Initial high-power testing of the ATF (Advanced Toroidal Facility) ECH (electron cyclotron heating) system

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The Advanced Toroidal Facility (ATF) is a moderate aspect ratio torsatron that will utilize 53.2 GHz 200 kW Electron Cyclotron Heating (ECH) to produce nearly current-free target plasmas suitable for subsequent heating by strong neutral beam injection. The initial configuration of the ECH system from the gyrotron to ATF consists of an optical arc detector, three bellows, a waveguide mode analyzer, two TiO/sub 2/ mode absorbers, two 90/sup 0/ miter bends, two waveguide pumpouts, an insulating break, a gate valve, and miscellaneous straight waveguide sections feeding a launcher radiating in the TE/sub 02/ mode. Later, a focusing Vlasov launcher will ... continued below

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Pages: 8

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White, T.L.; Bigelow, T.S. & Kimrey, H.D. Jr. January 1, 1987.

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Description

The Advanced Toroidal Facility (ATF) is a moderate aspect ratio torsatron that will utilize 53.2 GHz 200 kW Electron Cyclotron Heating (ECH) to produce nearly current-free target plasmas suitable for subsequent heating by strong neutral beam injection. The initial configuration of the ECH system from the gyrotron to ATF consists of an optical arc detector, three bellows, a waveguide mode analyzer, two TiO/sub 2/ mode absorbers, two 90/sup 0/ miter bends, two waveguide pumpouts, an insulating break, a gate valve, and miscellaneous straight waveguide sections feeding a launcher radiating in the TE/sub 02/ mode. Later, a focusing Vlasov launcher will be added to beam the ECH power to the saddle point in ATF magnetic geometry for optimum power deposition. The ECH system has several unique features; namely, the entire ECH system is evacuated, the ECH system is broadband, forward power is monitored by a newly developed waveguide mode analyzer, phase correcting miter bends will be employed, and the ECH system will be capable of operating short pulse to cw. Initial high-power tests show that the overall system efficiency is 87%. The waveguide mode analyzer shows that the gyrotron mode output consists of 13% TE/sub 01/, 82.6% TE/sub 02/, 2.5% TE/sub 03/, and 1.9% TE/sub 04/. 4 refs.

Physical Description

Pages: 8

Notes

NTIS, PC A02/MF A01; 1.

Source

  • Joint workshop on electron cyclotron emission and the electron cyclotron resonance heating, Oxford, UK, 16 Sep 1987

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  • Other: DE88000885
  • Report No.: CONF-8709157-1
  • Grant Number: AC05-84OR21400
  • Office of Scientific & Technical Information Report Number: 5925592
  • Archival Resource Key: ark:/67531/metadc1096920

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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.

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  • January 1, 1987

Added to The UNT Digital Library

  • Feb. 18, 2018, 3:59 p.m.

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  • May 15, 2018, 1:41 p.m.

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White, T.L.; Bigelow, T.S. & Kimrey, H.D. Jr. Initial high-power testing of the ATF (Advanced Toroidal Facility) ECH (electron cyclotron heating) system, article, January 1, 1987; Tennessee. (digital.library.unt.edu/ark:/67531/metadc1096920/: accessed October 15, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.