TY - JOUR
T1 - Helicity-flux-driven α effect in laboratory and astrophysical plasmas
AU - Ebrahimi, F.
AU - Bhattacharjee, A.
PY - 2013/12/1
Y1 - 2013/12/1
N2 - The constraint imposed by magnetic helicity conservation on the α effect is considered for both magnetically and flow dominated self-organizing plasmas. Direct numerical simulations are presented for a dominant contribution to the α effect, which can be cast in the functional form of a total divergence of an averaged helicity flux, called the helicity-flux-driven α (Hα) effect. Direct numerical simulations of the Hα effect are presented for two examples - the magnetically dominated toroidal plasma unstable to tearing modes, and the flow-dominated accretion disk.
AB - The constraint imposed by magnetic helicity conservation on the α effect is considered for both magnetically and flow dominated self-organizing plasmas. Direct numerical simulations are presented for a dominant contribution to the α effect, which can be cast in the functional form of a total divergence of an averaged helicity flux, called the helicity-flux-driven α (Hα) effect. Direct numerical simulations of the Hα effect are presented for two examples - the magnetically dominated toroidal plasma unstable to tearing modes, and the flow-dominated accretion disk.
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U2 - 10.1103/PhysRevLett.112.125003
DO - 10.1103/PhysRevLett.112.125003
M3 - Article
C2 - 24724656
AN - SCOPUS:84897398048
SN - 0031-9007
VL - 112
JO - Physical review letters
JF - Physical review letters
IS - 12
M1 - 125003
ER -