Preparations for the motional Stark effect diagnostic on EAST

Journal Article · Sat Nov 15 00:00:00 EST 2014 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4893996· OSTI ID:22303685

Fu, J.; Li, Y. Y.; Sheng, P.; Wan, B. N. ^[1]; Zhang, Y.; Yin, X. H.; Yu, Y.; Ye, M. Y. ^[2]; Shi, Y. J. ^[2]

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1. Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031 (China)
2. School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, Anhui 230026 (China)

Measurement and control of the current profile is essential for high performance and steady state operation of Experimental Advanced Superconducting Tokamak (EAST). For this purpose, a conventional Motional Stark Effect (MSE) diagnostics utilizing photoelastic modulators is proposed and investigated. The pilot experiment includes one channel to verify the feasibility of MSE, whose sightline intersects with Neutral Beam Injection at major radius of R = 2.12 m. A beam splitter is adopted for simultaneous measurements of Stark multiplets and their polarization directions. A simplified simulation code was also developed to explore the Stark splitting spectra. Finally, the filter is optimized based on the viewing geometry and neutral beam parameters.

• OSTI ID: 22303685
• Journal Information: Review of Scientific Instruments, Vol. 85, Issue 11; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BEAM INJECTION
CONTROL
HT-7U TOKAMAK
MULTIPLETS
POLARIZATION
SIMULATION
SPECTRA
STARK EFFECT
STEADY-STATE CONDITIONS