Azimuthal ambipolar potential variations and tandem mirror transport
Azimuthal ambipolar potential variations are induced by the magnetic drifts in a quadrupole tandem mirror. Consequently, radial E x B drifts occur and contribute along with the magnetic drifts to the total radial flux in a collisional plasma. This effect is studied self-consistently in the resonant-plateau regime assuming Maxwell-Boltzmann electrons along the field lines. A general form exhibiting the contribution of the E x B drifts to the flux is obtained and shown, in general, to be significant. In the square well limit a particularly transparent form results which illustrates the role of dielectric shielding. When the azimuthal E x B drift and the azimuthal electron diamagnetic drift are equal and in opposite directions, the shielding becomes small and a large induced ambipolar contribution to the flux can occur.
- Research Organization:
- Science Applications, Inc., Boulder, CO (USA). Plasma Research Inst.
- DOE Contract Number:
- AC03-76ET53057
- OSTI ID:
- 5517256
- Report Number(s):
- SAI-83-1122/PRI-69; ON: DE84002655
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
700105* -- Fusion Energy-- Plasma Research-- Plasma Kinetics-Theoretical-- (-1987)
AMBIPOLAR DIFFUSION
DIFFERENTIAL EQUATIONS
DIFFUSION
EQUATIONS
MAGNETIC MIRRORS
MAXWELL EQUATIONS
OPEN PLASMA DEVICES
PARTIAL DIFFERENTIAL EQUATIONS
PLASMA DRIFT
PLATEAU REGIME
TANDEM MIRRORS
THERMONUCLEAR DEVICES
TMX DEVICES
TRANSPORT THEORY