NSTX Filament Preionization and Glow Discharge Cleaning Systems

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Initial NSTX GDC experiments were performed with one moveable anode and a biased filament preionization system that allowed D2 and He Glow Discharge breakdowns at the actual operating pressure, voltage and current. The biased filament system was also operated continuously during ohmic operations, and used to reduce volt-sec consumption for February 1999 plasma discharges up to 280 KA. An upgraded system has been installed with 2 fixed wall anodes and 3 biased filaments; 2 on the mid-plane and one in the divertor region; all separately controllable remotely using a PLC system. Recent applications include assisting in preionization for 800 KA ... continued below

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99 Kilobytes pages

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H.W. Kugel, W. Blanchard, G. D'Amico, R. Gernhardt, T. Provost November 1, 1999.

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Description

Initial NSTX GDC experiments were performed with one moveable anode and a biased filament preionization system that allowed D2 and He Glow Discharge breakdowns at the actual operating pressure, voltage and current. The biased filament system was also operated continuously during ohmic operations, and used to reduce volt-sec consumption for February 1999 plasma discharges up to 280 KA. An upgraded system has been installed with 2 fixed wall anodes and 3 biased filaments; 2 on the mid-plane and one in the divertor region; all separately controllable remotely using a PLC system. Recent applications include assisting in preionization for 800 KA plasma discharges.

Physical Description

99 Kilobytes pages

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INIS; OSTI as DE00014466

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  • Other Information: PBD: 1 Nov 1999

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  • Report No.: PPPL-3381
  • Grant Number: AC02-76CH03073
  • Office of Scientific & Technical Information Report Number: 14466
  • Archival Resource Key: ark:/67531/metadc628170

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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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  • November 1, 1999

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  • June 16, 2015, 7:43 a.m.

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  • April 15, 2016, 9:47 p.m.

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H.W. Kugel, W. Blanchard, G. D'Amico, R. Gernhardt, T. Provost. NSTX Filament Preionization and Glow Discharge Cleaning Systems, report, November 1, 1999; Princeton, New Jersey. (digital.library.unt.edu/ark:/67531/metadc628170/: accessed December 16, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.