Massive Gas Injection Plans for Disruption Mitigation Studies in NSTX-U

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概要

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• Predicting and controlling disruptions is an important and urgent issue for ITER and impacts the designs for reactors based on the ST and Tokamak concepts. Disruptions have been such a ubiquitous feature of tokamak operations for decades that, while work is in progress to develop reliable methods to avoid disruptions, some may be unavoidable. For these cases, a fast discharge termination method is needed to minimize the deleterious effects of the disruption, particularly the generation of large populations of runaway electrons. Massive Gas Injection (MGI) is one approach to addressing this difficult issue for ITER. NSTX-U plans to compare MGI from different poloidal locations to assess the gas penetration efficiency. We are starting to model gas penetration using DEGAS-2 and it appears that the scrape-off-layer plasma may place limits on the achievable gas penetration fraction to the separatrix.

• 2012-07-01

著者

• RAMAN Roger

  University of Washington

• KUGEL Henry

  Princeton Plasma Physics laboratory

• Ono Masayuki

  Princeton Plasma Physics Laboratory

• Jarboe Thomas

  University of Washington

• Bell Michael

  Princeton Plasma Physics Laboratory

• Mueller Dennis

  Princeton Plasma Physics Laboratory

• Abrams Tyler

  Princeton Plasma Physics Laboratory

• STOTLER Daren

  Princeton Plasma Physics Laboratory

• GERHARDT Stephan

  Princeton Plasma Physics Laboratory

• MENARD Jonathan

  Princeton Plasma Physics Laboratory

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• First Results with the NSTX Fast Divertor Camera
• National Spherical Torus Experiment(NSTX) (小特集 球状トーラス研究の現状と将来展望) -- (Proof-of-Principle Spherical Torus Experiments)
• Solenoid-free Plasma Startup in NSTX using Coaxial Helicity Injection
• Status and Plans for the National Spherical Torus Experimental Research Facility
• Advances in Steady Inductive Helicity Injection for Plasma Startup and Toroidal Current Drive
• Massive Gas Injection Plans for Disruption Mitigation Studies in NSTX-U
• Transient Coaxial Helicity Injection Plasma Start-up in NSTX and CHI Program Plans on NSTX-U
• E × B Plasma Rotation and n = 1 Oscillation Observed in the NSTX-CHI Experiments
• First Results with the NSTX Fast Divertor Camera.
• A Pilot Plant as the Next Step toward an MFE Demo

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