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Pisma v Zhurnal Tekhnicheskoi Fiziki, 2022 Volume 48, Issue 24, Pages 33–37 (Mi pjtf7469)

The first application of the HIBP diagnostics for co-NBI plasma potential measurement in the TUMAN-3M tokamak

A. A. Belokurov, G. I. Abdullina, L. G. Askinaze, N. A. Zhubr, V. A. Kornev, S. V. Lebedev, D. V. Razumenko, A. I. Smirnov, A. S. Tukachinsky, D. A. Shergin

Ioffe Institute, St. Petersburg, Russia

Abstract: The heavy ion beam probe (HIBP) diagnostics at the TUMAN-3M tokamak was updated to provide measurements in the regime with neutral beam injection co-directed with plasma current (co-NBI). By means of HIBP, plasma potential measurements in the center of plasma were carried out. Plasma potential evolution in the discharge with the LH transition (transition to the improved confinement mode) is in good agreement with the concept of negative radial electric field generation during formation of the transport barrier.

Keywords: plasma physics, tokamak, heavy ion beam probe, H-mode, neutral beam injection.

Received: 29.09.2022
Revised: 26.10.2022
Accepted: 27.10.2022

DOI: 10.21883/PJTF.2022.24.54022.19380



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