Negative-Triangularity Turbulence Suppression in a Compact Spherical-Tokamak Breeder: Nonlinear Gyrokinetics of the Quiet Operating Point

Zenodo (CERN European Organization for Nuclear Research) 2026 Preprint Open access

Read full text
Authors: Priyanca Ford, G L Kulcinski
DOI: 10.5281/zenodo.22132098
Cited by: 2
References: 6

Abstract

Nonlinear gyrokinetics of the compact spherical-tokamak breeder at the frozen negative-triangularity design point. Nonlinear CGYRO with kinetic electrons shows negative triangularity cutting ion-scale (ITG+TEM) transport by 40-45 percent versus a positive-triangularity twin, with the operating point quiet and subcritical; electron-scale runs show 79-80 percent ETG suppression. Direction corroborated against TCV and DIII-D. Reduced electron mass and design-target caveats stated openly.

Fields of Study & Subjects

Magnetic confinement fusion research Ionosphere and magnetosphere dynamics Inertial Sensor and Navigation

Publication details

Journal / source
Zenodo (CERN European Organization for Nuclear Research)
Publication date
28 August 2026
Language
EN
Document type
Preprint