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Title: New electron cyclotron emission diagnostic based upon the electron Bernstein wave

Abstract

Most magnetically confined plasma devices cannot take advantage of standard Electron Cyclotron Emission (ECE) diagnostics to measure temperature. They either operate at high density relative to their magnetic field or they do not have sufficient density and temperature to reach the blackbody condition. The standard ECE technique measures the electromagnetic waves emanating from the plasma. Here we propose to measure electron Bernstein waves (EBW) to ascertain the local electron temperature in these plasmas. The optical thickness of EBW is extremely high because it is an electrostatic wave with a large k{sub i}. One can reach the blackbody condition with a plasma density{approx_equal}10{sup 11} cm{sup -3} and T{sub e}{approx_equal}1 eV. This makes it attractive to most plasma devices. One serious issue with using EBW is the wave accessibility. EBW may be accessible by either direct coupling or mode conversion through an extremely narrow layer ((approx =)1-2 mm) in low field devices. (c) 1999 American Institute of Physics.

Authors:
 [1];  [1];  [1];  [1];  [1]
  1. Princeton University Plasma Physics Lab, Princeton, New Jersey 08543 (United States)
Publication Date:
OSTI Identifier:
20216722
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 485; Journal Issue: 1; Other Information: PBD: 20 Sep 1999; Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ECR HEATING; BERNSTEIN MODE; PLASMA DIAGNOSTICS; ELECTRON TEMPERATURE; DISPERSION RELATIONS; PLASMA DENSITY

Citation Formats

Efthimion, P. C., Hosea, J. C., Kaita, R., Majeski, R., and Taylor, G. New electron cyclotron emission diagnostic based upon the electron Bernstein wave. United States: N. p., 1999. Web. doi:10.1063/1.59761.
Efthimion, P. C., Hosea, J. C., Kaita, R., Majeski, R., & Taylor, G. New electron cyclotron emission diagnostic based upon the electron Bernstein wave. United States. doi:10.1063/1.59761.
Efthimion, P. C., Hosea, J. C., Kaita, R., Majeski, R., and Taylor, G. Mon . "New electron cyclotron emission diagnostic based upon the electron Bernstein wave". United States. doi:10.1063/1.59761.
@article{osti_20216722,
title = {New electron cyclotron emission diagnostic based upon the electron Bernstein wave},
author = {Efthimion, P. C. and Hosea, J. C. and Kaita, R. and Majeski, R. and Taylor, G.},
abstractNote = {Most magnetically confined plasma devices cannot take advantage of standard Electron Cyclotron Emission (ECE) diagnostics to measure temperature. They either operate at high density relative to their magnetic field or they do not have sufficient density and temperature to reach the blackbody condition. The standard ECE technique measures the electromagnetic waves emanating from the plasma. Here we propose to measure electron Bernstein waves (EBW) to ascertain the local electron temperature in these plasmas. The optical thickness of EBW is extremely high because it is an electrostatic wave with a large k{sub i}. One can reach the blackbody condition with a plasma density{approx_equal}10{sup 11} cm{sup -3} and T{sub e}{approx_equal}1 eV. This makes it attractive to most plasma devices. One serious issue with using EBW is the wave accessibility. EBW may be accessible by either direct coupling or mode conversion through an extremely narrow layer ((approx =)1-2 mm) in low field devices. (c) 1999 American Institute of Physics.},
doi = {10.1063/1.59761},
journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 485,
place = {United States},
year = {1999},
month = {9}
}