X-ray measurements at high-power lasers

Published

May 1, 2009

Author(s)

Lawrence T. Hudson, C.I Szabo, Paul Indelicato, G.E. Gumberidze, G Holland, John F. Seely, Albert Henins, M Audebert, S. Bastiani-Ceccotti, E. Tabakhoff, E. Brambrink

Abstract

Conversion efficiencies of laser light into K x-ray radiation are used to characterize laser-solid interactions e.g. in measurements with back-lighter targets in Inertial Confinement Fusion research or in ultra short x-ray science where ultra short laser pulses are used to create x rays for investigation of dynamic processes on the femtosecond scale. In our measurements we observed high energy (few tens of keV) K x-ray radiation of element pairs created upon impact of a 1 ps, 100 J laser pulse on the target surface. The high-energy electrons created in this interaction ionise and excite the target material. We have used high purity alloy foils of Pd and Ag, as well as In and Sn and crystals of CsI and rare earth molybdates as target materials. Both constituents of these targets were simultaneously excited in one shot. The K x-ray radiation was dispersed and detected with the LCS (LULI Crystal Spectrometer), a Cauchois-type cylindrically bent transmission-crystal spectrometer. Measuring ratios in the x-ray spectra permits determination of relative conversion efficiencies for pairs of elements under identical laser-target interaction conditions.

Citation

Nuclear Instruments & Methods in Physics Research Section B-Beam Interactions With Materials and Atoms

Volume

169

Issue

072705

Pub Type

Journals

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Keywords

KeV, k x-ray, laser-solid interactions, molybdates

Citation

Hudson, L. , Szabo, C. , Indelicato, P. , Gumberidze, G. , Holland, G. , Seely, J. , Henins, A. , Audebert, M. , Bastiani-Ceccotti, S. , Tabakhoff, E. and Brambrink, E. (2009), X-ray measurements at high-power lasers, Nuclear Instruments & Methods in Physics Research Section B-Beam Interactions With Materials and Atoms, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=842572 (Accessed April 23, 2024)