In:
Plasma Physics Reports, Pleiades Publishing Ltd, Vol. 49, No. 4 ( 2023-04), p. 403-418
Abstract:
NBI-assisted plasma heating with one or two injectors of fast neutral atoms was studied at the Globus-M2 spherical tokamak at the toroidal magnetic fields of 0.8–0.9 T and plasma currents of 0.35–0.4 MA. Measurements of the spatial temperature and electron density distributions, performed using the Thomson scattering diagnostics, showed a twofold increase in heating of plasma electrons during the injection of neutral particles with energies of up to 45 keV at the beam power of 0.75 MW, as compared to the ohmic heating regime. Switching on the second additional beam with the particle energy of up to 30 keV and power of up to 0.5 MW resulted in obtaining the hot ion mode in the range of mean plasma densities of (1.6–10) × 10 19 m −3 . According to the data of active spectroscopy and neutral particle analyzer diagnostics, in the hot zone, the ion temperature reached 4 keV at the plasma density of 8 × 10 19 m −3 , which is more than 2.5 times higher than the electron temperature.
Type of Medium:
Online Resource
ISSN:
1063-780X
,
1562-6938
DOI:
10.1134/S1063780X23600214
Language:
English
Publisher:
Pleiades Publishing Ltd
Publication Date:
2023
detail.hit.zdb_id:
2004929-8
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