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Diagnostic Overview for Non-solenoidal Startup Experiments on Pegasus-III

POSTER

Abstract

The diagnostic set for initial experiments on Pegasus-III is designed to quantify the efficacy of DC helicity injection and microwave injection as approaches to non-solenoidal tokamak startup. The diagnostic set must constrain kinetic equilibrium reconstructions, quantify magnetic helicity dissipation, characterize the MHD and kinetic activity associated with current drive and magnetic relaxation, quantify impurity content and radiative losses arising from plasma-material interaction, and characterize the current drive sources. The magnetics measurements utilize cable shielding and differential balancing to suppress volt level EMI from switching power supplies driving the electromagnets. Active charge exchange spectroscopy, microwave interferometry, and a Thomson scattering system provide constraints for the kinetic profiles. Radiation measurements from an AXUV diode array, a visible bremsstrahlung system, and SPRED are used with STRAHL simulations to quantify impurity dynamics. Visible imaging and Stark broadening measurements are used to characterize the dense injector plasmas. Microwave imaging is used for optimizing the launch angle and quantifying mode conversion efficiency for electron Bernstein wave injection.

Presenters

  • Mark D Nornberg

    University of Wisconsin-Madison, University of Wisconsin - Madison

Authors

  • Mark D Nornberg

    University of Wisconsin-Madison, University of Wisconsin - Madison

  • Molly W Aslin

    University of Wisconsin-Madison, University of Wisconsin - Madison

  • Michael W Bongard

    University of Wisconsin-Madison

  • Michael T Borchardt

    University of Wisconsin-Madison, University of Wisconsin - Madison

  • Stephanie J Diem

    University of Wisconsin - Madison, University of Wisconsin-Madison

  • Abigail L Ferris

    University of Wisconsin-Madison, University of Wisconsin - Madison

  • Raymond J Fonck

    University of Wisconsin - Madison, University of Wisconsin-Madison

  • John A Goetz

    University of Wisconsin - Madison, University of Wisconsin-Madison

  • Armand K Keyhani

    University of Wisconsin-Madison, University of Wisconsin - Madison

  • Benjamin A Kujak-Ford

    University of Wisconsin-Madison, University of Wisconsin - Madison

  • Benjamin T Lewicki

    University of Wisconsin-Madison, University of Wisconsin - Madison

  • Jilliann K Peery

    University of Wisconsin - Madison

  • Christopher Pierren

    University of Wisconsin-Madison, University of Wisconsin - Madison

  • Joshua A Reusch

    University of Wisconsin-Madison, University of Wisconsin - Madison

  • Alexander T Rhodes

    University of Wisconsin-Madison, University of Wisconsin - Madison

  • Cuauhtemoc Rodriguez Sanchez

    University of Wisconsin-Madison, University of Wisconsin - Madison

  • Rachel K Sassella

    University of Wisconsin-Madison, University of Wisconsin - Madison

  • Carolyn E Schaefer

    University of Wisconsin-Madison, University of Wisconsin - Madison

  • Aaron C Sontag

    University of Wisconsin-Madison, University of Wisconsin - Madison

  • Timothy N Tierney

    University of Wisconsin-Madison, University of Wisconsin - Madison

  • Justin D Weberski

    University of Wisconsin-Madison, University of Wisconsin - Madison

  • Gregory R Winz

    University of Wisconsin-Madison, University of Wisconsin - Madison