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Compact plasma switch and nano technology research involves the study of pseudospark switches, specifically the cathode-physics of the pseudospark switches, for single-shot or repetitive pulsed power applications. We investigate the use of novel materials (low-work-function and high electron yield materials) and advanced materials such as nano-carbon-tubes for use in the trigger mechanism and or cathode material [1]. Furthermore, understanding the fundamental mechanisms and processes underlying the discharge initiation, transition to hollow cathode phase, then to super emissive phase are important. We have developed a high-power plasma switch that uses carbon-nano-tubes (CNT) as the trigger to activate the switch [2]. CNTs are fabricated in house and field emission characteristics under different operating conditions are measured. The results are used to design trigger electrodes (cold electron emitting cathode) for use in plasma switches [3, 4]. Application of this research is in the field of compact repetitive pulsed power systems where high power and current densities are needed to switch a circuit to generate a pulsed electric field. For this research, optical diagnostics methods such as emission spectroscopy are employed. CNTs are also being considered as cathode material for atmospheric pressure microplasmas. Dr. Kirkici’s group collaborates with other faculty in the college of Engineering by fabricating CNTs either vertically- aligned, patterned into specific shapes, or deposited on metallic substrates.
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