A V Karelin

High-pressure He-Cd and He-Zn lasers pumped by a hard ionizer

This paper presents the results of theoretical and experimental studies on high-pressure He-Cd and He-Zn lasers. It is shown that using the hard ionizer approximation makes it possible to readily and efficiently simulate the plasma chemical processes that occur in the active media of high-pressure lasers pumped by electron and ion beams as well as by nuclear reaction products in electron-beam experiments. Laser oscillation was achieved at λ = 325, 441.6, 533.7, and 537.8 nm for the cadmium ion and at X = 610.3 nm for the zinc ion.

Kinetics of the active media of nuclear-pumped lasers

Numerical simulation of active media nuclear-pumped lasers on noble gases and their mixtures with metal vapors are presented. Prospects of creation of high-power short-wavelength nuclear-pumped excimer lasers are discussed.

Maximum efficiency of a Penning plasma laser on neon

A great number o recent papers were devoted to the investigation or a Penning plasma laser under the conditions or electron-beam and nuclear puinpin,g and to the experimental and theoretical investigations or plasmochemical and radiation processes in the active medium (see , tor example , [1 1 ) . But the question about maximal erriciency o the laser is opened yet and this is the main purpose or the paper.

Optimization of generation parameters of the wide-aperture Xe laser pumped by an electron beam

The data on optimization of output parameters (output energy and laser efficiency) and distribution of laser radiation energy on the output window cross-section of the wide- aperture Xe-laser pumped by a radially-convergent e-beam with pulse duration of approximately 0,5 microsecond(s) at the FWHM were obtained. It is shown experimentally, that the requirement of homogeneity of output laser radiation across the aperture limits the energy deposition value from below, and the requirement of maximal laser efficiency restricts the energy deposition value from above. In the experiment the maximal laser efficiency as 1,5 - 2% was obtained at the specific energy deposition of 12 - 14 mJ./cm3atm. The calculations show that with cleaning of the operating mixture from molecular gases impurities the laser efficiency and energy output can be increased in 1.5 - 2 times. The negative influence of impurity gases at optimum range of pumping power is decreasing of electron temperature and as a consequence decreasing of the upper laser level pumping.

Kinetic laser model on 3s-2p transition of Li-like nitrogen ion

A non-stationary kinetic model of a plasma laser with wavelength lambda equals 26.5 nm on transition 3s yields 2p of Li-like ion of nitrogen N4+ is created. It is shown, that lasing is possible at the leading edge of pump pulse. As a result of simulation there are optimum lasing conditions.