Transition of Absolute instability from global to local modes in a gyrotron traveling-wave amplifier
Transition of Absolute instability from global to local modes in a gyrotron traveling-wave amplifier
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DOI：
10.1103/physreve.74.016402
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发表时间：
2006-07
期刊：
影响因子：
--
通讯作者：
Tsun-Hsu Chang;N. Chen
中科院分区：
文献类型：
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作者：
Tsun-Hsu Chang;N. Chen
本研究系统地描述了局域绝对不稳定性及其过渡行为。从注波互作用的角度对轴向模进行了表征，轴向模与整体模具有许多共同的特征。随着分布损耗的增加，系统从全局模态向局部模态过渡.铜截面中的电子渡越角决定了反馈判据，决定了振荡的生存性。此外，使用该模型预测的振荡阈值比使用简化模型获得的振荡阈值更准确。
This study systematically characterizes the local absolute instabilities and their transitional behavior. The axial modes were characterized from the perspective of beam-wave interaction, which share many characteristics with the global modes. The transition from global modes to local modes as the distributed loss increases was demonstrated. The electron transit angle in the copper section, which determines the feedback criterion, governs the survivability of an oscillation. In addition, the oscillation thresholds predicted using this model are more accurate than those obtained using a simplified model.