NSTX Filament Preionization and Glow Discharge Cleaning Systems

Technical Report · Mon Nov 01 00:00:00 EST 1999

DOI:https://doi.org/10.2172/14466· OSTI ID:14466

Kugel, H. W.; Blanchard, W.; D'Amico, G.; Gernhardt, R.; Provost, T.

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.

• Research Organization: Princeton Plasma Physics Lab., NJ (United States)
• Sponsoring Organization: USDOE Office of Energy Research (ER) (United States)
• DOE Contract Number: AC02-76CH03073
• OSTI ID: 14466
• Report Number(s): PPPL-3381; AC02-CHO-3073
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
NSTX DEVICE
ANODES
SURFACE CLEANING
DIVERTORS
GLOW DISCHARGES
DEUTERIUM
HELIUM