Electron cyclotron heating on the ISX-B tokamak

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One experiment on electron cyclotron heating on the Impurity Study Experiment (ISX-b) tokamak has been completed and a second experiment is in progress. In the first experiment, with a gyrotron producing 100 kW at 35 GHz, a heating efficiency greater than 60% was achieved. Unpolarized radiation was launched from the high field side of the tokamak, heating electrons at cyclotron resonance in the center of the plasma. From laser scattering and thermal emission at the second gyroharmonic, the electron temperature, initially 850 eV, increased to 1250 eV at the end of a 15-ms pulse. The second experiment is now in ... continued below

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Pages: 9

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Eldridge, O.C.; England, A.C.; Gilgenbach, R.M.; Hackett, K.F.; Kulchar, A.G.; Loring, C.M. et al. January 1, 1980.

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Description

One experiment on electron cyclotron heating on the Impurity Study Experiment (ISX-b) tokamak has been completed and a second experiment is in progress. In the first experiment, with a gyrotron producing 100 kW at 35 GHz, a heating efficiency greater than 60% was achieved. Unpolarized radiation was launched from the high field side of the tokamak, heating electrons at cyclotron resonance in the center of the plasma. From laser scattering and thermal emission at the second gyroharmonic, the electron temperature, initially 850 eV, increased to 1250 eV at the end of a 15-ms pulse. The second experiment is now in progress, with 180 kW at 28 GHz and a capability of 100-ms pulses. A comparison between polarized and unpolarized radiation, modification of the plasma current profile, and a critical comparison with theory are planned. In this paper, experiments on preionization at the upper hybrid resonance are reported. A plasma with an electron temperature of 10 eV was produced, which is not high enough to reduce impurity radiation. The resistive part of the loop voltage was reduced by preionization. Plans for an experiment to measure electric current induced by electron cyclotron heating are presented, along with a review of the theoretical basis of the current drive.

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Pages: 9

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NTIS, PC A02/MF A01.

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  • 2. joint Grenoble-Varenna international symposium on heating in toroidal plasmas, Como, Italy, 3 Sep 1980

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  • Report No.: CONF-800932-5
  • Grant Number: W-7405-ENG-26
  • Office of Scientific & Technical Information Report Number: 5092301
  • Archival Resource Key: ark:/67531/metadc1060846

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • January 1, 1980

Added to The UNT Digital Library

  • Jan. 22, 2018, 7:23 a.m.

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  • Feb. 1, 2018, 6:25 p.m.

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Eldridge, O.C.; England, A.C.; Gilgenbach, R.M.; Hackett, K.F.; Kulchar, A.G.; Loring, C.M. et al. Electron cyclotron heating on the ISX-B tokamak, article, January 1, 1980; Tennessee. (digital.library.unt.edu/ark:/67531/metadc1060846/: accessed September 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.