Giant magnetic fields and relativistic electron transport in dense, hot plasmas created on solid targets

Intense,femtosecond laser pulses generate relativistic electron pulses,important for many applications\cite{Drakebook}. In this paper, we present a femtosecond time-resolved and micrometer space resolved giant magnetic fields generated by 10$^{19}$ W cm$^{-2}$, 800 nm, 30 fs, high intensity contrast laser pulses in using pump-probe Cotton Mouton polarimetry\cite{ChatterjeeRSI2014}. The space and time resolved maps of the magnetic fields at the front and rear of targets reveal turbulence in the magnetic fields \cite{MondalPNAS2012}. We also present data from shadowgraphy and Cherenkov emission along with model calculations to build up a picture of the transport process.\newline $[1]$ Drake R. P. \textit{High-Energy-Density Physics} (Springer-Verlag, Berlin Heidelberg, 2006).\newline [2] Chatterjee G. \textit{et al.} \textit{Rev. Sci. Instr.} \textbf{85,}, 013505 (2014).\newline [3]Mondal S. \textit{et al.} . \textit{Proc. Natl. Acad. Sci. USA} \textbf{109,} 8011 (2012).