Runaway current plateau formation during disruptions in the FTU tokamak

J.R. Martín-Solís, B. Esposito, R. Sánchez, F.M. Poli, L. Panaccione

Research output: Contribution to conferencePaper

Abstract

Observations of a large production of runaway electrons during disruptive events in the FTU tokamak will be reported. The formation of a runaway current plateau is observed during the start-up and flat-top phase of low density OH (ohmic) disruptions as well as during LH (lower hybrid) heated disruptions, carrying up to ∼ 80% of the predisruptive plasma current. The largest runaway currents are correlated to the slowest plasma current decay rates, trend which is opposite to that observed in most tokamaks. We attribute these features to the acceleration of pre-existent suprathermal electrons during the decay phase of the disruption. These results could be relevant for the operation of next step devices such as ITER, in case that a disruption occurs during LHCD.
Original languageEnglish
Publication statusPublished - 2006
Externally publishedYes
Event33rd European Physical Society Conference on Plasma Physics 2006, EPS 2006 - , Italy
Duration: 1 Jan 2006 → …

Conference

Conference33rd European Physical Society Conference on Plasma Physics 2006, EPS 2006
CountryItaly
Period1/1/06 → …

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All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

Cite this

Martín-Solís, J. R., Esposito, B., Sánchez, R., Poli, F. M., & Panaccione, L. (2006). Runaway current plateau formation during disruptions in the FTU tokamak. Paper presented at 33rd European Physical Society Conference on Plasma Physics 2006, EPS 2006, Italy.