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Robust Avoidance of Edge-Localized Modes alongside Gradient Formation in the Negative Triangularity Tokamak Edge.
Nelson, A O; Schmitz, L; Paz-Soldan, C; Thome, K E; Cote, T B; Leuthold, N; Scotti, F; Austin, M E; Hyatt, A; Osborne, T.
Afiliación
  • Nelson AO; Columbia University, New York, New York 10027, USA.
  • Schmitz L; University of California-Los Angeles, Los Angeles, California 90095, USA.
  • Paz-Soldan C; Columbia University, New York, New York 10027, USA.
  • Thome KE; General Atomics, San Diego, California 92186, USA.
  • Cote TB; General Atomics, San Diego, California 92186, USA.
  • Leuthold N; Columbia University, New York, New York 10027, USA.
  • Scotti F; Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
  • Austin ME; The University of Texas at Austin, Austin, Texas 78712, USA.
  • Hyatt A; General Atomics, San Diego, California 92186, USA.
  • Osborne T; General Atomics, San Diego, California 92186, USA.
Phys Rev Lett ; 131(19): 195101, 2023 Nov 10.
Article en En | MEDLINE | ID: mdl-38000408
In a series of high performance diverted discharges on DIII-D, we demonstrate that strong negative triangularity (NT) shaping robustly suppresses all edge-localized mode (ELM) activity over a wide range of plasma conditions: ⟨n⟩=0.1-1.5×10^{20} m^{-3}, P_{aux}=0-15 MW, and |B_{t}|=1-2.2 T, corresponding to P_{loss}/P_{LH08}∼8. The full dataset is consistent with the theoretical prediction that magnetic shear in the NT edge inhibits access to ELMing H-mode regimes; all experimental pressure profiles are found to be at or below the infinite-n ballooning stability limit. Our present dataset also features edge pressure gradients in strong NT that are closer to an H-mode than a typical L-mode plasma, supporting the consideration of NT for reactor design.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2023 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos
Texto completo
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Imprimir
XML
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2023 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos