Particle Transport in RMP H-modes

ORAL

Abstract

Increased transport in resonant magnetic perturbations (RMP) H-modes reduces the pedestal pressure gradient below the Type I ELM stability limit. The RMP induces more particle transport and less electron thermal transport than expected from simple stochastic transport models. This increased transport starts during the RMP rise-time, and displays a broader resonance in q95 than ELM suppression. Evidence suggests that the transport is at first caused by a combination of neoclassical transport in the 3D equilibrium, $E\times B$ convection in the weakly stochastic layer, and fluctuation-driven transport. After the ELMs are suppressed, fluctuations increase due to Er shear changes. Optimizing these transport changes will improve the viability of RMP ELM-control for ITER.

*Supported by US DOE under DE-FG02-07ER54917, DE-FG02-05ER54809, DE-FC02-04ER54698, DE-AC05-06OR23100, DE-AC52-07NA27344, DE-AC04-94AL85000, DE-FG02-89ER53296, DE-FG02-08ER54984.

–

Authors

  • T.E. Evans

  • N.H. Brooks

  • R.A. Moyer

    • UCSD

  • V.A. Izzo

    • General Atomics
    • UCSD
    • University of California-San Diego

  • S. Mordijck

  • J.A. Boedo

    • UCSD

  • D.L. Rudakov

    • UCSD
    • University of California-San Diego

  • P. Gohil

    • General Atomics

  • E.A. Unterberg

    • ORISE

  • M.E. Fenstermacher

    • LLNL

  • H. Frerichs

  • O. Schmitz

  • B. Unterberg

    • FZJ

  • M.W. Jakubowski

    • MPI

  • J.G. Watkins

    • SNL
    • Sandia National Laboratory
    • Sandia National Laboratories

  • G.R. McKee

    • University of Wisconsin-Madison
    • U. Wisc-Madison

  • T.L. Rhodes

    • University of California-Los Angeles

  • L. Schmitz

  • L. Zeng

    • UCLA

  • C.S. Chang

  • G. Park

    • NYU