Electron-beam-controlled N₂O laser

Abstract

The predictions of a multichannel Landau-Zener model, which includes Taulbjerg'sf;,, factor, for single-electron capture by multicharged ions, have been compared with different kinds of experimental results (electron, x, u v and energy gain spectroscopies).A reasonable agreement has been found for the populations of individual nl sublevels of capture when the electron-core interaction prevails over the I Stark mixing and when the rotational coupling can be ignored. This model has been tested with large core ions such as Ar8+(2p6), Arx+(2p53s 'P) and with ground state (C", N5+, 0", Next) and metastable ls2s 'S (C4+, N5+) helium-like ions on various targets, below 0.5 au collision velocity.

Non-self-sustained electric discharge in oxygen gas mixtures: singlet delta oxygen production

“…Moreover, the addition of CO or H 2 into the gas mixture CO : Ar enabled us to enhance the maximum electric field strength (E/p) max in the EBSD and, accordingly, to significantly increase the value of the SIE Q m (figures 5 and 6). It should be pointed out that the same effect was observed in [22][23][24], where an addition of CO to nitrous oxide N 2 O resulted in considerable enhancement of the SIE in the EBSD and the development of an efficient N 2 O laser. In both cases, the major function of carbon monoxide is the decrease of the negative ions O − in a discharge due to the reaction…”

Planar cw N2O laser with RF excitation

“…In [6] in an electroionization N 2 O laser (EIL), a decrease in the energy input to the discharge is associated with a decrease in the electron density due to the process of dissociative electron attachment: N 2 O + e → N 2 + O − . A decrease in the concentration of free electrons in the discharge, in turn, leads to a decrease in the specific energy input and lasing energy.…”

“…In a pulsed electroionization N 2 O laser, the values of the radiation energy, specific energy output and efficiency were obtained −8 J; 16 J/(l × atm) and 7%, respectively [6], and in a pulsed laser excited by a self-sustained volume discharge initiated by an electron beam, the above parameters were obtained as 465 J; 15.1 J/(l × atm) and 5.3% [7]. * Author to whom any correspondence should be addressed.…”

“…Generation on vibrational-rotational transitions (λ gen = 10.3-11.1 µm) of the nitrous oxide N 2 O molecule was first obtained in lasers excited by a gas discharge and was studied in detail in [1][2][3][4][5][6][7][8]. The values of the output power of radiation and the efficiency of low-pressure continuous wave (cw) N 2 O lasers with a flow of a working mixture of gases at velocities of 3-5 m s −1 and excited by longitudinal direct current (DC) discharges, both in a traditional tube 2 m long at a pressure of 5-10 Torr, and in a waveguide laser 28 cm long at a pressure of 25-60 Torr, were obtained equal to 10 W and 3% [2], and 1.5 W and 2.2% [4], respectively.…”

Electron-beam controlled discharge lasers and laser amplifiers on CO 2 , CO, and N 2 O molecular gases

“…We have constructed a powerful and efficient EBCD N20 laser13 with energy and efficiency essentially exceeding the known values for electric-discharge N20 lasers. Liquefied components of the laser mixture (CO:N2;CO:N2:Ar) were injected in a gas flow in the form of finely-divided particles before an active volume, and cooled down the gas to necessary temperatures.…”