High Energy X-ray Source Generation by Short Pulse High Intensity Lasers.

Park, H. S. ; Koch, J. A. ; Landen, O. L. ; Phillips, T. W. ; Goldsack, T.

Technical Information Center Oak Ridge Tennessee

关键词: Lasers;    X-ray sources;    Implosions;    Planar structures;    Short pulses;   

RP-ID  :  DE200415006459

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

We are studying the feasibility of utilizing K(alpha) x-ray sources in the range of 20 to 100 keV as a backlighters for imaging various stages of implosions and high areal density planar samples driven by the NIF laser facility. The hard x-ray K(alpha) 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 K(alpha) 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 K(alpha) source. We find that the K(alpha) conversion efficiency from the laser energy at 22 keV is(approx) 3 x 10(sup -4).