Development of New Steady State Plasma Source with High Heat Flux Using Wave Heating

利用波加热开发新型高热通量稳态等离子体源

基本信息

批准号：
03558003
负责人：
TAKAMURA Shuichi
金额：
$ 8.64万
依托单位：
Nagoya University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research (B)
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

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-03558003/
关键词：
Divertor-Plasma Simulator Wave Heating Whistler Wave Heating Plasma Heat Flow Fusion Ion Cyclotron Wave Heating Fluid-Code Simulation Plasma-Wall Interaction ホイッスラー波加熱ダイバータプラズマ NAGDIS-I プラズマ源プラズマ-壁相互作用ダイバ-タ

项目摘要

(1) Plasmsa heat flux to the target plate in the wide density region below 10^<19>m^<-3> was measured with the calorimetric measurement and the radiation thermometer. The thoretical heat flux was estimated from the experimental values of the electron density and temperature, and the plasma potential. From these measurement it is concluded that the plasma heat flux is strongly related with the ion reflection.(2) The propagation and absorption of excited waves was calculated theoretically and compared with the experimental observation. The observed dispersion of the excited waves is consistent with the whistler wave but the damping length along the magnetic field is much shorter than the theoretical one.(2) High density plasma around 10^<19>m^<-3> is obtained stably by the pulse discharge.(3) Characteristics of the wave heating in NAGDIS-I was studied using B2 code. In the high neutral pressure region, the wave power is mainly used to ionize the neutral particles. Cosequently the electron density increases drastically and ion temperature rises by the enhancement of the electron-ion energy transfer.(4) Electron temperature measurement using HeI intensity ratio in the plasma with hot electron was studied. In oder to apply this method in the density region below 10^<19>m^<-3>, HeI intensity ratio was calculated by collisional radiative model and the modification of HeI intensity ratio by the presence of the hot electrons was shown.

(1)利用量热测量和辐射温度计测量在低于10^19m^-3的宽密度区域中到达靶板的等离子体热通量。理论热通量是根据电子密度和温度以及等离子体电势的实验值估算的。从这些测量结果可以看出，等离子体热通量与离子反射密切相关。(2)对激发波的传播和吸收进行了理论计算，并与实验观察进行了比较。观察到的激发波色散与哨声波一致，但沿磁场的阻尼长度比理论阻尼长度短得多。(2)稳定获得了10^<19>m^-3>左右的高密度等离子体(3)利用B2代码研究了NAGDIS-I波加热特性。在高中性压力区，波能主要用于电离中性粒子。由于电子-离子能量转移的增强，电子密度急剧增加，离子温度升高。(4)研究了热电子等离子体中HeI强度比的电子温度测量。为了将该方法应用于低于10^19m^-3>的密度区域，通过碰撞辐射模型计算HeI强度比，并显示了热电子的存在对HeI强度比的修改。