RT Journal Article
T1 Enhanced Production of Runaway Electrons during a Disruptive Termination of Discharges Heated with Lower Hybrid Power in the Frascati Tokamak Upgrade
A1 Martín Solís, José Ramón
A1 Esposito, B.
A1 Sánchez, Raúl
A1 Poli, F. M.
A1 Panaccione, L.
AB We report on the observation of a large production of runaway electrons during a disruptive termination of discharges heated with lower-hybrid waves at the Frascati Tokamak Upgrade. The runaway current plateaus, which can carry up to 80% of the predisruptive current, are observed more often than in normal Ohmic disruptions. The largest runaway currents correspond to the slowest plasma current decay rates. This trend is opposite to what is observed in most tokamaks. We attribute this anomalous behavior to the acceleration of the preexistent wave-resonant suprathermal electrons during the disruption decay phase. These results could be relevant for the operation of the ITER tokamak whenever a sizeable amount of lower-hybrid power is made available.
PB The American Physical Society
SN 0031-9007
YR 2006
FD 2006-10-20
LK https://hdl.handle.net/10016/8869
UL https://hdl.handle.net/10016/8869
LA eng
NO 4 pages, 4 figures.-- PACS nrs.: 52.55.Fa, 52.35.Py, 52.50.Sw, 52.55.Pi.
NO Research supported in part by Spanish DGES ProjectNo. FTN2003-04587. This work was also supported by the Euratom Communities under the contract of association between EURATOM and ENEA.
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RD 27 jul. 2024