Nonlinearly driven oscillations in the gyrotron traveling-wave amplifier

作者：Chiu C C^*; Pao K F; Yan Y C; Chu K R; Barnett L R; Luhmann N C

来源：Physics of Plasmas, 2008, 15(12): 123109.

DOI：10.1063/1.3050073

• gyrotrons
• plasma nonlinear processes
• plasma oscillations
• travelling wave amplifiers
• travelling wave tubes

By delivering unprecedented power and gain, the gyrotron traveling-wave amplifier (gyro-TWT) offers great promise for advanced millimeter wave radars. However, the underlying physics of this complex nonlinear system is yet to be fully elucidated. Here, we report a new phenomenon in the form of nonlinearly driven oscillations. A zero-drive stable gyro-TWT is shown to be susceptible to a considerably reduced dynamic range at the band edge, followed by a sudden transition into driven oscillations and then a hysteresis effect. An analysis of this unexpected behavior and its physical interpretation are presented.

• 出版日期2008-12
• 单位清华大学