Measurements of fast electron scaling generated by petawatt laser systems

T. Tanimoto, H. Habara, R. Kodama, M. Nakatsutsumi, K.A. Tanaka, K.L. Lancaster, J.S. Green, R.H.H. Scott, M. Sherlock, P.A. Norreys, R.G. Evans, M.G. Haines, Satyabrata Kar, Matthew Zepf, J. King, T. Ma, M.S. Wei, T. Yabuuchi, F.N. Beg, M.H. KeyP. Nilson, R.B. Stephens, H. Azechi, K. Nagai, T. Norimatsu, K. Takeda, J. Valente, J.R. Davies

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Abstract

Fast electron energy spectra have been measured for a range of intensities between 10(18) and 10(21) W cm(-2) and for different target materials using electron spectrometers. Several experimental campaigns were conducted on petawatt laser facilities at the Rutherford Appleton Laboratory and Osaka University, where the pulse duration was varied from 0.5 to 5 ps relevant to upcoming fast ignition integral experiments. The incident angle was also changed from normal incidence to 40 degrees in p-polarized. The results confirm a reduction from the ponderomotive potential energy on fast electrons at the higher intensities under the wide range of different irradiation conditions.
Original languageEnglish
Article number062703
JournalPhysics of Plasmas
Volume16
Issue number6
DOIs
Publication statusPublished - 2009

ASJC Scopus subject areas

  • Condensed Matter Physics

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