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A numerical technique is established for analyzing the experimental data from photoplasma density measurements. The simultaneous effects and relative importance of photo-ionization, diffusion, attachment, and recombination are considered for a typical laser media. The results suggest that the initial diffusion of electrons plays an important role in uv preionized C02 laser systems. The effects of gas mixture and pressure on the generation and penetration of uv radiation for a spark source is also determined.On ttablit une proctdure numtrique pour l'analyse des donntes exptrimentales provenant de mesures de densitt dans un photo-plasma. Les effets simultants et I'importance relative de la photo-ionisation, de la diffusion, des attachements et des recombinaisons sont considtrts, dans le cas d'un milieu laser typique. Les rtsultats indiquent que la diffusion initiale d'tlectrons joue un r6le important dans les systkmes laser C02 pr@ionisCs par ultraviolet. On determine aussi les effets du mtlange gazeux et de la pression sur le production et la ptnttration du rayonnement ultraviolet, pour une source a Ctincelle.[Traduit par le journal]Can. J. Phys. 62. 992 (1984)

The design and performance of a capacitance manometer for use in corrosive gas laser environments is presented. This simple and inexpensive isolating device can be quickly fabricated in any machine shop, and permits the utilization of ordinary non-passivated pressure measurement apparatus or gauges in any gas system, irrespective of the corrosiveness.

It is shown that diffraction gratings of arbitrary groove profile can be analyzed analytically. The analytical method is then used to obtain an optimized groove profile.