title: Preparations for the motional Stark effect diagnostic on EAST.
abstract: 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.
authors.affiliation: Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, China.
authors.forename: J
authors.initials: J
authors.lastname: Fu
authors.affiliation: Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, China.
authors.forename: Y Y
authors.initials: YY
authors.lastname: Li
authors.affiliation: Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, China.
authors.forename: B
authors.initials: B
authors.lastname: Lyu
authors.affiliation: Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, China.
authors.forename: P
authors.initials: P
authors.lastname: Sheng
authors.affiliation: School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, Anhui 230026, China.
authors.forename: Y
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, Anhui 230026, China.
authors.forename: X H
authors.initials: XH
authors.lastname: Yin
authors.affiliation: School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, Anhui 230026, China.
authors.forename: Y J
authors.initials: YJ
authors.lastname: Shi
authors.affiliation: School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, Anhui 230026, China.
authors.forename: Y
authors.initials: Y
authors.lastname: Yu
authors.affiliation: School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, Anhui 230026, China.
authors.forename: M Y
authors.initials: MY
authors.lastname: Ye
authors.affiliation: Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, China.
authors.forename: B N
authors.initials: BN
authors.lastname: Wan