Investigating Energetic Particle Transport in LHD using Gyrokinetic Simulations

POSTER

Abstract

Understanding EP transport is crucial for optimizing stellarator performance and enhancing fusion efficiency. In this research, we utilize the gyrokinetic toroidal code (GTC) to perform neoclassical simulations of EP transport in the Large Helical Device (LHD) to eventually investigate the influence of the ambipolar electric field on EP dynamics. GTC is being benchmarked with GNET which has been extensively used in EP analysis in LHD. As a first step, GTC uses as input the slowing-down distribution function of fast ions obtained from GNET simulations. Utilizing the Fokker-Planck collision operator, GTC includes the effects of collisions between fast ions and thermal plasma. Results show that GTC can successfully preserve the fast ion phase space distribution from GNET.

*This work was supported by the US Department of Energy office of Science under award DE-SC0022131

Presenters

  • Ethan M Green

    • University of California, Irvine

Authors

  • Ethan M Green

    • University of California, Irvine

  • Javier H Nicolau

    • University of California, Irvine

  • Hiroyuki Yamaguchi

    • National Institute for Fusion Science
    • National Institute for Fusion Sciences

  • Wataru H Hayashi

    • University of California, Irvine

  • William W Heidbrink

    • University of California, Irvine

  • Xishuo Wei

    • University of California, Irvine
    • University of California Irvine
    • UC Irvine

  • Zhihong Lin

    • University of California, Irvine
    • Department of Physics and Astronomy, University of California, Irvine, California 92697, USA