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.
|Publication status||Published - 2006|
|Event||33rd European Physical Society Conference on Plasma Physics 2006, EPS 2006 - , Italy|
Duration: 1 Jan 2006 → …
|Conference||33rd European Physical Society Conference on Plasma Physics 2006, EPS 2006|
|Period||1/1/06 → …|
All Science Journal Classification (ASJC) codes
- Atomic and Molecular Physics, and Optics
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.