5 October 2011 Spectroscopic studies of hard x-ray free-electron laser-heated foils at 1016 Wcm-2 irradiances
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We report a recent experiment where the first hard x-ray beam line, X-ray Pump Probe (XPP) instrument using the SLAC National Accelerator Laboratory's Linac Coherent Light Source (LCLS) free electron laser, was used to heat thin foils to high energy densities ~ 107 J/cm3. An intense 9 keV, 60 fs (FWHM) duration beam with energy of 2 - 4 mJ at the XPP beam line was focused using beryllium lenses to an irradiance approaching 1016 Wcm-2. Targets of 0.5 - 3.5 μm thick foils of Ag and Cu were studied using a suite of diagnostics including Fourier Domain Interferometry, energy calorimetry and grating and crystal spectrometers. The experimental details and spectroscopic results from the campaign will be described. Preliminary results indicate that the target is heated relatively uniformly to a temperature lower than 20 eV.
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J. Dunn, J. Dunn, R. Shepherd, R. Shepherd, A. Graf, A. Graf, A. Steel, A. Steel, J. Park, J. Park, S. J. Moon, S. J. Moon, R. W. Lee, R. W. Lee, P. Audebert, P. Audebert, A. Levy, A. Levy, M. Gauthier, M. Gauthier, J. Fuchs, J. Fuchs, D. M. Fritz, D. M. Fritz, M. Cammarata, M. Cammarata, D. Milathianaki, D. Milathianaki, H. J. Lee, H. J. Lee, B. Nagler, B. Nagler, C. Fourment, C. Fourment, F. Deneuville, F. Deneuville, G. Williams, G. Williams, M. Fajardo, M. Fajardo, J. Gaudin, J. Gaudin, S. Vinko, S. Vinko, O. Ciricosta, O. Ciricosta, J. Wark, J. Wark, H. K. Chung, H. K. Chung, } "Spectroscopic studies of hard x-ray free-electron laser-heated foils at 1016 Wcm-2 irradiances", Proc. SPIE 8140, X-ray Lasers and Coherent X-ray Sources: Development and Applications IX, 81400O (5 October 2011); doi: 10.1117/12.895264; https://doi.org/10.1117/12.895264

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