Edge Radial Electric Field in Positive and Negative Triangularity Plasmas in the TCV Tokamak
Year: 2025
Type: preprint
Abstract: We present the first edge $E_r$ measurements in negative triangularity (NT) TCV plasmas. The Doppler backscattering measurements of $v_\perp \approx E_r/B$ reveal a significant impact of triangularity on the $E_r$ well: In Ohmic, NBI, and ECRH heated discharges, the $E_r$ well and associated $E_r \times B$ shear are stronger in NT-shaped plasmas compared to their positive triangularity (PT) counterpart. This suggests a connection to the concomitant NT performance gain relative to PT L-mode.
Source: arXiv (Cornell University)
Authors: Rienäcker, S., Hennequin, P., Vermare, L., Honoré, C., Bouffet-Klein, R., Coda, S., Labit, B., Vincent, B., Thome, K. E., Krutkin, O., Balestri, A., Nakeva, Y., team, the TCV
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W6979351093
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