Advances in Low-Temperature Tungsten Spectroscopy Capability to Quantify DIII-D Divertor Erosion

被引：27

作者：

Abrams, Tyler ^{[1
]}

Thomas, Daniel M. ^{[1
]}

Unterberg, Ezekial A. ^{[2
]}

Briesemeister, Alexis R. ^{[2
]}

机构：

[1] Gen Atom Co, San Diego, CA 92121 USA

[2] Oak Ridge Natl Lab, Oak Ridge, TN 37830 USA

来源：

IEEE TRANSACTIONS ON PLASMA SCIENCE | 2018年 / 46卷 / 05期

关键词：

Optical spectroscopy; plasma diagnostics; plasma-material interactions (PMIs); tokamaks; tungsten; ITER-LIKE WALL; COMPONENTS; UPGRADE; JET;

D O I：

10.1109/TPS.2018.2797691

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

Recent emphasis of tungsten (W) plasma-material interaction experiments on DIII-D has made it essential to enhance the W I and W II measurement capabilities of its spectroscopy diagnostic suite to acquire W sourcing measurements with high temporal, spatial, and wavelength resolution. To this end, four new viewing chords for the multichordal divertor spectrometer and divertor filterscope systems were installed, leading to a 7x increase in blue-light sensitivity. W I and low-Z impurity line identifications were performed in the 3995-4030 angstrom region, placing wavelengths within 0.1 angstrom of the National Institute of Standards and Technology values. A novel method was also developed for the DIII-D high-temporal resolution filterscopes to distinguish between W I light and background contamination, important due to the relatively weak intensity of this line, using two different bandpass filters with different widths but the same center wavelength. Finally, fast imaging of the W I 4008.75 angstrom spectral line with a PCO Pixelfly VGA 200/205 camera is allowed for discrimination between intra-edge-localized mode (ELM) and inter-ELM W I emission profiles with very high (similar to 1 mm) spatial resolution.

引用

页码：1298 / 1305

页数：8

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