Enhanced fluorescence from x-ray line coincidence pumping of K-pumped Cl and Mg-pumped Ge plasmas

Joseph Nilsen; D. Burridge; L.M. R. Hobbs; D. Hoarty; P. Beiersdorfer; G. V. Brown; N. Hell; D. Panchenko; M. F. Gu; A. M. Saunders; H. A. Scott; R. A. London; P. Hatfield; M. P. Hill; L. Wilson; R. Charles; C. R. D. Brown; S. Rose

doi:10.1117/12.2528884

9 September 2019 Enhanced fluorescence from x-ray line coincidence pumping of K-pumped Cl and Mg-pumped Ge plasmas

Joseph Nilsen, D. Burridge, L.M. R. Hobbs, D. Hoarty, P. Beiersdorfer, G. V. Brown, N. Hell, D. Panchenko, M. F. Gu, A. M. Saunders, H. A. Scott, R. A. London, P. Hatfield, M. P. Hill, L. Wilson, R. Charles, C. R. D. Brown, S. Rose

Author Affiliations +

Proceedings Volume 11111, X-Ray Lasers and Coherent X-Ray Sources: Development and Applications XIII; 1111105 (2019) https://doi.org/10.1117/12.2528884
Event: SPIE Optical Engineering + Applications, 2019, San Diego, California, United States

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 decided to reinvestigate some of these schemes at the Orion laser facility with the goal to demonstrate enhanced fluorescence as a first step toward creating a laser. 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 of 40% on the 3d-2p line. As an alternative we also look at enhancing the 2p – 2s line in Ne-like Ge at 65Å 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 and recent experiments will be presented that show emission from a Ge plasma pumped by the Ly-α Mg line.

Conference Presentation

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Joseph Nilsen, D. Burridge, L.M. R. Hobbs, D. Hoarty, P. Beiersdorfer, G. V. Brown, N. Hell, D. Panchenko, M. F. Gu, A. M. Saunders, H. A. Scott, R. A. London, P. Hatfield, M. P. Hill, L. Wilson, R. Charles, C. R. D. Brown, and S. Rose "Enhanced fluorescence from x-ray line coincidence pumping of K-pumped Cl and Mg-pumped Ge plasmas", Proc. SPIE 11111, X-Ray Lasers and Coherent X-Ray Sources: Development and Applications XIII, 1111105 (9 September 2019); https://doi.org/10.1117/12.2528884

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