Control of post-disruption runaway electron beams in DIII-Da)

摘要: Recent experiments in the DIII-D tokamak have demonstrated real-time control and dissipation of post-disruption runaway electron (RE) beams. In event that disruption avoidance, control, mitigation schemes fail to avoid or suppress RE generation, active beam may be an important line defense prevent rapid, localized deposition energy onto vulnerable vessel sections. During immediately after current quench, excessive radial compression beams is avoided by a combination techniques, improving likelihood surviving this dynamic period without fast termination. Once stabilized, are held steady state (out ohmic flux limit) with application plasma position controls. Beam interaction wall minimized avoiding distinct thresholds for enhanced at small large radii, corresponding inner outer limiter interaction, respectively. Staying within “safe zone” between those allows sustainment long-lived, quiescent The total population then dissipated gradually controlled ramp-down current.