KrF laser controlled diffuse discharge opening/closing switches using a photoelimination reaction

Kobayashi, Osamu; Sasagawa, Teruo; Obara, Minoru
December 1987
Applied Physics Letters;12/21/1987, Vol. 51 Issue 25, p2103
Academic Journal
Optical control of a diffuse discharge can potentially be used to switch inductive energy storage systems at high repetition rates. A means of optical enhancement of the electron attachment process can hopefully be used as an optically controlled switch. Vinylchloride (C2H3Cl) photoeliminates a vibrationally rotationally excited HCl(v,J) which strongly attaches low-energy electrons. In our experiment, we observed the opening and closing of a diffuse discharge in a mixture of C2H3Cl/He (C2H3Cl:He=0.7:99.3%, total pressure 1.5 Torr) by KrF laser irradiation of 5.7 mJ/cm2 (20 ns full width at half-maximum). Under these conditions, a discharge current of 200 μA could be interrupted with a time constant of 100 μs. The discharge was again initiated by KrF laser irradiation. As a result, both discharge opening and closing by the laser irradiation were demonstrated.


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