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Session 7F - DIII-D: Edge and H-Mode.
ORAL session, Thursday morning, November 14
Vail Room, Adam's Mark

[7F.10] Recent Physics Results from the DIII--D Disruption Program

T.E. Evans, P.L. Taylor, A.G. Kellman, M.J. Schaffer, A.W. Hyatt, D.A. Humphreys, R.L. Lee, P.B. Parks (General Atomics), D.G. Whyte (INRS--Energie et Materiaux), T.C. Jernigan (Oak Ridge National Laboratory), S. Luckhardt, J.W. Cuthbertson, J. Zhang (University of California, San Diego), G.W. Jahns, D. Wroblewski (ORINCON)

Recent disruption experiments on DIII--D have provided a variety of new characterization and mitigation data with which to better understand the physics of disruptive instabilities. Peak halo current amplitudes are reduced by up to 50% in triggered VDEs with both neon and argon ``killer'' pellets. Halo current toroidal peaking factors are also reduced from \sim 3 to 1.1 for these discharges. Impurity radiation accounts for at least 90% of the thermal quench during ``killer'' pellet injection. Runaway electrons are generated on some neon ``killer'' pellet injection discharges but not others. Argon ``killer'' pellets typically generate more runaway electrons than neon. Runaway electrons are also seen during some negative central shear (NCS) disruptions. Results on the successful implementation of a real-time neural network used to predict the high beta disruption boundary will also be discussed.

Part 7 of program listing