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

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

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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...

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Bibliographic Details
Main Authors: Willingale, L, Thomas, A, Nilson, P, Kaluza, M, Bandyopadhyay, S, Dangor, A, Evans, R, Fernandes, P, Haines, MG, Kamperidis, C, Kingham, R, Minardi, S, Notley, M, Ridgers, C, Rozmus, W, Sherlock, M, Tatarakis, M, Wei, MS, Najmudin, Z, Krushelnick, K
Format: Journal article
Language:English
Published: 2011
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Summary: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 ≈ 10. © 2011 IOP Publishing Ltd.

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