Efficient ion heating of tokamak plasma by application of positive and negative current pulse in TRIAM-1
Abstract
The efficient heating of bulk ions of tokamak plasma is observed by application of the pulsed toroidal electric field much higher than the Dreicer field with the positive and negative polarities for the ohmic heating field. No deleterious effect on the confinement properties of tokamak plasma appears by the heating. The decay time of ion temperature raised by the heating pulse agrees well with the prediction by the neoclassical transport theory. The magnitude of the current induced by the pulsed electric field with the positive polarity is limited by the violent current disruption. In the case of the negative polarity, this is limited by lack of the MHD equilibrium due to vanishing the total plasma current. The ratio of drift velocity to electron thermal velocity attains around 0.5, which suggests that the efficient ion heating may be due to the current-driven turbulence.
- Publication:
-
Kyushu University Research Institute Applied Mechanics Reports
- Pub Date:
- February 1980
- Bibcode:
- 1980KyUAM..27..111T
- Keywords:
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- Energy Conversion Efficiency;
- Plasma Control;
- Plasma Currents;
- Plasma Heating;
- Tokamak Devices;
- Toroidal Plasmas;
- Electric Fields;
- Electric Pulses;
- Energy Technology;
- Fusion Reactors;
- Ion Temperature;
- Plasma Diagnostics;
- Plasma Turbulence;
- Reactor Design;
- Resistance Heating;
- Plasma Physics