NDLI: Ionizing mechanisms in a cesium plasma irradiated with a ruby laser

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Ionizing mechanisms in a cesium plasma irradiated with a ruby laser

Content Provider	NASA Technical Reports Server (NTRS)
Author	Shimada, K. Robinson, L. B.
Copyright Year	1975
Description	A cesium filled diode--laser plasmadynamic converter was built to investigate the feasibility of converting laser energy to electrical energy at large power levels. Experiments were performed with a pulsed ruby laser to determine the quantity of electrons and cesium ions generated per pulse of laser beam and to determine the output voltage. A current density as high as 200 amp/sq cm from a spot of approximately 1 sq mm area and an open circuit voltage as high as 1.5 volts were recorded. A qualitative theory was developed to explain these results. In the operation of the device, the laser beam evaporates some of the cesium and ionizes the cesium gas. A dense cesium plasma is formed to absorb further the laser energy. Results suggest that the simultaneous absorption of two ruby laser photons by the cesium atoms plays an important role in the initial ionization of cesium. Inverse bremsstrahlung absorption appears to be the dominant mechanism in subsequent processes. Recombinations of electrons and cesium ions appear to compete favorably with the simultaneous absorption of two photons.
File Size	3598927
Page Count	21
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19750019827
Archival Resource Key	ark:/13960/t0tr0pg49
Language	English
Publisher Date	1975-06-01
Access Restriction	Open
Subject Keyword	Plasma Physics Laser Outputs Bremsstrahlung Recombination Reactions Energy Conversion Cesium Plasma Ruby Lasers Current Density Pulsed Lasers Laser Applications Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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