Comparison of helium and hydrogen gas puffed plasmas in LAPD

POSTER

Abstract

In this poster we will compare turbulence characteristics of hydrogen and helium plasmas on Large Plasma Device (LAPD). Experimental observations in tokamaks have shown that a change in plasma species does affect transport and confinement. The LAPD experiments scanned a variety of electron densities and temperatures as well as neutral densities in helium. The operational range for hydrogen plasmas is more limited and we will compare the dimensionless parameters obtained for hydrogen against a large helium dataset. We will compare both the radial profiles for helium and hydrogen and the turbulence properties measured with 4-tipped Langmuir probe.

*NSF PHY 2144099, Research was completed using the Basic Plasma Science Facility, which is a collaborative research facility funded by DOE and NSF

Presenters

  • Lela Creamer

    • W&M

Authors

  • Lela Creamer

    • W&M

  • Leo Murphy

    • William & Mary

  • Saskia Mordijck

    • College of William and Mary

  • Stephen T Vincena

    • UCLA
    • University of California, Los Angeles

  • Thomas Look

    • University of California, Los Angeles
    • UCLA

  • Phil Travis

    • University of California, Los Angeles

  • Troy A Carter

    • University of California, Los Angeles