First results from the Lithium Tokamak Experiment - $\beta $

POSTER

Abstract

LTX$\beta $, the upgrade to the Lithium Tokamak Experiment, has operated with full lithium coating of the plasma-facing surfaces, at increased toroidal field of 0.3 T. Plasma current has so far been limited to 100 kA. The upgrade includes a neutral beam injector provided by Tri-Alpha Energy Technologies - 600 kW of beam power has been injected so far. Up to 60{\%} of the injected power is deposited in the plasma, in agreement with NUBEAM modeling. Significant beam fueling is observed under some conditions. New insertable lithium evaporators have been installed on LTX$\beta $, which provide full wall coatings, with a 10-15 minute evaporation cycle. LTX$\beta $ retains the same plasma geometry, and the heated high-Z liner featured in LTX. Upgrades to the diagnostic set include active CHERs. New Lyman- $\alpha $ arrays will permit a determination of energy confinement time as a function of recycling. Here we will discuss first results from LTX$\beta $, as well as the research goals.

*This work supported by US DOE contracts DE-AC02-09CH11466, DE-AC05-00OR22725 and DE-AC52-07NA27344.

Authors

  • R. Majeski

    • Princeton Plasma Physics Laboratory
    • PPPL
  • R. E. Bell

    • PPPL
  • D. P. Boyle

    • PPPL
  • P. E. Hughes

    • PPPL
  • T. Kozub

    • PPPL
  • A. LeViness

    • PPPL
  • E. Merino

    • PPPL
  • X. Zhang

    • PPPL
  • J. K. Anderson

    • U. Wis.
  • W. Capecchi

    • U. Wis.
  • P. Beiersdorfer

    • LLNL
  • M. A. Dorf

    • LLNL
  • F. Scotti

    • LLNL
  • V. A. Soukhanovskii

    • LLNL
  • T. Biewer

    • ORNL
  • D. B. Elliott

    • ORNL
  • D. Donovan

    • U. Tenn.
  • R. Kaita

    • U. Tenn.
  • A. Maan

    • U. Tenn.
  • C. Hansen

    • U. Wash.
  • B. Koel

    • Princeton U.
  • S. Kubota

    • UCLA
  • T. Rhodes

    • UCLA
  • L. E. Zakharov

    • LiWFusion