磁绝缘线振荡器的起振电压与注入电压关系的分析

粒子模拟和实验研究发现磁绝缘线振荡器(MILO)的起振电压会随注入工作电压的增大而增大, 通过进一步的分析与研究, 找到了引起该现象的根本原因, 即随着注入工作电压的增大, 工作电压上升前沿的斜率必然增大, 上升前沿斜率的增大必然引起起振电压的增大, 当斜率无限大时, MILO的起振电压等于工作电压. 因此, 工作电压上升前沿斜率的变化是引起MILO器件起振点变化的根本原因; 当注入电压上升沿的斜率固定不变时, 同一MILO器件的起振点不变, 即对应的起振电压值不变; 当注入电压上升沿的斜率增大时, 同一MILO器件的起振点对应的起振电压值随之增大. 对MILO器件的自磁绝缘临界电流公式进行了部分修正.关键词：磁绝缘线振荡器工作电压起振电压工作曲线

Relation analysis between starting voltage and input voltage for a magneticaly insulated linear oscillator

Resorting to particle-in-cell (PIC), simulation and experimental investigation, the phenomenon is observed that the starting voltage increases with the increase of input operation voltage of a magnetically insulated transmission linear oscillator (MILO). Therefore, PIC simulation and theoretical analysis are carried out for further study. The key factor responsible for the phenomenon is found, that is, the bigger the operation voltage and the bigger the rise slope of the operation voltage is, and the bigger the starting voltage is; when the rise slope of the operation voltage is infinite, the starting voltage is equal to the operation voltage. Therefore, the variation of the rise slope of the input voltage is the key factor that causes the variation of the starting spot for an MILO; when there is no change of the rise slope of the voltage, the starting spot for the same MILO will not change, and the starting voltage will not change either; when there is the increase of the rise slope of the input voltage, the starting voltage for the same MILO will increase accordingly. In addition, the expression of the self-insulating critical current for an MILO is modified partly.