Accurate Determination of Iron Density in Large Helical Device Based on Absolute Intensity Profile Measurement of Extreme Ultraviolet Spectral Lines

被引：3

作者：

Dong, Chunfeng ^{[1
]}

Morita, Shigeru ^{[1
,2
]}

Goto, Motoshi ^{[1
,2
]}

Wang, Erhui ^{[1
]}

Murakami, Izumi ^{[2
]}

Yamamoto, Norimasa ^{[2
]}

机构：

[1] Grad Univ Adv Studies, Dept Fus Sci, Toki, Gifu 5095292, Japan

[2] Natl Inst Nat Sci, Natl Inst Fus Sci, Toki, Gifu 5095292, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS | 2012年 / 51卷 / 01期

关键词：

FE XIII; TRANSPORT; PLASMAS;

D O I：

10.1143/JJAP.51.010205

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

An iron density profile is accurately determined in Large Helical Device (LHD) using a space-resolved extreme ultraviolet (EUV) spectrometer, the absolute intensity calibration of which is carried out by bremsstrahlung continuum measurement. The effective intensity coefficients R (eV cm(3) s(-1)) of FeXV to FeXXIV are precisely calculated on the basis of a collisional-radiative model for iron density determination. The total iron density at the plasma center is found to be almost 4 or 5 orders of magnitude smaller than the electron density. The application of the present result to the study of impurity transport demonstrates a new way of examining the radial structure of transport coefficients and of determining the total impurity density. (C) 2012 The Japan Society of Applied Physics

引用

页数：3

共 8 条

[1] Space-resolved extreme ultraviolet spectrometer for impurity emission profile measurement in Large Helical Device
Dong, Chunfeng
Morita, Shigeru
Goto, Motoshi
Zhou, Hangyu
REVIEW OF SCIENTIFIC INSTRUMENTS, 2010, 81 (03):
[2] Electron density dependence of intensity ratio for FeXXII extreme ultraviolet emission lines arising from different ground levels in electron beam ion trap and large helical device
Sakaue, H. A.
Yamamoto, N.
Morita, S.
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Chen, C.
Kato, D.
Kikuchi, H.
Murakami, I.
Ohtani, S.
Tanuma, H.
Watanabe, T.
Tawara, H.
JOURNAL OF APPLIED PHYSICS, 2011, 109 (07)
[3] Absolute intensity calibration of flat-field space-resolved extreme ultraviolet spectrometer using radial profiles of visible and extreme ultraviolet bremsstrahlung continuum emitted from high-density plasmas in Large Helical Device
Dong, Chunfeng
Morita, Shigeru
Goto, Motoshi
Wang, Erhui
REVIEW OF SCIENTIFIC INSTRUMENTS, 2011, 82 (11):
[4] CO2 laser polarimeter for electron density profile measurement on the Large Helical Device
Akiyama, T
Tsuji-Iio, S
Shimada, R
Nakayama, K
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Terai, K
Tanaka, K
Tokuzawa, T
Kawahata, K
REVIEW OF SCIENTIFIC INSTRUMENTS, 2003, 74 (05): : 2695 - 2703
[5] Electron density profile measurement using an ultrashort-pulsed radar reflectometer on large helical device
Kaneba, T
Tokuzawa, T
Kawahata, K
Ito, Y
Nagayama, Y
REVIEW OF SCIENTIFIC INSTRUMENTS, 2004, 75 (10): : 3846 - 3848
[6] Investigation on Total Bremsstrahlung Radiation in High-Density Operation of Large Helical Device Based on Visible Bremsstrahlung Profile Measurement
Zhou, Hangyu
Morita, Shigeru
Goto, Motoshi
Dong, Chunfeng
JAPANESE JOURNAL OF APPLIED PHYSICS, 2010, 49 (10) : 1061031 - 1061038
[7] Up-down asymmetry measurement of tungsten distribution in large helical device using two extreme ultraviolet (EUV) spectrometers
Liu, Y.
Morita, S.
Huang, X. L.
Oishi, T.
Goto, M.
Zhang, H. M.
REVIEW OF SCIENTIFIC INSTRUMENTS, 2016, 87 (11):
[8] Two-dimensional measurement of edge impurity emissions using space-resolved extreme ultraviolet spectrometer in Large Helical Device
Wang, Erhui
Morita, Shigeru
Goto, Motoshi
Dong, Chunfeng
REVIEW OF SCIENTIFIC INSTRUMENTS, 2012, 83 (04):

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