High-intensity laser-plasma interaction with wedge-shaped-cavity targets

Theobald, W.; Ovchinnikov, V.; Ivancic, S.; Eichman, B.; Nilson, P. M.; Delettrez, J. A.; Yan, R.; Li, G.; Marshall, F. J.; Meyerhofer, D. D.; Myatt, J. F.; Ren, C.; Sangster, T. C.; Stoeckl, C.; Zuegel, J. D.; Van Woerkom, L.; Freeman, R. R.; Akli, K. U.; Giraldez, E.; Stephens, R. B.
October 2010
Physics of Plasmas;Oct2010, Vol. 17 Issue 10, p103101
Academic Journal
High-intensity, short-pulse laser-interaction experiments with small-mass, wedge-shaped-cavity Cu targets are presented. The diagnostics provided spatially and spectrally resolved measurements of the Cu Kα line emission at 8 keV. The conversion efficiency of short-pulse laser energy into fast electrons was inferred from the x-ray yield for wedge opening angles between 30° and 60° and for s- and p-polarized laser irradiation. Up to 36±7% conversion efficiency was measured for the narrowest wedge with p-polarization. The results are compared with predictions from two-dimensional particle-in-cell simulations.


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