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[en] Short communication

[en] A brief article outlines the use of a CO₂ laser beam for heating various TLD phosphors. The advantages of laser heating over conventional heating of TLDs are outlined. (U.K.)

[en] Published in summary form only

[en] A brief summary is given of the physics of the problem of laser-mater interaction. In the limit of very low intensities, the absorption is dominated by inverse bremsstrahlung. At higher intensities and in a homogeneous medium, there are several parametric processes that may become significant. The threshold intensities for the onset of several parametric instabilities are listed. Results for threshold intensities and growth rates just above threshold are briefly discussed for an inhomogeneous plasma. A brief description of resonance absorption in an inhomogeneous plasma is included. (author)

[en] Resonance saturation is an efficient and rapid method of coupling laser energy into a gaseous medium. In the case of a plasma superelastic collision quenching of the laser maintained resonance state population effectively converts the laser beam energy into translational energy of the free electrons. Ionization of the laser pumped species rapidly follows as a result of both the elevated electron temperature and the effective reduction of the ionization energy for those atoms maintained in the resonance state by the laser radiation. This method of coupling laser energy into a plasma has several advantages over inverse bremsstrahlung and could therefore be applicable to several areas of current interest. 14 references

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No abstract available