Electron cyclotron heating and current drive: Present experiments to ITER

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Electron cyclotron (EC) power has technological and physics advantages for heating and current drive in a tokamak reactor, and advances in source development make it credible for applications in ITER. Strong single pass absorption makes heating to ignition particularly simple. The optimized EC current drive (ECCD) efficiency (<n>IR/P) shows a linear temperature scaling at temperatures up to {approximately}15 keV. For temperatures above 30 keV, the efficiency saturates at approximately 0.3{center_dot}10{sup 20} A/(m{sup 2}W) for a frequency of 220 GHz in an ITER target plasma with toroidal field of 6 T, due primarily to harmonic overlap and to a lesser extent ... continued below

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10 p.

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Harvey, R.W.; Nevins, W.M.; Smith, G.R.; Lloyd, B.; O`Brien, M.R. & Warrick, C.D. August 1, 1995.

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  • General Atomic Company
    Publisher Info: General Atomics, San Diego, CA (United States)
    Place of Publication: San Diego, California

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Description

Electron cyclotron (EC) power has technological and physics advantages for heating and current drive in a tokamak reactor, and advances in source development make it credible for applications in ITER. Strong single pass absorption makes heating to ignition particularly simple. The optimized EC current drive (ECCD) efficiency (<n>IR/P) shows a linear temperature scaling at temperatures up to {approximately}15 keV. For temperatures above 30 keV, the efficiency saturates at approximately 0.3{center_dot}10{sup 20} A/(m{sup 2}W) for a frequency of 220 GHz in an ITER target plasma with toroidal field of 6 T, due primarily to harmonic overlap and to a lesser extent due to limitations arising from relativistic effects. The same efficiency can also be obtained at 170 GHz for the same plasma equilibrium except that the magnetic field is reduced to (170/200) {times} 6 T = 4.6 T. The ECCD efficiencies are obtained with the comprehensive 3D, bounce-averaged Fokker-Planck CQL3D codes and BANDIT3D.

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10 p.

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INIS; OSTI as DE95015671

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  • 9. joint workshop on electron cyclotron emission and electron cyclotron resonance heating, Borrego Springs, CA (United States), 23-26 Jan 1995

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  • Other: DE95015671
  • Report No.: GA-A--22050
  • Report No.: CONF-950112--4
  • Grant Number: AC03-89ER51114
  • Office of Scientific & Technical Information Report Number: 100290
  • Archival Resource Key: ark:/67531/metadc628150

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Office of Scientific & Technical Information Technical Reports

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  • August 1, 1995

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  • June 16, 2015, 7:43 a.m.

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  • April 18, 2016, 6 p.m.

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Harvey, R.W.; Nevins, W.M.; Smith, G.R.; Lloyd, B.; O`Brien, M.R. & Warrick, C.D. Electron cyclotron heating and current drive: Present experiments to ITER, article, August 1, 1995; San Diego, California. (digital.library.unt.edu/ark:/67531/metadc628150/: accessed November 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.