Conversion of Submillimeter Wave Gyrotrn Output into a high Quality Beam and its Application to Plasme Scattering Measurement

亚毫米波陀螺输出转换为高质量光束及其在等离子体散射测量中的应用

基本信息

批准号：
06680441
负责人：
OGAWA Isamu
金额：
$ 1.34万
依托单位：
FUKUI UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1994
资助国家：
日本
起止时间：
1994 至 1995
项目状态：
已结题

项目摘要

Objectives : Production of high quality, intense submillimeter wave beam and its application to plasma scattering measurement with the aim of improving performance of the measurement (S/N ratio, spatial and wave number resolutions)The results :1. Development of a high frequency gyrotron as intense power source in submillimeter wave rangeA high frequency gyrotron in the submillimeter wavelength range using 17 T superconducting magnet has been designed and constructed. Experimental results have demonstrated operation from 158 to 443 GHz at the fundamental and from 336 to 838 GHz at the second harmonic. A submillimeter wave gyrotron can also produce steady outputs in a long pulse (P=110 W,power fluctuation level<8%, f=354 GHz, tau-0.6s) by closely adjusting the operation parameters.2. Development of quasi-optical transmission line for producing a high quality beamA new transmission line is designed for converting gyrotron output into a high quality beam. This consists of a quasi-optical antenna, mirrors and polarizer. Analysis using the Huygens equation supports that this system can produce a high quality beam. There is no sidelobe of more than-30 dB.Most of the power (83%) of the image source is transferred to beam center.3. Plasma scattering measurement using a submillimeter wave gyotron as a power sourceIn order to obseve low frequency density fluctuations in the CHS (Compact Helical System) plasma, a plasma scattering measurement using a submillimeter wave gyrotron as a power source is carried out in ICRF heated plasmas. The results correspond to those of reflectmetry with frequency of 39 GHz. The final goal is to apply a high quality, high intensity beam in the submillimeter wave range to scattering measurements with the aim of improving performance of the measurement (S/N ratio, spatial and wave number resolutions).

目的：高质量，激烈的亚毫米波梁及其在血浆散射测量中的应用，目的是提高测量的性能（S/N比，空间和波数分辨率）：1。使用17 t超导磁铁的高频波朗格（Esmillimimeter Wave）高频陀螺仪中的高频循环发育是在亚毫升波rangea高频陀螺仪中的开发。实验结果表明，基本的基本运行量从158至443 GHz，第二次谐波在336至838 GHz。亚毫升波循环也可以通过紧密调整操作参数2。用于生产高质量Beama新传输线的准光学传输线的开发旨在将陀螺仪输出转换为高质量的光束。这由准光天线，镜像和偏振器组成。使用Huygens方程的分析支持该系统可以产生高质量的光束。没有超过30 dB的位置。图像源的大部分功率（83％）都转移到梁中心3。血浆散射测量使用亚毫米表波陀螺数作为电源源命令，以在CHS（紧凑型螺旋系统）等离子体中观察低频密度波动，这是使用sibslimighimimeter波旋转子作为ICRF热血浆中的电源源作为电源表的血浆散射测量。结果对应于39 GHz频率的反射仪。最终目标是将高质量的高强度光束应用于散射测量值，以改善测量的性能（S/N比，空间和波数分辨率）。