Development of a non-linear rf sheath benchmark suite

POSTER

Abstract

The Bohm sheath on plasma facing components (PFCs) can be energized through rectification by RF waves that reflect off of the PFCs. This can create voltages in excess of 100 V that are sufficient to cause impurities to sputter the surface. The modeling of this effect is a very active area of research. In this poster we present cases that have been benchmarked across several codes using different approaches. Many of these cases were first shown in Kohno Comp. Phys. Comm. (2017). We demonstrate consistency of the solution to high accuracy independent of approach. Cases include non-linear sheaths in 1D and 2D and the sheath plasma wave. These cases should serve as a benchmark suite for developers.

*This work supported by US Department of Energy SciDAC grant DE-SC0018909 and Department of Energy ORNL grant DE-AC05-00OR22725.

Publication: "A finite element procedure for radio-frequency sheath–plasma interactions based on a sheath impedance model"
H. Kohno, J.R. Myra, CPC (2017)

"RF sheath induced sputtering on Proto-MPEX part 1: sheath equivalent dielectric layer for modeling the RF sheath"
Author: Clyde Beers, D. L. Green, Cornwall Lau, James Myra, Juergen Rapp, Timothy Younkin, and Steven Zinkle - under review

"Development of a non-linear rf sheath benchmark suite", J. Wright, C. Migliore (MIT PSFC),J. Myra (Lodestar),D. Curreli (UIUC),D. Smithe and T. Jenkins (Tech-X),M. Stowell (LLNL),D. Green, C. Beers, and T. Younkin (ORNL),S. Shiraiwa, N. Bertelli, M. Poulos (PPPL),H. Kohno (Kyutech [Kyushu Institute of Technology]) - in preparation

Presenters

  • John C Wright

    • Massachusetts Institute of Technology MIT
    • Massachusetts Institute of Technology MI
    • MIT PSFC

Authors

  • John C Wright

    • Massachusetts Institute of Technology MIT
    • Massachusetts Institute of Technology MI
    • MIT PSFC

  • Christina Migliore

    • Massachusetts Institute of Technology MI

  • James R Myra

    • Lodestar Research Corporation

  • Davide Curreli

    • University of Illinois at Urbana-Champaign

  • David N Smithe

    • Tech-X Corporation
    • Tech-X Corp

  • Thomas G Jenkins

    • Tech-X Corporation

  • Mark L Stowell

    • Lawrence Livermore Natl Lab

  • David L Green

    • Oak Ridge National Lab

  • Clyde J Beers

    • University of Tennessee

  • Tim Younkin

    • Oak Ridge National Lab

  • Syun'ichi Shiraiwa

    • Princeton Plasma Physics Laboratory
    • PPPL

  • Nicola Bertelli

    • PPPL, Princeton University
    • Princeton University / Princeton Plasma Physics Laboratory
    • Princeton Plasma Physics Laboratory

  • Matthew J Poulos

    • California State University, Los Angeles
    • Princeton Plasma Physics Laboratory

  • Haruhiko Kohno

    • Kyushu Institute of Technology