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 Å line

L. K. Huang*, M. Finkenthal, D. Wróblewski, H. W. Moos, W. P. West, D. M. Thomas, M. P. Thomas, X. Z. Yang, P. E. Phillips, A. J. Wootton, Roger D. Bengtson, J. A. Boedo, R. V. Bravenec, J. Y. Chen, G. Cima, K. W. Gentle, S. C. McCool, B. U. Richards, W. L. Rowan, D. C. SingK. W. Wenzel

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

Analysis of the circular polarization of the Li I 6708 Å 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 (1981)]. Determined from the measured magnetic field, the safety factor on the magnetic axis during Ohmically heated sawtoothing discharges is near unity.

Original languageEnglish
Pages (from-to)809-814
Number of pages6
JournalPhysics of Fluids B
Volume2
Issue number4
DOIs
StatePublished - 1990

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