The motional Stark effect diagnostic reliably measures significant deviations in safety factor profile during DIII-D sawteeth
W. W. Heidbrink, B.S. Victor
Abstract
Motional Stark effect data acquired during large fast-ion stabilized sawteeth are critically reexamined. The safety factor at the sawtooth crash changes by Δq≃0.15, much more than any likely errors.
Topics & Concepts
Sawtooth wavePhysicsStark effectDIII-DSafety factorAtomic physicsPlasma diagnosticsPlasmaNuclear physicsTokamakQuantum mechanicsSpectral lineComputer scienceComputer visionMagnetic confinement fusion researchLaser-Plasma Interactions and DiagnosticsNuclear Physics and Applications