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

Willingale, L. and Thomas, A. G. R. and Nilson, P. M. and Kaluza, M. C. and Bandyopadhyay, S. and Dangor, A. E. and Evans, R. G. and Fernandes, P. and Haines, M. G. and Kamperidis, C. and Kingham, R. J. and Minardi, S. and Notley, M. and Ridgers, C. P. and Rozmus, W. and Sherlock, M. and Tatarakis, M. and Wei, M. S. and Najmudin, Z. and Krushelnick, K. (2011) Proton probe measurement of fast advection of magnetic fields by hot electrons. Plasma Physics and Controlled Fusion, 53 (12). ISSN 0741-3335

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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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Journal Article
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Plasma Physics and Controlled Fusion
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19 May 2016 13:54
Last Modified:
22 Nov 2022 03:16