Neutral beam injection and plasma convection in a magnetic field

Journal Article · Tue Nov 01 00:00:00 EST 1988 · Phys. Fluids; (United States)

DOI:https://doi.org/10.1063/1.866945· OSTI ID:6793838

Okuda, H; Hiroe, S

Injection of a neutral beam into a plasma in a magnetic field has been studied by means of numerical plasma simulations. It is found that, in the absence of a rotational transform, the convection electric field arising from the polarization charges at the edges of the beam is dissipated by turbulent plasma convection, leading to anomalous plasma diffusion across the magnetic field. The convection electric field increases with the beam density and beam energy. In the presence of a rotational transform, polarization charges can be neutralized by the electron motion along the magnetic field. Even in the presence of a rotational transform, a steady-state convection electric field and hence anomalous plasma diffusion can develop when a neutral beam is constantly injected into a plasma. Theoretical investigations of the convection electric field are described for a plasma in the presence of a rotational transform.

• Research Organization: Plasma Physics Laboratory, Princeton University, P.O. Box 451, Princeton, New Jersey 08543
• OSTI ID: 6793838
• Journal Information: Phys. Fluids; (United States), Vol. 31:11
• Country of Publication: United States
• Language: English

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