Improved edge charge exchange recombination spectroscopy in DIII-D

被引：65

作者：

Chrystal, C. ^{[1
]}

Burrell, K. H. ^{[2
]}

Grierson, B. A. ^{[3
]}

Haskey, S. R. ^{[3
]}

Groebner, R. J. ^{[2
]}

Kaplan, D. H. ^{[2
]}

Briesemeister, A. ^{[4
]}

机构：

[1] Oak Ridge Associated Univ, Oak Ridge, TN 37831 USA

[2] Gen Atom, POB 85608, San Diego, CA 92186 USA

[3] Princeton Plasma Phys Lab, Princeton, NJ 08543 USA

[4] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 2016年 / 87卷 / 11期

关键词：

COUPLED-DEVICE DETECTORS; D TOKAMAK; SYSTEM;

D O I：

10.1063/1.4958915

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

The charge exchange recombination spectroscopy diagnostic on the DIII-D tokamak has been upgraded with the addition of more high radial resolution view chords near the edge of the plasma (r/a > 0.8). The additional views are diagnosed with the same number of spectrometers by placing fiber optics side-by-side at the spectrometer entrance with a precise separation that avoids wavelength shifted crosstalk without the use of bandpass filters. The new views improve measurement of edge impurity parameters in steep gradient, H-mode plasmas with many different shapes. The number of edge view chords with 8 mm radial separation has increased from 16 to 38. New fused silica fibers have improved light throughput and clarify the observation of non-Gaussian spectra that suggest the ion distribution function can be non-Maxwellian in low collisionality plasmas. Published by AIP Publishing.

引用

页数：3

共 15 条

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