Population Inversion and Gain Measurements for X-Ray Laser Development in Magnetically Confined Plasma Column in Fiscal Year 1984.
Annual rept. 1 Nov 83-31 Oct 84,
PRINCETON UNIV N J PLASMA PHYSICS LAB
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This report covers X-ray laser development in magnetically confined plasmas, as well as in expanding recombining plasma columns using time resolved soft X-ray monochromators. Experiments with both solid and gas targets resulted in gain measurements for hydrogen-like Carbon6 CVI ions and population inversion measurements for lithium-like Neon8 NeVIII ions. Our most recent results, involving carbon disc targets in a 90 kGauss field with a 300 Joule carbon dioxide laser pulse, in which a one-pass gain of kl 6.5 enhancement of stimulated emission over spontaneous emission about 100 was obtained for CVI 182A are presented. Results of a gain kl 3.0 k approx. 7.5cm for thick carbon fiber targets are also presented. Population inversions of NeVIII ions as a function of initial gas pressure are also discussed, as well as an overview of the instrumentation, experimental setup, and target configurations used. Keywords X ray laser XUV laser.
- Lasers and Masers
- Plasma Physics and Magnetohydrodynamics