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Title: High-frequency plasma-heating apparatus

Abstract

An array of adjacent wave guides feed high-frequency energy into a vacuum chamber in which a toroidal plasma is confined by a magnetic field, the wave guide array being located between two toroidal current windings. Waves are excited in the wave guide at a frequency substantially equal to the lower frequency hybrid wave of the plasma and a substantially equal phase shift is provided from one guide to the next between the waves therein. For plasmas of low peripheral density gradient, the guides are excited in the TE.sub.01 mode and the output electric field is parallel to the direction of the toroidal magnetic field. For exciting waves in plasmas of high peripheral density gradient, the guides are excited in the TM.sub.01 mode and the magnetic field at the wave guide outlets is parallel to the direction of the toroidal magnetic field. The wave excited at the outlet of the wave guide array is a progressive wave propagating in the direction opposite to that of the toroidal current and is, therefore, not absorbed by so-called "runaway" electrons.

Inventors:
 [1];  [2]
  1. St. Egreve, FR
  2. Grenoble, FR
Issue Date:
Research Org.:
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
OSTI Identifier:
863169
Patent Number(s):
4110595
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:  
AT(11-1)-3073
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
high-frequency; plasma-heating; apparatus; array; adjacent; wave; guides; feed; energy; vacuum; chamber; toroidal; plasma; confined; magnetic; field; guide; located; current; windings; waves; excited; frequency; substantially; equal; hybrid; phase; shift; provided; therein; plasmas; peripheral; density; gradient; 01; mode; output; electric; parallel; direction; exciting; tm; outlets; outlet; progressive; propagating; opposite; absorbed; so-called; runaway; electrons; toroidal magnet; toroidal current; wave guides; wave guide; toroidal magnetic; phase shift; toroidal plasma; vacuum chamber; electric field; magnetic field; substantially equal; direction opposite; density gradient; heating apparatus; frequency energy; waves therein; guide array; frequency plasma; output electric; /219/376/

Citation Formats

Brambilla, Marco, and Lallia, Pascal. High-frequency plasma-heating apparatus. United States: N. p., 1978. Web.
Brambilla, Marco, & Lallia, Pascal. High-frequency plasma-heating apparatus. United States.
Brambilla, Marco, and Lallia, Pascal. Sun . "High-frequency plasma-heating apparatus". United States. https://www.osti.gov/servlets/purl/863169.
@article{osti_863169,
title = {High-frequency plasma-heating apparatus},
author = {Brambilla, Marco and Lallia, Pascal},
abstractNote = {An array of adjacent wave guides feed high-frequency energy into a vacuum chamber in which a toroidal plasma is confined by a magnetic field, the wave guide array being located between two toroidal current windings. Waves are excited in the wave guide at a frequency substantially equal to the lower frequency hybrid wave of the plasma and a substantially equal phase shift is provided from one guide to the next between the waves therein. For plasmas of low peripheral density gradient, the guides are excited in the TE.sub.01 mode and the output electric field is parallel to the direction of the toroidal magnetic field. For exciting waves in plasmas of high peripheral density gradient, the guides are excited in the TM.sub.01 mode and the magnetic field at the wave guide outlets is parallel to the direction of the toroidal magnetic field. The wave excited at the outlet of the wave guide array is a progressive wave propagating in the direction opposite to that of the toroidal current and is, therefore, not absorbed by so-called "runaway" electrons.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1978},
month = {1}
}

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