7 January 2004 High-energy x-ray source generation by short-pulse high-intensity lasers
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Abstract
We are studying the feasibility of utilizing Kα x-ray sources in the range of 20 to 100 keV as a backlighters for imaging various stages of implosions and high aerial density planar samples driven by the NIF laser facility. The hard x-ray Kα sources are created by relativistic electron plasma interactions in the target material after a radiation by short pulse high intensity lasers. In order to understand Kα source characteristics such as production efficiency and brightness as a function of laser parameters, we have performed experiments using the 10 J, 100 fs JanUSP laser. We utilized single-photon counting spectroscopy and x-ray imaging diagnostics to characterize the Kα source. We find that the Kα conversion efficiency from the laser energy at 22 keV is ~3 x 10-4.
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Hye-Sook Park, Hye-Sook Park, Jeffrey A. Koch, Jeffrey A. Koch, Otto L. Landen, Otto L. Landen, Thomas W. Phillips, Thomas W. Phillips, Tim J. Goldsack, Tim J. Goldsack, E. Clark, E. Clark, Richard Eagleton, Richard Eagleton, Ray D. Edwards, Ray D. Edwards, } "High-energy x-ray source generation by short-pulse high-intensity lasers", Proc. SPIE 5196, Laser-Generated and Other Laboratory X-Ray and EUV Sources, Optics, and Applications, (7 January 2004); doi: 10.1117/12.508663; https://doi.org/10.1117/12.508663
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