TY - JOUR
T1 - Experimental validation of a filament transport model in turbulent magnetized plasmas
AU - Carralero, D.
AU - Manz, P.
AU - Aho-Mantila, Leena
AU - Birkenmeier, G.
AU - Brix, M.
AU - Groth, M.
AU - Müller, H.W.
AU - Stroth, U.
AU - Vianello, N.
AU - Wolfrum, E.
AU - ASDEX Upgrade Team
AU - JET Contributors
AU - EUROfusion MST1 Team
PY - 2015
Y1 - 2015
N2 - In a wide variety of natural and laboratory magnetized
plasmas, filaments appear as a result of interchange
instability. These convective structures substantially
enhance transport in the direction perpendicular to the
magnetic field. According to filament models, their
propagation may follow different regimes depending on the
parallel closure of charge conservation. This is of
paramount importance in magnetic fusion plasmas, as high
collisionality in the scrape-off layer may trigger a
regime transition leading to strongly enhanced
perpendicular particle fluxes. This work reports for the
first time on an experimental verification of this
process, linking enhanced transport with a regime
transition as predicted by models. Based on these
results, a novel scaling for global perpendicular
particle transport in reactor relevant tokamaks such as
ASDEX-Upgrade and JET is found, leading to important
implications for next generation fusion devices.
AB - In a wide variety of natural and laboratory magnetized
plasmas, filaments appear as a result of interchange
instability. These convective structures substantially
enhance transport in the direction perpendicular to the
magnetic field. According to filament models, their
propagation may follow different regimes depending on the
parallel closure of charge conservation. This is of
paramount importance in magnetic fusion plasmas, as high
collisionality in the scrape-off layer may trigger a
regime transition leading to strongly enhanced
perpendicular particle fluxes. This work reports for the
first time on an experimental verification of this
process, linking enhanced transport with a regime
transition as predicted by models. Based on these
results, a novel scaling for global perpendicular
particle transport in reactor relevant tokamaks such as
ASDEX-Upgrade and JET is found, leading to important
implications for next generation fusion devices.
U2 - 10.1103/PhysRevLett.115.215002
DO - 10.1103/PhysRevLett.115.215002
M3 - Article
VL - 115
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 21
M1 - 215002
ER -