Population inversion and gain measurements for X-ray laser development in magnetically confined plasma column in fiscal year 1984
Abstract
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 Carbon(6+) (CVI) ions and population inversion measurements for lithium-like Neon(8+) (NeVIII) ions. Our most recent results, involving carbon disc targets in a 90 k Gauss 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. 7.5/cm) 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.
- Publication:
-
Princeton Univ. Report
- Pub Date:
- March 1985
- Bibcode:
- 1985prnc.rept.....S
- Keywords:
-
- Carbon Dioxide Lasers;
- Carbon Fibers;
- Disks (Shapes);
- Far Ultraviolet Radiation;
- Laser Plasmas;
- Laser Targets;
- Magnetic Field Configurations;
- Monochromators;
- Neon;
- Plasma Control;
- Population Inversion;
- Target Thickness;
- Ultraviolet Lasers;
- X Ray Lasers;
- Amplification;
- Carbon Lasers;
- Emission Spectra;
- Gas Pressure;
- Ions;
- Optimization;
- Lasers and Masers