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Abstract

This paper presents a multistage electrical configuration for excitation within a nanosecond transversely excited atmospheric nitrogen (TEA-N2) laser, with variations including a one-stage Blumlein circuit (1SBC),a three-stage Blumlein circuit (3SBC), and a five-stage Blumlein circuit (5SBC). The circuit features several discharge loops controlled by spark gaps and is intended to produce great performance through a low-inductance discharge geometry. A two-electrode spark gap is temporarily changed to cause the laser channel to collapse at the maximum overvoltage. The design enables gas discharge and nitrogen molecule excitation at lower voltages, with each configuration producing a varied peak output power depending on the number of stages used. The greatest energy outputs for 1SBC, 3SBC, and 5SBC were 1.02 mJ, 19.01 mJ, and 20.4 mJ, respectively, at 25 kV. The pulse duration was approximately 5.6 nsec, 4.6 nsec, and 3.2 nsec for each system. Peak output powers of 182 kW, 4133 kW, and 6375 kW respectively, were achieved with electrode separations of 3.5 mm and flow rates of 6 L/min, with rise times of 3.8, 2.4, and 1.6 ns. The electric-to-optical energy conversion efficiencies were ≈ 0.05%, 0.80%, and 0.58 %, respectively. The circuit inductances measured 0.123 nH, 0.070 nH, and 0.023 nH. This study present experimentally investigating (1SBC, 3SBC, 5SBC) configurations and correlating their discharge characteristics with the laser output energy, efficiency, pulse duration, and rise time.

DOI

10.53293/2788-6867.1182

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