Proton probe measurement of fast advection of magnetic fields by hot electrons

作者：Willingale L^*; Thomas A G R; Nilson P M; Kaluza M C; Bandyopadhyay S; Dangor A E; Evans R G; Fernandes P; Haines M G; Kamperidis C; Kingham R J; Minardi S; Notley M; Ridgers C P; Rozmus W; Sherlock M; Tatarakis M; Wei M S; Najmudin Z; Krushelnick K

来源：Plasma Physics and Controlled Fusion, 2011, 53(12): 124026.

DOI：10.1088/0741-3335/53/12/124026

A laser generated proton beam was used to measure the megagauss strength self-generated magnetic fields from a nanosecond laser interaction with an aluminum target. At intensities of 10(15) W cm(-2), the significant hot electron production and strong heat fluxes result in non-local transport becoming important to describe the magnetic field dynamics. Two-dimensional implicit Vlasov-Fokker-Planck modeling shows that fast advection of the magnetic field from the focal region occurs via the Nernst effect at significantly higher velocities than the sound speed, (v)N/c(s) approximate to 10.

• 出版日期2011-12