强激光与粒子束2017，Vol.29Issue(6)：12-15,4.DOI:10.11884/HPLPB201729.170038
相对论返波管中击穿现象粒子模拟
Particle-in-cell simulation of field breakdown in a relativistic backward wave oscillator
摘要
Abstract
With the increase of output microwave power,the internal field breakdown in a relativistic backward-wave oscillator (RBWO) gets gradually severe.The plasma generated by the field breakdown would lower the attainable output power and pulse width,which greatly limits the single pulse energy.Using a 3-dimensional particle-in-cell (PIC) simulation,the models involving single or several spot breakdown in the reflector,extractor and slow wave structure are built.The plasma effects existing in different locations or having different density are recognized.As demonstrated in the simulation,the output microwave power decreases rapidly as the plasma density increases,breakdown simultaneously occurring at several locations would result in pulse shortening more intensely in contrast to a single spot breakdown,and the easiest plasma effect exists in the breakdown of the reflector.关键词
相对论返波管/击穿/等离子体/粒子模拟Key words
relativistic backward wave oscillator/breakdown/plasma/PIC simulation分类
信息技术与安全科学引用本文复制引用
李姝敏,李永东,刘震..相对论返波管中击穿现象粒子模拟[J].强激光与粒子束,2017,29(6):12-15,4.基金项目
国家自然科学基金面上项目(U1530133) （U1530133）
高功率微波技术重点实验室基金项目 （）
