Experimental Tests of Elongation Scaling in Gyrokinetic Turbulence Simulations

POSTER

Abstract

Comparisons of nonlinear GYRO simulations of DIII-D discharges with low and high elongation against experimental measurements are presented. Comparisons of measured low-$k$ density spectra (from beam emission spectroscopy), intermediate-$k$ density spectra (from Doppler backscattering), and low-$k$ electron temperature spectra (from correlation electron cyclotron emission radiometry) to synthetic spectra predictions at multiple flux-surfaces are shown. Results using both direct fits to profile measurements and flux-matching profiles predicted by the new TGYRO code [1] are presented, with agreement between model and experiment assessed via a simple set of newly developed validation metrics. \vskip4pt \noindent [1] J. Candy, et al., General Atomics Report GA-A26380 (2009).

*Work supported by US DOE under DE-FG02-07ER54917, DE-FG03-08ER54984, DE-FG02-89ER53296, DE-FG02-08ER54999, DE-AC05-06OR23100, DE-FG03-95ER54309 and DE-AC52-07NA27344.

Authors

  • C. Holland

    • UCSD

  • G.R. Tynan

    • UCSD

  • T.L. Rhodes

    • UCLA

  • W.A. Peebles

    • UCLA

  • L. Schmitz

    • UCLA

  • J.C. Hillesheim

    • UCLA

  • G. Wang

    • UCLA

  • L. Zeng

    • UCLA

  • E.J. Doyle

    • UCLA

  • G.R. McKee

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

  • Z. Yan

    • U. Wisc.

  • M.W. Shafer

    • U. Wisc.

  • A.E. White

    • ORISE
    • UCLA (presently at ORISE)

  • Jeff Candy

    • General Atomics
    • GA

  • R.E. Waltz

    • General Atomics
    • General Atomics, San Diego, California 92186, USA

  • J.E. Kinsey

    • General Atomics

  • G.M. Staebler

    • General Atomics
    • GA

  • J.C. DeBoo

    • General Atomics

  • R. Prater

    • General Atomics
    • GA

  • K.H. Burrell

    • General Atomics

  • C.C. Petty

    • General Atomics
    • GA

  • M.A. Makowski

    • Lawrence Livermore National Laboratory
    • LLNL