Low recycling core and edge plasmas in LTX-β

POSTER

Abstract

LTX-β is currently vented for repair and modifications, with pumpdown scheduled for midsummer 2024. Modifications made during the vent include new porting for the neutral beam to increase the tangency radius by 50%, to significantly reduce the first orbit fast ion loss fraction, and increase beam coupling at higher power and injection energy. A new neutral particle analyzer will diagnose fast ion losses. Improvements have been made to the Thomson scattering system to increase signal to noise, especially for the separate APD-based high field side view. An additional Thomson scattering view of the scrape-off layer plasma will be installed during the upcoming campaign. A new high-field side limiter will be imaged by a two-color IR camera to diagnose the scrape-off layer (SOL) power deposition width. In a collaboration with Penn State University, a new remotely actuated liquid-filled lithium deposition system, which can be operated between shots, will be installed. LTX-β is fueled by a combination of high and low field side gas puffing, and a supersonic gas injector, as well as the neutral beam. An additional high field side gas nozzle surrounded by a small gas box is being added during this vent. A new diagnostic, Doppler Free Saturation Spectroscopy (DFSS), is being installed to diagnose the electric field which is expected to develop in the low collisionality SOL. First results from the reconfigured device will be discussed. Finally, prospects for full beam fueling with low recycling walls will be discussed, with emphasis on the very low collisionality SOL expected to result.

Presenters

  • Richard Majeski

    Princeton Plasma Physics Laboratory, PPPL

Authors

  • Richard Majeski

    Princeton Plasma Physics Laboratory, PPPL

  • Santanu Banerjee

    Princeton Plasma Physics Laboratory, PPPL

  • Dennis P Boyle

    Princeton Plasma Physics Laboratory, PPPL

  • Dylan Corl

    Princeton Plasma Physics Laboratory

  • Ahmed Diallo

    Princeton Plasma Physics Laboratory, Princeton Plasma Physics Laboratory (PPPL)

  • Manaure Francisquez

    Princeton Plasma Physics Laboratory, Princeton Plasma Physics Laboratory (PPPL)

  • Euichan Jung

    Princeton Plasma Physics Laboratory

  • Manjit Kaur

    Princeton Plasma Physics Laboratory

  • Manjit Kaur

    Princeton Plasma Physics Laboratory

  • Mate Lampert

    Princeton Plasma Physics Laboratory

  • Boting Li

    Princeton Plasma Physics Laboratory, Columbia University, Princeton Plasma Physics Labratory

  • Anurag Maan

    Princeton Plasma Physics Laboratory, PPPL, Princeton Plasma Physics Laboratory (PPPL)

  • Rajesh Maingi

    Princeton Plasma Physics Laboratory, Princeton Plasma Physics Laboratory (PPPL)

  • Enrique Merino

    Princeton Plasma Physics Laboratory

  • Javier Jose Morales

    Princeton University, Princeton Plasma Physics Laboratory

  • Yang Ren

    Princeton Plasma Physics Laboratory

  • George J Wilkie

    Princeton Plasma Physics Laboratory

  • Bruce E Koel

    Princeton University

  • William J Capecchi

    University of Wisconsin - Madison, U. Wisconsin

  • Hussain Gajani

    University of Wisconsin - Madison

  • Drew Elliott

    Oak Ridge National Laboratory

  • Elijah Henry Martin

    Oak Ridge National Lab

  • Abdourahmane Diaw

    Oak Ridge National Laboratory

  • Christopher J Hansen

    Columbia University

  • Shigeyuki Kubota

    University of California, Los Angeles

  • Terry L Rhodes

    University of California, Los Angeles

  • Leonid Zakharov

    LiWFusion; Department of Physics, University of Helsinki, LiWFusion

  • Adam G McLean

    Lawrence Livermore Natl Lab

  • Vlad A Soukhanovskii

    Lawrence Livermore Natl Lab, LLNL

  • Camila Lopez Perez

    Pennsylvania State University

  • Martin Nieto-Perez

    Pennsylvania State University