CAJ | 학술논문

提出了一种行波提取型同轴渡越时间振荡器，器件的提取腔采用了类膜片加载的扩展互作用腔结构，具有束波作用效率高，电子束空间电势能低等优点。提取腔的电场结构为3π/2模，与传统的类π模结构相比，提高了微波群速度，有利于微波能量的提取。通过引入前置反射腔，提高了调制腔的品质因数，显著降低了起振时间。利用数值模拟软件对所设计的器件进行了模拟和优化，在二极管电压530kV，二极管电流12．8kA，外加导引磁场0．7T 的条件下，得到了2．41GW 的输出功率，微波频率7．76GHz，束波功率转换效率达到35．5％。
제출료일충행파제취형동축도월시간진탕기，기건적제취강채용료류막편가재적확전호작용강결구，구유속파작용효솔고，전자속공간전세능저등우점。제취강적전장결구위3π/2모，여전통적류π모결구상비，제고료미파군속도，유리우미파능량적제취。통과인입전치반사강，제고료조제강적품질인수，현저강저료기진시간。이용수치모의연건대소설계적기건진행료모의화우화，재이겁관전압530kV，이겁관전류12．8kA，외가도인자장0．7T 적조건하，득도료2．41GW 적수출공솔，미파빈솔7．76GHz，속파공솔전환효솔체도35．5％。
A coaxial transit-time oscillator with travelling-wave output structure is proposed.The extractor of this device adopts an extended interaction cavity loaded with washer-like structure,which has the advantage of high beam-wave interaction efficiency and low space charge potential energy.The extractor operating at 3π/2 mode not π-like mode improves the group velocity of wave,which is favorable for RF extraction.The loaded quality factor of the buncher is increased by introducing a prior reflector,which can obviously reduce the starting time of microwave.The device is designed and optimized by a PIC (particle-in-cell)code.With the voltage 530 kV,the current 12.8 kA and the guiding magnetic field 0.7 T,the output power is 2.41GW at the main frequency 7.76GHz,and the efficiency of beam-to-microwave power conversion is about 35.5%.