Magnetic cavitation and the reemergence of nonlocal transport in laser plasmas.
We present the first fully kinetic Vlasov-Fokker-Planck simulations of nanosecond laser-plasma interactions including self-consistent magnetic fields and hydrodynamic plasma expansion. For the largest magnetic fields externally applied to long-pulse laser-gas-jet experiments (12 T) a significant degree of cavitation of the B field (>40%) will be shown to occur from the laser-heated region in under half a nanosecond. This is due to the Nernst effect and leads to the reemergence of nonlocality even if the initial value of the magnetic field strength is sufficient to localize the transport.
Ridgers
C P
CP
Blackett Laboratory, Imperial College London, SW7 2BZ, United Kingdom.
Kingham
R J
RJ
Thomas
A G R
AG