权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

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

本项目的目标如下：1。中功率、高质量亚毫米波回旋管的研制。本论文的主要工作包括：1.等离子体散射测量。利用二次和三次谐波操作的高频回旋管的研制两所大学都研制了使用12 T超导磁体的高频亚毫米波回旋管。在福井，利用电子回旋共振的基波、二次谐波和三次谐波，实现了频率高达636 GHz的可调谐回旋管（GYROTRON FU III）。输出功率为几百瓦。在悉尼，通过引入福井开发的二次谐波操作，获得了150 GHz到615 GHz的频率调谐度。回旋管具有连续工作的重要优点，而输出功率很低，即几毫瓦到几十瓦。亚毫米波长脉冲工作 ...更多信息福井的回旋管是脉冲式的。长脉冲工作是其应用于等离子体散射测量的必要条件。使用GYROTRON FU II，0.6毫秒，<161>实现了二次谐波（频率为352 GHz）的TE模式操作。输出功率为150 W，适合作为等离子体测量的电源.亚毫米波回旋管的振幅调制和频率调制这两种调制方式对回旋管的应用具有重要意义。这种调制是通过分别调制电子枪的阳极电压和阴极电压来实现的.基波与二次谐波之间的模式竞争与合作通过抑制基波模式竞争，实现了发展高频回旋管所必需的二次谐波单模运转。另一方面，在某些操作条件下，二次谐波操作触发基波操作（一种模式合作）。结果，基波的启动电流减小，从电子束中提取的总能量增加。5.利用回旋管作为电源的等离子体散射测量与国立聚变科学研究所合作，利用GYROTRON FU II作为亚毫米波源，成功地测量了CHS装置中漂移波的散射。在悉尼的等离子体加热实验中，还对TORTUS托卡马克中的阿尔芬波进行了散射测量。少