2023•Unpublished venueOpen access
PLASMA PROFILES, SELF-ORGANIZATION AND ALFVEN EIGENMODES STUDIES USING THE HIBP DIAGNOSTIC IN THE TJ-II STELLARATOR
L. I. Krupnik, J.M. Barcala, Á. Cappa, O.O. Chmyga, M. Dreval, C. Hidalgo, S. M. Khrebtov, O.D. Komarov, O.S. Kozachok, J. Martínez-Fernández, Antonio Molinero, Jose Luis De Pablos, TJ two team
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Abstract
This paper reports recent experiments in the TJ-II stellarator using a dual Heavy Ion Beam probe diagnostic. The studies were focused on characterizing plasma potential profiles, investigating self-organization mechanisms and Alfven Eigenmodes (AEs). Results showed plasma equipotential measurements consistent with vacuum magnetic surfaces and the presence of zonal flows in the plasma core region. The investigation of Alfven Eigen modes showed their radial localization and poloidal asymmetries in potential and density fluctuations driven by AEs.
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