Balance of CO molecules in the plasma of a sealed-off CO laser

Influence of nitrogen on thermodynamic properties and plasma composition in discharge tube of CO-laser

“…2). It is well known that the balance of CO concentrations in sealed-off discharge regimes should take into account three basic processes [1]:…”

“…The concentration of carbon atoms in the ground state was determined from absolute values of population of electronic excited states [1]. The method is based on knowledge of population of electrically excited states, which under experimental conditions applied here are excited mainly by direct collision from ground state and decay in radiation processes.…”

“…The vibrationally excited CO(X 1 Σ,v) molecules, involved in the laser-radiation generation, hardly relax during collisions with initial component of the active mixture, however the ratio of their relaxation could significantly increase when collision partners are some products of the above mentioned plasma-chemical processes [1]. It is well known (see e.g.…”

Formation and Excitation of CN Molecules in He–CO–N2–O2 Discharge Plasmas

“…Our apparatus and the experimental and analytical procedures used in the measurements have been described in detail elsewhere [27,28]. We used molybdenum glass discharge tubes of diameter 15 and 22 mm that were cooled by running water or liquid nitrogen-see scheme in Fig.…”

“…The mixture composition in the discharge tube was analyzed with a MSC-6 timeof-flight mass spectrometer (see [28] for details). In the He:CO:N 2 plasmas various species including CO 2 are produced due to plasma-chemical processes; the [CO 2 ] concentration reaches values of up to 0.5% of [CO] in nitrogen cooled systems and 10-15% of [CO] in water cooled ones.…”