Plasma confinement in L-2 stellarator with ohmic heating
Abstract
The results of investigations of ohmic plasma heating in the L-2 stellarator were reviewed. The vacuum structure of the magnetic field ensures plasma equilibrium in the stellarator. Magnetohydrodynamic (MHD) activity occurring in the central portion of the filament has a strong influence on the energy balance in that region. The structure of the MHD oscillations of the plasma in the internal region, and its relationship with the radius of the plasma filament, are established. The primary impurity in the investigated discharges is oxygen, which determines the observed volumetric energy losses, the quantity of Z sub eff, and their radial distributions. No coronal equilibrium was observed experimentally in the plasma, apparently because of the short discharge duration and the small transverse dimension of the plasma filament. The distribution of the ion temperature along the radius, which is asymmetrical because of ion drift in the inhomogeneous magnetic field, is determined throught energy analysis of the atom stream.
- Publication:
-
USSR Rept Phys Math JPRS UPM
- Pub Date:
- January 1986
- Bibcode:
- 1986RpPhM.......23S
- Keywords:
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- Impurities;
- Plasma Control;
- Plasma Equilibrium;
- Plasma Heating;
- Stellarators;
- Energy Dissipation;
- Magnetohydrodynamic Flow;
- Temperature Distribution;
- Plasma Physics