Production of Ar metastables in a dielectric barrier discharge

Pavel A. Mikheyev; Jiande Han; Amanda Clark; Carl Sanderson; Michael C. Heaven

doi:10.1117/12.2256172

13 January 2017 Production of Ar metastables in a dielectric barrier discharge

Pavel A. Mikheyev, Jiande Han, Amanda Clark, Carl Sanderson, Michael C. Heaven

Proceedings Volume 10254, XXI International Symposium on High Power Laser Systems and Applications 2016; 102540X (2017) https://doi.org/10.1117/12.2256172
Event: XXI International Symposium on High Power Laser Systems and Applications, 2016, Gmunden, Austria

Abstract

The results of experiments with a dielectric barrier discharge (DBD) are presented, where the production of metastable argon atoms was studied. The recently proposed optically pumped all-rare-gas laser (OPRGL) utilizes metastable atoms of heavier rare gases as lasing species. The required number density of metastables for efficient laser operation is 10¹²÷10¹³ cm^-3 in an atmospheric pressure of He buffer gas. Recent experiments had shown that such densities are easily produced in a nanosecond pulsed discharge, even at pressures larger than atmospheric, but problems appear when one is trying to produce them in a CW regime. The reason for difficulties in the CW production of metastables at an atmospheric pressure seems to be the low value of the E/N parameter (<5-6 Td). In our experiments a 20 KHz DBD in 2-5% Ar mixture with He at an atmospheric pressure was studied. [Ar(1s₅)] number density of the order of 10¹²cm^-3 was readily achieved. Temporal behavior of [Ar(1s₅)] throughout the DBD cycle was obtained. The results demonstrate the feasibility of DBDs for OPRGL development.

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Pavel A. Mikheyev, Jiande Han, Amanda Clark, Carl Sanderson, and Michael C. Heaven "Production of Ar metastables in a dielectric barrier discharge", Proc. SPIE 10254, XXI International Symposium on High Power Laser Systems and Applications 2016, 102540X (13 January 2017); https://doi.org/10.1117/12.2256172

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