An experimental system for spectral line ratio measurements in the TJ-II stellarator

被引：1
|
作者：
Zurro, B. [1 ]
Baciero, A. [1 ]
Fontdecaba, J. M. [1 ]
Pelaez, R. [2 ]
Jimenez-Rey, D. [1 ]
机构：
[1] Asociac EURATOM CIEMAT, Lab Nacl Fus Confinamiento Magnet, E-28040 Madrid, Spain
[2] Univ Valladolid, Dept Fis Teor Atom & Opt, E-4701 Valladolid, Spain
来源：
REVIEW OF SCIENTIFIC INSTRUMENTS | 2008年 / 79卷 / 10期
关键词：
plasma diagnostics; plasma radiofrequency heating; stellarators; ultraviolet spectra; visible spectra;
D O I：
10.1063/1.2955637
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
The chord-integrated emissions of spectral lines have been monitored in the TJ-II stellarator by using a spectral system with time and space scanning capabilities and relative calibration over the entire UV-visible spectral range. This system has been used to study the line ratio of lines of different ionization stages of carbon (C(5+) 5290 A and C(4+) 2271 A) for plasma diagnostic purposes. The local emissivity of these ions has been reconstructed, for quasistationary profiles, by means of the inversion Fisher method described previously. The experimental line ratio is being empirically studied and in parallel a simple spectroscopic model has been developed to account for that ratio. We are investigating whether the role played by charge exchange processes with neutrals and the existence of non-Maxwellian electrons, intrinsic to Electron Cyclotron Resonance Heating (ECRH) heating, leave any distinguishable mark on this diagnostic method.
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页数：4
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