Full Paper
Contents  Return  Previous Page  Next Page  Index

Return To: Session EX/S2 & TH/5 - Resistive Wall Modes
Prev Page: (EX/S2-3) MHD-Mode Locking by Controlled Halo-Current in T-10
Next Page: (TH/5-1) Nonlinear Simulation Studies of Tokamaks and ST's

(EX/S2-4) Disruption Mitigation Using High-Pressure Noble Gas Injection on DIII-D

D.G. Whyte1), T.C. Jernigan2), D.A. Humphreys3), A.W. Hyatt3), C.J. Lasnier4), P.B. Parks3), T.E. Evans3), P.L. Taylor3), A.G. Kellman3), D.S. Gray1), E.M. Hollmann1)
1) University of California, San Diego, La Jolla, USA
2) Oak Ridge National Laboratory, Oak Ridge, Tennessee, USA
3) General Atomics, San Diego, California, USA
4) Lawrence Livermore National Laboratory, Livermore, California, USA

Abstract.  High-pressure gas jet injection of neon and argon is shown to be a simple and robust method to mitigate the deleterious effects of disruptions on the DIII-D tokamak. The gas jet penetrates to the central plasma at its sonic velocity. The deposited species dissipates $ \sim$100% of the plasma thermal energy by radiation and substantially reduces mechanical stresses on the vessel caused by poloidal halo currents. The gas jet species charge distribution can include > 50% fraction neutral species which inhibits runaway electrons. The favorable scaling of this technique to burning fusion plasmas is discussed. *Work supported by U.S. Department of Energy under Grant No. DE-FG03-95ER54294 and Contracts DE-AC05-00OR22725, DE-AC03-99ER54463, and W-7405-ENG-48.

Read the full paper in PDF format.

IAEA 2003