skip to main content
DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: System and method for generating current by selective electron heating

Abstract

A system for the generation of toroidal current in a plasma which is prepared in a toroidal magnetic field. The system utilizes the injection of high-frequency waves into the plasma by means of waveguides. The wave frequency and polarization are chosen such that when the waveguides are tilted in a predetermined fashion, the wave energy is absorbed preferentially by electrons traveling in one toroidal direction. The absorption of energy in this manner produces a toroidal electric current even when the injected waves themselves do not have substantial toroidal momentum. This current can be continuously maintained at modest cost in power and may be used to confine the plasma. The system can operate efficiently on fusion grade tokamak plasmas.

Inventors:
 [1];  [2]
  1. (Princeton, NJ)
  2. (Rocky Hill, NJ)
Issue Date:
Research Org.:
Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ
OSTI Identifier:
864835
Patent Number(s):
4425295
Assignee:
United States of America as represented by United States (Washington, DC) PPPL
DOE Contract Number:  
AC02-76CH03073
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; generating; current; selective; electron; heating; generation; toroidal; plasma; prepared; magnetic; field; utilizes; injection; high-frequency; waves; means; waveguides; wave; frequency; polarization; chosen; tilted; predetermined; fashion; energy; absorbed; preferentially; electrons; traveling; direction; absorption; manner; produces; electric; injected; substantial; momentum; continuously; maintained; modest; cost; power; confine; operate; efficiently; fusion; grade; tokamak; plasmas; operate efficiently; toroidal direction; toroidal magnet; toroidal current; toroidal magnetic; electric current; magnetic field; wave energy; tokamak plasma; toroidal electric; modest cost; frequency wave; continuously maintained; wave frequency; generating current; selective electron; /376/

Citation Formats

Fisch, Nathaniel J., and Boozer, Allen H. System and method for generating current by selective electron heating. United States: N. p., 1984. Web.
Fisch, Nathaniel J., & Boozer, Allen H. System and method for generating current by selective electron heating. United States.
Fisch, Nathaniel J., and Boozer, Allen H. Sun . "System and method for generating current by selective electron heating". United States. https://www.osti.gov/servlets/purl/864835.
@article{osti_864835,
title = {System and method for generating current by selective electron heating},
author = {Fisch, Nathaniel J. and Boozer, Allen H.},
abstractNote = {A system for the generation of toroidal current in a plasma which is prepared in a toroidal magnetic field. The system utilizes the injection of high-frequency waves into the plasma by means of waveguides. The wave frequency and polarization are chosen such that when the waveguides are tilted in a predetermined fashion, the wave energy is absorbed preferentially by electrons traveling in one toroidal direction. The absorption of energy in this manner produces a toroidal electric current even when the injected waves themselves do not have substantial toroidal momentum. This current can be continuously maintained at modest cost in power and may be used to confine the plasma. The system can operate efficiently on fusion grade tokamak plasmas.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1984},
month = {1}
}

Patent:

Save / Share: