Formation of Electron Internal Transport Barrier in Edge Plasma of Small Size Divertor Tokamak |
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Authors: | A H Bekheit |
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Affiliation: | (1) Plasma and Nuclear Fusion Department, Nuclear Research Centre, Atomic Energy Authority, Cairo, Egypt |
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Abstract: | The formation of electron internal transport barrier (EITB) during using counter-neutral beam injection (NBI) heating in the
edge plasma of small size divertor tokamak can be simulated by using fluid transport code B2SOLPS0.5.2D. The results of simulations
give us the following: (1) Plasma heating with counter-neutral beam injection leads to, strong, parabola type electron internal
transport barrier (EITB) was formed in the edge plasma of small size divertor tokamak. (2) In case of plasma heating by counter-neutral
beam injection, the radial electric field shear (E
r
–gradient) was increased, while electron transport coefficients were reduced in conjunction with the formation of electron
internal transport barrier (EITB). (3) The plasma heating by counter-neutral beam injection play significantly role in redistribution
of parallel (toroidal) velocity in edge plasma of small size divertor tokamak. |
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Keywords: | |
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