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Journal of Physical Studies 4(3), 291–297 (2000)
DOI: https://doi.org/10.30970/jps.04.291 CORONA DISCHARGE IN WORKING MEDIA OF LASERS ON A FLUORIDE RARE GASES AND MOLECULE AND ATOM FLORINESA. K. Shuaibov, L. L. Shimon, A. I. Minya
Uzhgorod State University, |
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The results of an investigation of positive and negative corona discharge characteristics in the ‟needles-grid" electrode system, typical of excimer lasers working media on the $B-X$ fluorine transition of the rare gases, F($3s-3p$) lines and the electrodischarge laser on F$_2$($D'-A'$) are presented. We investigated the oscillograms of the corona discharge current, the dependences of the repetition rate of the current pulses on the voltage at the needles, and the current-voltage characteristics of the discharge in the rare gas mixtures with F$_2$ molecules (He/F$_2$, He/$R$/F$_2$, where $R$ – Ar, Xe, Kr). An investigation of the emission spectra of the generation zones of the corona discharge and the dependences of the emission lines of fluorine atoms, the heavy rare gases and their monofluorides ($R$F) on the corona discharge current was performed. The given corona discharge is uniformly distributed over the length of the active media of electro-discharge lasers with the pumping transverse discharge, therefore, it is of great interest in using it in electric circulation modules and UV preionisation systems of high-pressure lasers. It is shown that a positive corona discharge in He/$R$/F$_2$ mixtures is optimal for using in the electrical circulation modules and that a negative corona discharge is a source of UV emission. In a negative corona discharge in the He/F$_2$ mixtures the generation zones is a selective source of red emission on the transition F($3s-3p$) and the use of a negative corona discharge for electric circulation modules is at the optimum.
PACS number(s): 52.80.-s, 52.20.Jm