Development of Medium Power, High Quality, Submillimeter Wave Gyrotron and Its Application to Plasma Measurement

中功率、高质量亚毫米波回旋管的研制及其在等离子体测量中的应用

基本信息

批准号：
03045023
负责人：
IDEHARA Toshitaka
金额：
$ 3.2万
依托单位：
Fukui University
依托单位国家：
日本
项目类别：
Grant-in-Aid for international Scientific Research
财政年份：
1991
资助国家：
日本
起止时间：
1991 至 1993
项目状态：
已结题

项目摘要

Objectives of the project are as follows, 1. Development of medium power, high quality, submillimeter wave gyrotron, and 2. Its application to plasma scattering measurement as a submillimeter wave source.Main results obtained through the term (1991-1993) are as follows,1. Development of high frequency gyrotron using the second and the third harmonic operationsHigh frequency, submillimeter wave gyrotrons are developed in both universities using 12 T superconducting magnets. In Fukui, a frequency tunable gyrotron (GYROTRON FU III) up to 636 GHz is realized by the fundamental, the second and the third harmonics of electron cyclotron resonance. Output powers are several hundred watts. In Sydney, a frequency tunability from 150 GHz to 615 GHz is attained by introducing the second harmonic operation developed in Fukui.The gyrotron has a important advantage of continuous operation, while output power is low, that is, several milliwatt to several ten watts.2. Long pulse operation of a submilli … More meter wave gyrotronGyrotrons in Fukui are pulsed. Long pulse operation is necessary for its application to plasma scattering measurement. Using GYROTRON FU II, 0.6 msec, TE_<161> mode operation at the second harmonic (frequency is 352 GHz) has been achieved. The output power is 150 W, which is applicable to plasma measurement as a power source.3. Amplitude modulation and frequency modulation of a submillimeter wave gyrotronBoth modulations of a gyrotron are important for its application to wider fields. Such modulations have been achieved by modulating anode voltage and cathode voltage of electron gun, respectively.4. Mode competition and cooperation between the fundamental and the second harmonic operationsSingle mode operations at the second harmonic which are necessary for development of high frequency gyrotron have been achieved by suppressing mode competition with the fundamental operations. On the other hand, under some operation condition, the second harmonic operation triggers a fundamental operation (a kind of mode cooperation). As the results, a starting current of the fundamental decreases and total energy extracted from the electron beam increases.5. Plasma scattering measurement using a gyrotron as a power sourceUsing GYROTRON FU II as a submillimeter wave source, a scattering measurement of a drift wave in CHS device is successfully done under collaboration with National Institute of Fusion Science. In Sydney, a scattering measurement of Alfven wave in TORTUS Tokamak is also done in the plasma heating experiment. Less

该项目的目标如下，1。中等力量，高质量，亚亚略加循环和2。等离子体散射测量作为亚亚毫米表波源。尽管术语（1991- 1993年）获得的梅恩结果如下，如下所示，1使用秒数的高频循环频率在两个大学中使用了12 t超导磁体。 GHz是通过在福生中引入的第二个谐波操作来实现的。陀螺仪具有连续操作的重要优势，而输出功率则很低，严重性至严重性十瓦对于使用陀螺仪FU II，0.6毫秒，TE_ <161>模式的操作（频率为352 GHz）的Eutput功率为150 W 。随着驯服的操作。 CHS的漂移波在与国家融合学院合作下成功进行了，在等离子体加热实验中也进行了tortus tokamak的散射测量