Open AccessRadial structure of quasi-coherent mode in ohmic plasma of the T-10 tokamak
Author(s) -
M. A. Drabinskiy,
L.G. Eliseev,
P.O. Khabanov,
A. V. Melnikov,
N. K. Kharchev,
N. S. Sergeev,
S.A. Grashin
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1383/1/012004
Subject(s) - physics , tokamak , ohmic contact , plasma , atomic physics , langmuir probe , amplitude , plasma diagnostics , ion , plasma oscillation , optics , nuclear physics , quantum mechanics , electrode
The paper presents the recent results from the quasi-coherent (QC) mode studies performed in the ohmic plasma of the T-10 tokamak ( R = 1.5 m. a = 0.3 m, B 0 = 2.2 T, I pl = 230 kA, and n e ≈ 1⋅10 19 m −3 ) using Heavy Ion Beam Probe diagnostics (HIBP). The radial distribution of the amplitude of the density perturbations caused by the QC-mode has two pronounced peaks (approximately 5 and 1.5 % at radii of 25–30 and 8–14 cm, respectively) with an intermediate zone of lower amplitude in between them (<1% at radii of 16–21 cm). The mean QC-mode frequency remains nearly constant within the studied region (75–80 kHz). For the edge plasma, the HIBP observations were confirmed by the Langmuir probe measurements.