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Efficient Kα x-ray source from submillijoule femtosecond laser pulses operated at kilohertz repetition rate

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3 Author(s)
Serbanescu, C.G. ; Department of Electrical and Computer Engineering, University of Alberta, Edmonton, AB T6G 2V4, Canada ; Chakera, J.A. ; Fedosejevs, R.

Your organization might have access to this article on the publisher's site. To check, click on this link:http://dx.doi.org/+10.1063/1.2789676 

We report an efficient Cu Kα x-ray source produced by focusing submillijoule, 120 fs Ti:sapphire laser pulses on a solid copper target to a spot diameter of few microns. The experimental results show strong emission of Kα x-rays from solid targets from microplasmas created by p-polarized 0.2–0.3 mJ laser pulses at 1 kHz repetition rate. We have demonstrated Kα x-ray point source emission rates of 6.7×109 photons/s into sr at 1 kHz repetition rate. The source has an x-ray conversion efficiency into Cu Kα line emission of 3.2×10-5. The source has a measured size of ∼8 μm. Such a high repetition rate Kα x-ray source can be very useful for time resolved x-ray diffraction and radiographic applications.

Published in:

Review of Scientific Instruments  (Volume:78 ,  Issue: 10 )

Date of Publication:

Oct 2007

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