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2020 Projects

High voltage pulse generators for an atmospheric pressure plasma jet​

Logan Henning ’22
Major: Computational Physics

Logan Henning ’22

Major: Computational Physics

Research Collaborators: Džafer Čamdžić; Shalese Lovell; Anni Zettl

Faculty Collaborator: Adam Light, Physics

We present two circuit designs for supplying pulsed high-voltage to an atmospheric pressure plasma jet. Hard to break down contaminants, including per-fluoroalkyl substances (PFAS) can be destroyed effectively by atmospheric pressure plasma.  For this application, producing energetic electrons is a primary goal. Short duration pulses, on the order of several nanoseconds, allow for a strongly non-equilibrium plasma, which in turn yields a higher efficiency energy transfer to electrons. Parameter goals include sub-nanosecond rise times, 10 kV peak voltage, and kHz repetition rates. In an effort to create a low-cost, high-repetition-rate pulse generator, we worked to combine Linear Transformer Driver (LTD) design with diode-based pulse compression.  LTD setups allow for a modular design, making current and voltage easily customizable, while pulse compression gives the desired rise times and pulse duration.

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