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Enhanced fluorescence from x-ray line coincidence pumping of K-pumped Cl and Mg-pumped Ge plasmas
Author(s): 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
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Paper 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.

Paper Details

Date Published: 9 September 2019
PDF: 6 pages
Proc. SPIE 11111, X-Ray Lasers and Coherent X-Ray Sources: Development and Applications XIII, 1111105 (9 September 2019); doi: 10.1117/12.2528884
Show Author Affiliations
Joseph Nilsen, Lawrence Livermore National Lab. (United States)
D. Burridge, AWE plc (United Kingdom)
L.M. R. Hobbs, AWE plc (United Kingdom)
D. Hoarty, AWE plc (United Kingdom)
P. Beiersdorfer, Lawrence Livermore National Lab. (United States)
G. V. Brown, Lawrence Livermore National Lab. (United States)
N. Hell, Lawrence Livermore National Lab. (United States)
D. Panchenko, Lawrence Livermore National Lab. (United States)
M. F. Gu, Univ. of California, Berkeley (United States)
A. M. Saunders, Lawrence Livermore National Lab. (United States)
H. A. Scott, Lawrence Livermore National Lab. (United States)
R. A. London, Lawrence Livermore National Lab. (United States)
P. Hatfield, Imperial College (United Kingdom)
M. P. Hill, AWE plc (United Kingdom)
L. Wilson, AWE plc (United Kingdom)
R. Charles, AWE plc (United Kingdom)
C. R. D. Brown, AWE plc (United Kingdom)
S. Rose, Imperial College (United Kingdom)


Published in SPIE Proceedings Vol. 11111:
X-Ray Lasers and Coherent X-Ray Sources: Development and Applications XIII
Annie Klisnick; Carmen S. Menoni, Editor(s)

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