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SPARC Divertor Mission, Physics and Engineering Basis

POSTER

Abstract

A subset of the physics and engineering basis for the plasma facing components (PFCs) in the SPARC tokamak are presented.  Designs are shown that support weakly dissipative commissioning scenarios, moderately dissipative, PRAD,DIV/PSOL ~ 0.5, high power, Pα+Pext = 41 MW, Qfus > 2 plasmas, and a range of highly dissipative configurations that can be used to accomplish SPARC’s advanced divertor mission.  Metrics for selection of plasma facing material are summarized, describing SPARC’s decision to operate with all tungsten-based PFCs.  Heat load specifications for quasi steady-state heat flux, ELMs and disruptions are presented, along with relevant results of high heat flux tungsten exposure tests and finite-element simulations of tile concepts.  Disruption electromagnetic load specifications for tiles are also discussed.  The goals of the SPARC advanced divertor mission are summarized, which take the form of seven open questions necessary to answer to inform ARC design.  The diagnostics that support this mission are highlighted, emphasizing minimum viable requirements.  SOLPS-ITER simulations of fully-detached, Ne-seeded SPARC plasmas are used to help scope the dynamic ranges needed for diagnostic design.

Presenters

  • Matthew L Reinke

    Commonwealth Fusion Systems, Oak Ridge National Lab, CFS, Commonwealth Fusion Systems, Cambridge, MA 02139, USA

Authors

  • Matthew L Reinke

    Commonwealth Fusion Systems, Oak Ridge National Lab, CFS, Commonwealth Fusion Systems, Cambridge, MA 02139, USA

  • Adam Q Kuang

    Massachusetts Institute of Technology MI, MIT Plasma Science and Fusion Center, MIT PSFC, Massachusetts Institute of Technology MIT

  • Dina Yuryev

    Commonwealth Fusion Systems

  • Michael Lagieski

    Commonwealth Fusion Systems

  • Trey Henderson

    Commonwealth Fusion Systems

  • Valeria Riccardo

    Commonwealth Fusion Systems, CFS

  • Alexander J Creely

    Commonwealth Fusion Systems

  • John Canik

    Oak Ridge National Lab, ORNL

  • Jeremy D Lore

    Oak Ridge National Lab, ORNL

  • Jerry W Hughes

    MIT PSFC, Massachusetts Institute of Technology MI, Massachusetts Institute of Technology MIT

  • Martin J Greenwald

    Massachusetts Institute of Technology MIT, MIT Plasma Science and Fusion Center, PSFC