Soane Alexander V, Shapiro Michael A, Jawla Sudheer, Temkin Richard J
Plasma Science and Fusion Center, Massachusetts Institute of Technology, Cambridge, MA. 02139.
IEEE Trans Plasma Sci IEEE Nucl Plasma Sci Soc. 2017 Oct;45(10):2835-2840. doi: 10.1109/TPS.2017.2740619. Epub 2017 Oct 5.
The design and experimental results of a 140 GHz gyro-amplifier that uses a dielectric-loaded, sever-less confocal waveguide are presented. The gyro-traveling wave amplifier uses the mode of a confocal geometry with power coupled in and out of the structure with Vlasov-type, quasi-optical couplers. Dielectric loading attached to the side of the confocal structure suppresses unwanted modes allowing zero-drive stable operation at 48 kV and 3A of beam current. The confocal gyro-amplifier demonstrated a peak circuit gain of 35 dB, a bandwidth of 1.2 GHz and a peak output power of 550 W at 140.0 GHz.
本文介绍了一种采用介质加载、无隔断共焦波导的140GHz回旋行波管放大器的设计及实验结果。该回旋行波管放大器利用共焦结构的模式，通过弗拉索夫型准光耦合器实现功率进出结构的耦合。附着在共焦结构侧面的介质加载抑制了不需要的模式，使得在48kV和3A束流条件下能够实现零驱动稳定运行。该共焦回旋行波管放大器在140.0GHz时实现了35dB的峰值电路增益、1.2GHz的带宽以及550W的峰值输出功率。
