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Persistent URL http://purl.org/net/epubs/work/37003
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Record Id 37003
Title Fast-electron transport and heating of solid targets in high-intensity laser interactions measured by K alpha fluorescence
Abstract We present experimental results on fast-electron energy deposition into solid targets in ultrahigh intensity laser-matter interaction. X-ray K alpha emission spectroscopy with absolute photon counting served to diagnose fast-electron propagation in multilayered targets. Target heating was measured from ionization-shifted K alpha emission. Data show a 200 mu m fast-electron range in solid Al. The relative intensities of spectrally shifted Al K alpha lines imply a mean temperature of a few tens of eV up to a 100 mu m depth. Experimental results suggest refluxing of the electron beam at target rear side. They were compared with the predictions of both a collisional Monte Carlo and a collisional-electromagnetic, particle-fluid transport code. The validity of the code modeling of heating in such highly transient conditions is discussed.
Keywords CLF 2006-2007
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Language English (EN)
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Journal Article Phys Rev E 73, no. 4 (2006): 046402. doi:10.1103/PhysRevE.73.046402 2006