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Studies on Frequency Tunable High Power Submillimeter Wave Source.

频率可调谐高功率亚毫米波源的研究。

基本信息

批准号：
63400002
负责人：
ONO Shoichi
金额：
$ 13.57万
依托单位：
Tohoku University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (A)
财政年份：
1988
资助国家：
日本
起止时间：
1988 至 1990
项目状态：
已结题

项目摘要

High power millimeter wave tubes are great important devices in fusion plasma researches for the electron cyclotron resonance heating and plasma diagonostics. The development of tube with shorter wavelength up to submillimeter wave range and wide band frequency tunability is especially required in large fusion devices. This project is focussed to investigate the backward wave operation for the frequency tunability and the harmonic cyclotron operation for the shorter wavelength generation in the peniotron tube with a high conversion efficiency. We have designed and fabricated several test tubes to investigate experimentally above capabilities in future peniotron development. Research results in this project are as follows.1. The electronic efficiency of 72% was experimentally obtained in the auto-resonant peniotron test tube. The value of efficiency is the highest in the cyclotron fast wave tube.2. The continuous frequency tuning with wide band ranging from 8 to 12GHz was obtained in the backward wave peniotron test tube. The result is the first experimental investigation in the cyclotron fast wave tube.3. The 2nd cyclotron harmonic operation was first demonstrated in the high cyclotron harmonic peniotron test tube and the experiments are still continuing to investigate higher efficiency operation at the high cyclotron harmonics.4. A short millimeter wave test tube was designed and fabricated to extend the frequency range to 100GHz. Experiments will be started at the beginning in 1991.

大功率毫米波管是聚变等离子体研究中电子回旋共振加热和等离子体诊断的重要器件。在大型核聚变装置中，尤其需要开发波长更短、可达亚毫米波范围和宽带频率可调性的管。本课题主要研究频率可调性的反向波操作和转换效率高的短波长产生的谐波回旋操作。我们已经设计和制造了几个试管，以实验研究上述能力，在未来的回旋加速器的发展。本课题的研究成果如下：在自共振质子管实验中获得了72%的电子效率。在回旋加速器快波管中效率值最高。在后向波回旋试管中获得了8 ~ 12GHz的宽带连续频率调谐。这是在回旋快波管中首次进行的实验研究。第二次回旋谐波操作首次在高回旋谐波加速器试管中被证明，并且实验仍在继续探索在高回旋谐波下更高效率的操作。设计并制作了一种短波毫米波试管，将频率范围扩展到100GHz。试验将于1991年初开始。