New Electron Cyclotron Emission Diagnostic Based Upon the Electron Bernstein Wave

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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(subscript i). One can reach the blackbody condition with a ... continued below

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Efthimion, P.C.; Hosea, J.C.; Kaita, R.; Majeski, R. & Taylor, G. May 1, 1999.

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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(subscript i). One can reach the blackbody condition with a plasma density approximately equal to 10(superscript 11) cm(superscript -3) and electron temperature approximately equal to 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 (approximately 1-2 mm) in low field devices.

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Medium: P; Size: vp.

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INIS; OSTI as DE00006797

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  • 13th Topical Conference on Applications of Radio Frequency Power to Plasmas, Annapolis, MD (US), 04/12/1999--04/14/1999

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  • Report No.: Cfpaper-4025
  • Grant Number: AC02-76CH03073
  • Office of Scientific & Technical Information Report Number: 6797
  • Archival Resource Key: ark:/67531/metadc708955

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  • May 1, 1999

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  • Sept. 12, 2015, 6:31 a.m.

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  • April 15, 2016, 9:46 p.m.

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Efthimion, P.C.; Hosea, J.C.; Kaita, R.; Majeski, R. & Taylor, G. New Electron Cyclotron Emission Diagnostic Based Upon the Electron Bernstein Wave, article, May 1, 1999; Princeton, New Jersey. (digital.library.unt.edu/ark:/67531/metadc708955/: accessed August 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.