1. Optimization of X-ray emission from a laser-produced plasma in a narrow wavelength band
- Author
-
Eric Louis, G.E. van Dorssen, and Frederik Bijkerk
- Subjects
Materials science ,business.industry ,Energy conversion efficiency ,X-ray ,Plasma ,Electron ,engineering.material ,Condensed Matter Physics ,Laser ,Atomic and Molecular Physics, and Optics ,law.invention ,Wavelength ,Coating ,law ,engineering ,Optoelectronics ,Electrical and Electronic Engineering ,business ,Power density - Abstract
The X-ray emission from laser-produced plasmas at an X-ray wavelength of approximately 10.4 nm was measured for Al and Gd target materials. The laser power density on the target surface was varied between 1.5 × 1010 and 3 × 1012 W/cm2 to obtain different electron temperatures. The output from the plasma was measured using an X-ray reflecting Pd-C multilayer coating as a wavelength-selective element and a diamond photoconductive detector. The emission at 10.4 nm is strongest at the low end of the power density range investigated. A strong increase is found for Al targets due to a contribution of line radiation, which is not present in the Gd plasmas. The measured conversion efficiency for Al plasmas was (4.5 ± 1)% in a 3% bandwidth at an X-ray wavelength of 10.4 nm.
- Published
- 1992