The First Application of the HIBP Diagnostics for co-NBI Plasma Potential Measurement in the TUMAN-3M Tokamak

• Published in: Technical physics letters Vol. 49; no. 12; pp. 220 - 224
• Main Authors: Belokurov, A. A., Abdullina, G. I., Askinazi, L. G., Zhubr, N. A., Kornev, V. A., Lebedev, S. V., Razumenko, D. V., Smirnov, A. I., Tukachinskiy, A. S., Shergin, D. A.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01-12-2023; Springer Nature B.V
• Subjects: Beam injection; Classical and Continuum Physics; Electric fields; Heavy ions; Ion beams; Neutral beams; Physics; Physics and Astronomy; Plasma currents; Tokamak devices; tokamak; H-mode; neutral beam injection; plasma physics; heavy ion beam probe
• ISSN: 1063-7850; 1090-6533
• DOI: 10.1134/S106378502390008X

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.