Proton probe measurement of fast advection of magnetic fields by hot electrons
- 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.
DOIAbstract
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
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