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Edge Plasma Diagnostics on Tore Supra Tokamak

Tore Supra 托卡马克的边缘等离子体诊断

基本信息

批准号：
63044061
负责人：
FUJITA Junji
金额：
$ 8.83万
依托单位：
National Institute for Fusion Science (1989-1990)Nagoya University (1988)
依托单位国家：
日本
项目类别：
Grant-in-Aid for international Scientific Research
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

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-63044061/
关键词：
Tokamak Edge Plasma Electron Density Profile Plasma Diagnostics Ergodic Layer Beam Probe Spectroscopy Spectral Line Intensity Ratio Ergodic Divertor

项目摘要

Applicability of the beam probe spectroscopy to the edge plasms diagnostics on the Tore Supra tokamak in Cadarache, France, has been investigated. It is expected that electron density as high as 10^<14> cm^<-3> will be produced by operating an ergodic divertor in edge part of Tore Supra, and a diagnostic technique which could measure such high density with spatial resolution as high as 1cm is required to be developed. The beam probe spectroscopy which has originally been developed in our research group utilizes various atomic and radiative processes between plasma particles and beam atoms injected, and is used for plasma diagnostics. It has been found through the discussion with research group in Cadarache that the use of neutral lithium beam originally planned is not proper for such a high electron density measurement because of strong attenuation of the beam injected, but the measurement of the intensity ratio of two spectral lines corresponding to different transitions from the neutral hydrogen or helium beam injected into the plasma will give an electron density profile, since the intensity ratio is a function of local electron density. It is, however, necessary to prepare the light detection system in the Vacuum Ultraviolet region. In the case of using hydrogen, an existing diagnostic beam of hydrogen on Tore Supra could be utilized, but it will be necessary to prepare a new diagnostic beam for helium. A doped beam of helium in the existing hydrogen diagnostic beam would also be applicable. A design of the diagnostic system for electron density profile in the Tore Supra edge plasma is going to be completed.

本文研究了束流探针光谱学在法国卡达拉什Tore Supra托卡马克边缘闪烁诊断中的适用性。通过<14><-3>运行Tore Supra边缘部分的各态历经偏滤器，预计将产生高达10^ cm^的电子密度，并且需要开发一种能够以高达1cm的空间分辨率测量如此高密度的诊断技术。束探针光谱学最初是在我们的研究小组开发的，它利用了等离子体粒子和注入的束原子之间的各种原子和辐射过程，并用于等离子体诊断。通过与Cadarache研究组的讨论发现，由于注入束的强烈衰减，原计划使用中性锂束不适合于如此高的电子密度测量，但测量注入等离子体的中性氢或氦束的不同跃迁对应的两条谱线的强度比将给出电子密度分布，因为强度比是局部电子密度的函数。然而，有必要在真空紫外区制备光检测系统。在使用氢的情况下，可以利用Tore Supra上现有的氢诊断束，但有必要准备新的氦诊断束。现有氢诊断束中的掺杂氦束也适用。完成了Tore Supra边缘等离子体电子密度分布诊断系统的设计。