Safety Factor On The Axis Of A Tokamak During Ohmically Heated Sawtoothing Discharges From A Localized Measurement Of Circular-Polarization Of The Li-I-6708-A-Line

L K Huang,M Finkenthal,D Wroblewski,H W Moos, W P West,D M Thomas,M Thomas, X Z Yang,P E Phillips,A J Wootton,Roger Bengtson,J A Boedo,R V Bravenec,J Y Chen,G Cima,K W Gentle,S C Mccool,B Richards,William L Rowan,D C Sing,K W Wenzel

PHYSICS OF FLUIDS B-PLASMA PHYSICS（1990）

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Abstract

Analysis of the circular polarization of the Lii 6708 A line emitted from a monoenergetic lithium beam provides a spatially resolved measurement of the poloidal magnetic field on the Texas experimental tokamak [Nucl. Technol. Fusion 1, 479 (1989)]. Determined from the measured magnetic field, the safety factor on the magnetic axis during Ohmically heated sawtoothing discharges is near unity.

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Key words

magnetic field,safety factor,circular polarization,oscillations,joule heating

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