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Abstract: This paper proposes a novel way of generating high voltage for electric discharge plasma in controlling NO x emission in diesel engine exhaust. A solar powered high frequency electric discharge topology has been suggested that will improve the size and specific energy density required when compared to the traditional repetitive pulse or 50 Hz AC energization. This methodology has been designed, fabricated and experimentally verified by conducting studies on real diesel engine exhaust. [Copyright &y& Elsevier]