the position of the last two cavities and the magnetic field,the performance of the klystron is validated.It reveals that microwaves with a power of 81 MW are generated at a frequency of 11.424GHz when the beam voltage and current are 525kV and 328 A respectively,under a guiding magnetic field of 0.35 T.The corresponding power conversion efficiency is as high as 47%,and the gain reaches 49 dB when the net injection power is 1 kW.