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Measuring fast electron spectra and laser absorption in relativistic laser-solid interactions using differential bremsstrahlung photon detectors.
Journal article published in 2013 by
Scott Rhh,
Rh H. H. Scott 
,
El L. Clark,
Clark El,
F. Pe?rez,
F. Pérez,
Mj J. V. Streeter,
Streeter Mjv,
Davies Jr,
J. R. Davies,
Santos Jj,
Hp-P. Schlenvoigt,
Jj J. Santos,
Lancaster Kl,
S. Hulin
and other authors.
,
El L. Clark,
Clark El,
F. Pe?rez,
F. Pérez,
Mj J. V. Streeter,
Streeter Mjv,
Davies Jr,
J. R. Davies,
Santos Jj,
Hp-P. Schlenvoigt,
Jj J. Santos,
Lancaster Kl,
S. Hulin
and other authors.
Abstract
A photon detector suitable for the measurement of bremsstrahlung spectra generated in relativistically intense laser-solid interactions is described. The Monte Carlo techniques used to extract the fast electron spectrum and laser energy absorbed into forward-going fast electrons are detailed. A relativistically intense laser-solid experiment using frequency doubled laser light is used to demonstrate the effective operation of the detector. The experimental data were interpreted using the 3-spatial-dimension Monte Carlo code MCNPX [D. Pelowitz, MCNPX User's Manual Version 2.6.0, Los Alamos National Laboratory, 2008], and the fast electron temperature found to be 125 keV.