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4 February 1988 Progress With Gain Measurements In Li-Like Ions At 15.4 Nm (A1XI) And 12.9 Nm (SiXII)
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The sequence of Li-like ions represents an attractive avenue to progress to laser action at soft X-ray wavelengths shorter than those of current X-ray lasers1,2 (see also Refs. 3-6). We are exploring the possibilities for laser action at 15.4 nm in Li-like A1XI and 12.9 nm in Li-like SiXII in a magnetically confined recombining plasma. A ti 1 kJ CO2 laser is focussed onto an aluminum or silicon target assembly and the resulting plasma confined in a solenoidal magnetic field of up to 90 kG. This approach is similar to our previous work on hydrogen-like carbon, CVI, which led to lasing action on the n = 3 to m = 2 transition at 18.2 nm. For lithium-like ions we measure a maximum gain-length (gL) on the 4f-3d transition, of gL Rs 3-4 at 15.4 nm and gL % 1-2 at 12.9 nm. The 18.2 nm laser has been applied to microscopy and first results from a soft X-ray laser microscope are presented.
© (1988) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
C. H. Skinner, D. Kim, A. Wouters, D. Voorhees, and S. Suckewer "Progress With Gain Measurements In Li-Like Ions At 15.4 Nm (A1XI) And 12.9 Nm (SiXII)", Proc. SPIE 0831, X-Rays from Laser Plasmas, (4 February 1988);

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