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Title: Thermonuclear inverse magnetic pumping power cycle for stellarator reactors

A novel power cycle for direct conversion of alpha-particle energy into electricity is proposed for an ignited plasma in a stellarator reactor. The plasma column is alternately compressed and expanded in minor radius by periodic variation of the toroidal magnetic field strength. As a result of the way a stellarator is expected to work, the plasma pressure during expansion is greater than the corresponding pressure during compression. Therefore, negative work is done on the plasma during a complete cycle. This work manifests itself as a back-voltage in the toroidal field coils, and direct electrical energy is obtained from this voltage. For a typical reactor, the average power obtained from this cycle (with a minor radius compression factor on the order of 50%) can be as much as 50% of the electrical power obtained from the thermonuclear neutrons without compressing the plasma. Thus, if it is feasible to vary the toroidal field strength, the power cycle provides an alternative scheme of energy conversion for a deuterium-tritium fueled reactor. The cycle may become an important method of energy conversion for advanced neutron-lean fueled reactors. By operating two or more reactors in tandem, the cycle can be made self-sustaining.
Authors:
;
Publication Date:
OSTI Identifier:
5138614
Report Number(s):
PPPL-2249
ON: DE86002539
DOE Contract Number:
AC02-76CH03073
Resource Type:
Technical Report
Research Org:
Princeton Univ., NJ (USA). Plasma Physics Lab.
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; STELLARATOR TYPE REACTORS; ENERGY CONVERSION; ALPHA PARTICLES; ELECTRIC POTENTIAL; MAGNETIC FIELD CONFIGURATIONS; MAGNETIC-PUMPING HEATING; PLASMA PRESSURE; CHARGED PARTICLES; CONVERSION; HEATING; HIGH-FREQUENCY HEATING; PLASMA HEATING; THERMONUCLEAR REACTORS; 700207* - Fusion Power Plant Technology- Power Conversion Systems