Numerical simulation, comparison with experiments, and potentialities of Mn vapour lasers pumped by a kilovolt electron beam

Dissociative excitation of the manganese atom quartet levels by collisions e-MnBr2

“…This is particularly true for electronbeam plasma devices where controlled energies of primary electrons may vary widely. In particular, theoretical analysis of manganese-vapor lasers pumped with a kilovolt-range electron beam has shown that 'lasers pumped with kilovoltrange electron beams surpass gas discharge systems by one or two orders of magnitude in terms of effectiveness and laser energy release, additionally being capable of effective generation with a wide variety of atoms and ions in a wide range of wavelength' (Arlantsev et al 1996).…”

“…It should be noted that computed values of manganese atom excitation and ionization cross-sections used in (Arlantsev et al 1996) were obtained using the semi-empirical formula and were corrected using later experimental findings (Mel'nikov et al 1981). The study (Mel'nikov et al 1981) was one of the first experiments performed using the method of extended crossing beams.…”

TlII excitation cross-sections in collisions of slow electrons with thallium atoms

“…A still greater deviation from Maxwell distribution occurs when an active medium is pumped by an electron beam. Arlantsev et al (1996) discusses the potential performance of manganese-vapor lasers with an active medium pumped by an electron beam of kilovolt energy magnitude. A numerical simulation method was applied, with a physical and mathematical model put forward based on a joint solution of equations for electron energy distribution function, point laser kinetics and plasma relaxation in inter-pulse periods.…”

“…In beam plasma, energy is redistributed between particles primarily as a consequence of collisions between electrons and heavy particles (atoms, ions) with characteristic excitation and ionization cross-sections. The respective quantities were determined (Arlantsev et al 1996) based on values calculated using Drawin's formula (Drawin 1961) and adjusted to take into account the findings from a more recent experiment (Mel 'nikov et al 1981).…”

Excitation of 5 S, 5 P, and 5 D levels of the iron atom by slow electrons

“…This is connected with the possibility of pumping the active medium by an electron beam with energies of several kiloelectron volts. The potential for such a laser based on manganese vapor was discussed earlier in [8], where it was shown that "the efficiency and laser energy extraction from a laser pumped by a kilovolt electron beam are one to two orders of magnitude better than for gas-discharge systems." Furthermore, such pumping makes it possible to overcome limitations on excitation of high-lying levels connected with insufficiently high electron temperature in conventional discharges.…”