Contribution of Ne ions to radiation enhancement in JT-60U divertor plasmas

被引：22

作者：

Nakano, T. ^{[1
]}

Asakura, N. ^{[1
]}

Kubo, H. ^{[1
]}

机构：

[1] Japan Atom Energy Agcy, Naka, Ibaraki 3110193, Japan

来源：

JOURNAL OF NUCLEAR MATERIALS | 2013年 / 438卷

关键词：

HIGH-DENSITY; HIGH-PERFORMANCE; DISCHARGES; SPECTROSCOPY; CONFINEMENT;

D O I：

10.1016/j.jnucmat.2013.01.049

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The emission spectra from Ne seeded divertor plasmas of JT-60U are measured by an absolutely calibrated vacuum ultraviolet spectrometer and analyzed with a collisional-radiative model. The radiative power of Ne ions from the inner divertor plasma in the detached phase contributes 55% of the total radiative power while that in the attached phase contributes 34% even at a similar Ne seeding rate. From an analysis of the intensity ratios of Ne VIII spectral lines, it is found that volume recombination of Ne IX to Ne VIII occurs more frequently in the detached plasma, enhancing Ne VIII density. This is one of the leading processes that enhances the radiative power from highly charged Ne ions in the detached plasma. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：S291 / S296

页数：6

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