J.-C. Gauthier, et al.
J. Phys. IV France 133 (2006) 529-531
Spectroscopic diagnostics for multi-TW laser-produced plasmasJ.A. Cobble, J.C. Fernández, B.M. Hegelich, K.A. Flippo and D.C. Gautier
Los Alamos National Laboratory
Data from a pinhole camera and a transmission grating spectrograph are used in multi-TW laser irradiance of thin metal films to assess the maximum laser spot size and to show tenths of a percent conversion of laser light to K-, L-, and M-band x rays. The distribution of target debris, an operational issue for the survivability of an unshielded parabola in a large laser system, is revealed by x-ray fluorescence measurements of witness samples. At the 25-J, 30-TW level, we find little evidence of damage to the f/3 parabola with an angle of incidence on target greater than 22.
© EDP Sciences 2006