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Title: Steady state compact toroidal plasma production

Abstract

Apparatus and method for maintaining steady state compact toroidal plasmas. A compact toroidal plasma is formed by a magnetized coaxial plasma gun and held in close proximity to the gun electrodes by applied magnetic fields or magnetic fields produced by image currents in conducting walls. Voltage supply means maintains a constant potential across the electrodes producing an increasing magnetic helicity which drives the plasma away from a minimum energy state. The plasma globally relaxes to a new minimum energy state, conserving helicity according to Taylor's relaxation hypothesis, and injecting net helicity into the core of the compact toroidal plasma. Controlling the voltage so as to inject net helicity at a predetermined rate based on dissipative processes maintains or increases the compact toroidal plasma in a time averaged steady state mode.

Inventors:
 [1]
  1. Livermore, CA
Issue Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
865933
Patent Number(s):
4601871
Assignee:
United States of America as represented by United States (Washington, DC)
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
steady; compact; toroidal; plasma; production; apparatus; method; maintaining; plasmas; formed; magnetized; coaxial; gun; held; close; proximity; electrodes; applied; magnetic; fields; produced; image; currents; conducting; walls; voltage; supply; means; maintains; constant; potential; producing; increasing; helicity; drives; minimum; energy; globally; relaxes; conserving; according; taylor; relaxation; hypothesis; injecting; net; core; controlling; inject; predetermined; rate; based; dissipative; processes; increases; time; averaged; mode; supply means; compact toroidal; voltage supply; close proximity; toroidal plasma; magnetic field; magnetic fields; predetermined rate; plasma gun; applied magnetic; time average; coaxial plasma; toroidal plasmas; rate based; increasing magnetic; image currents; axial plasma; /376/

Citation Formats

Turner, William C. Steady state compact toroidal plasma production. United States: N. p., 1986. Web.
Turner, William C. Steady state compact toroidal plasma production. United States.
Turner, William C. Wed . "Steady state compact toroidal plasma production". United States. https://www.osti.gov/servlets/purl/865933.
@article{osti_865933,
title = {Steady state compact toroidal plasma production},
author = {Turner, William C},
abstractNote = {Apparatus and method for maintaining steady state compact toroidal plasmas. A compact toroidal plasma is formed by a magnetized coaxial plasma gun and held in close proximity to the gun electrodes by applied magnetic fields or magnetic fields produced by image currents in conducting walls. Voltage supply means maintains a constant potential across the electrodes producing an increasing magnetic helicity which drives the plasma away from a minimum energy state. The plasma globally relaxes to a new minimum energy state, conserving helicity according to Taylor's relaxation hypothesis, and injecting net helicity into the core of the compact toroidal plasma. Controlling the voltage so as to inject net helicity at a predetermined rate based on dissipative processes maintains or increases the compact toroidal plasma in a time averaged steady state mode.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1986},
month = {1}
}

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