Enhanced Fluorescence from X-Ray Line Coincidence Pumping
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Author/Creator ORCID
Date
2020-03-07
Type of Work
Department
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Citation of Original Publication
Nilsen, J. et al. (2020). Enhanced Fluorescence from X-Ray Line Coincidence Pumping. In: Kozlová, M., Nejdl, J. (eds) X-Ray Lasers 2018. ICXRL 2018. Springer Proceedings in Physics, vol 241. Springer, Cham. https://doi.org/10.1007/978-3-030-35453-4_5
Rights
This work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.
Public Domain Mark 1.0
Public Domain Mark 1.0
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Abstract
Many resonant photo-pumped X-ray laser schemes that use a strong pump line such as Ly-α or He-α to populate the upper laser state of a separate lasing material have been proposed over the last four decades but none have been demonstrated. As a first step to creating a photo-pumped X-ray laser we have decided to reinvestigate some of these schemes at the Orion laser facility with the goal to show enhanced fluorescence. In particular we look at using the Ly-α or He-α K lines to pump the 1s–3p and 4p transitions in H-like Cl and see fluorescence on the 4f–3d line at 65 Å and the 3d–2p line at 23 Å. Preliminary experiments are presented that show a modest enhancement. As an alternative we also look at enhancing the 2p–2s line in Ne-like Ge at 65 Å using the Ly-α Mg line to photo-pump the 2s–3p line of Ne-like Ge. Calculations are presented that suggest modest enhancements of 2.5.