Measurements of the internal magnetic field using the B-Stark motional Stark effect diagnostic on DIII-D (inivited)

被引：19

作者：

Pablant, N. A. ^{[1
]}

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

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

Holcomb, C. T. ^{[3
]}

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

机构：

[1] Univ Calif San Diego, La Jolla, CA 92093 USA

[2] Gen Atom Co, San Diego, CA 92186 USA

[3] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 2010年 / 81卷 / 10期

关键词：

EXCHANGE RECOMBINATION SPECTROSCOPY; RADIAL ELECTRIC-FIELD; ITER; RECONSTRUCTION; PROFILES;

D O I：

10.1063/1.3491209

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Results are presented from the B-Stark diagnostic installed on the DIII-D tokamak. This diagnostic provides measurements of the magnitude and direction of the internal magnetic field. The B-Stark system is a version of a motional Stark effect (MSE) diagnostic based on the relative line intensities and spacing of the Stark split D-alpha emission from injected neutral beams. This technique may have advantages over MSE polarimetry based diagnostics in future devices, such as the ITER. The B-Stark diagnostic technique and calibration procedures are discussed. The system is shown to provide accurate measurements of B-theta/B-T and vertical bar B vertical bar over a range of plasma conditions. Measurements have been made with toroidal fields in the range of 1.2-2.1 T, plasma currents in the range 0.5-2.0 MA, densities between 1.7 and 9.0 X 10(19) m(-3), and neutral beam voltages between 50 and 81 keV. The viewing direction and polarization dependent transmission properties of the collection optics are found using an in situ beam into gas calibration. These results are compared to values found from plasma equilibrium reconstructions and the MSE polarimetry system on DIII-D. (C) 2010 American Institute of Physics. [doi:10.1063/1.3491209]

引用

页数：7

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