Trends from the DESC omnigenity stellarator database

ORAL

Abstract

Omnigenous magnetic fields guarantee confinement of all trapped particles, making omnigenity a prerequisite for high-performance stellarators. We have assembled and analyzed a large database of omnigenous configurations featuring poloidal (OP), helical (OH), toroidal (OT), and piecewise omnigenity. After outlining the multi-objective optimization workflow, we identify trends that inform reactor design.

A key result is that OH and OT configurations naturally achieve a positive magnetic well, lower 1/nu neoclassical transport (measured by eps_eff), and improved energetic-particle confinement (at least for the OH case) compared with OP configurations.

We present similar trends for all the equilibria in the database.

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Presenters

  • Rahul Gaur

    • Princeton University

Authors

  • Rahul Gaur

    • Princeton University

  • Yigit Elmacioglu

    • Princeton University

  • Victor F Pacheco

    • CIEMAT

  • Dario Panici

    • Princeton University

  • Greta Isabella Hibbard

    • Ohio University

  • Jose Luis Velasco

    • CIEMAT

  • Daniel William Dudt

    • Thea Energy

  • Rory Conlin

    • University of Maryland

  • Michael Churchill

    • Princeton Plasma Physics Laboratory (PPPL)
    • Princeton Plasma Physics Laboratory

  • Egemen Kolemen

    • Princeton University