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Title: Spheromak reactor with poloidal flux-amplifying transformer

Abstract

An inductive transformer in the form of a solenoidal coils aligned along the major axis of a flux core induces poloidal flux along the flux core's axis. The current in the solenoidal coil is then reversed resulting in a poloidal flux swing and the conversion of a portion of the poloidal flux to a toroidal flux in generating a spheromak plasma wherein equilibrium approaches a force-free, minimum Taylor state during plasma formation, independent of the initial conditions or details of the formation. The spheromak plasma is sustained with the Taylor state maintained by oscillating the currents in the poloidal and toroidal field coils within the plasma-forming flux core. The poloidal flux transformer may be used either as an amplifier stage in a moving plasma reactor scenario for initial production of a spheromak plasma or as a method for sustaining a stationary plasma and further heating it. The solenoidal coil embodiment of the poloidal flux transformer can alternately be used in combination with a center conductive cylinder aligned along the length and outside of the solenoidal coil. This poloidal flux-amplifying inductive transformer approach allows for a relaxation of demanding current carrying requirements on the spheromak reactor's flux core, reduces plasma contaminationmore » arising from high voltage electrode discharge, and improves the efficiency of poloidal flux injection.« less

Inventors:
 [1];  [2];  [3];  [4]
  1. Princeton, NJ
  2. East Windsor, NJ
  3. Osaka, JP
  4. Lawrenceville, NJ
Issue Date:
Research Org.:
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
OSTI Identifier:
866447
Patent Number(s):
4713208
Assignee:
United States of America as represented by United States (Washington, DC)
Patent Classifications (CPCs):
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
H - ELECTRICITY H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR H05H - PLASMA TECHNIQUE
DOE Contract Number:  
AC02-76CH03073
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
spheromak; reactor; poloidal; flux-amplifying; transformer; inductive; form; solenoidal; coils; aligned; major; axis; flux; core; induces; current; coil; reversed; resulting; swing; conversion; portion; toroidal; generating; plasma; equilibrium; approaches; force-free; minimum; taylor; formation; independent; initial; conditions; details; sustained; maintained; oscillating; currents; field; plasma-forming; amplifier; stage; moving; scenario; production; method; sustaining; stationary; heating; embodiment; alternately; combination; center; conductive; cylinder; length; outside; approach; allows; relaxation; demanding; carrying; requirements; reduces; contamination; arising; voltage; electrode; discharge; improves; efficiency; injection; poloidal flux; major axis; field coils; current carrying; toroidal field; field coil; plasma reactor; voltage electrode; spheromak plasma; solenoidal coil; conductive cylinder; flux core; approach allows; plasma formation; moving plasma; flux swing; /376/

Citation Formats

Furth, Harold P, Janos, Alan C, Uyama, Tadao, and Yamada, Masaaki. Spheromak reactor with poloidal flux-amplifying transformer. United States: N. p., 1987. Web.
Furth, Harold P, Janos, Alan C, Uyama, Tadao, & Yamada, Masaaki. Spheromak reactor with poloidal flux-amplifying transformer. United States.
Furth, Harold P, Janos, Alan C, Uyama, Tadao, and Yamada, Masaaki. Thu . "Spheromak reactor with poloidal flux-amplifying transformer". United States. https://www.osti.gov/servlets/purl/866447.
@article{osti_866447,
title = {Spheromak reactor with poloidal flux-amplifying transformer},
author = {Furth, Harold P and Janos, Alan C and Uyama, Tadao and Yamada, Masaaki},
abstractNote = {An inductive transformer in the form of a solenoidal coils aligned along the major axis of a flux core induces poloidal flux along the flux core's axis. The current in the solenoidal coil is then reversed resulting in a poloidal flux swing and the conversion of a portion of the poloidal flux to a toroidal flux in generating a spheromak plasma wherein equilibrium approaches a force-free, minimum Taylor state during plasma formation, independent of the initial conditions or details of the formation. The spheromak plasma is sustained with the Taylor state maintained by oscillating the currents in the poloidal and toroidal field coils within the plasma-forming flux core. The poloidal flux transformer may be used either as an amplifier stage in a moving plasma reactor scenario for initial production of a spheromak plasma or as a method for sustaining a stationary plasma and further heating it. The solenoidal coil embodiment of the poloidal flux transformer can alternately be used in combination with a center conductive cylinder aligned along the length and outside of the solenoidal coil. This poloidal flux-amplifying inductive transformer approach allows for a relaxation of demanding current carrying requirements on the spheromak reactor's flux core, reduces plasma contamination arising from high voltage electrode discharge, and improves the efficiency of poloidal flux injection.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1987},
month = {1}
}

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