Abstract: The present disclosure provides an electron generation apparatus includes: a discharge pin module having a support plate and a plurality of discharge pins coupled to the support plate; a discharge plate module disposed to be spaced apart from the plurality of discharge pins; a discharge plate slidably coupled inside the discharge plate module; a support structure having a coupling plate to which the discharge pin module and the discharge plate module are detachably coupled; and a circuit module having a main board located at a side opposite to the discharge pin module with the coupling plate being interposed therebetween and a plurality of distributed processing boards connected to the main board to apply a high-voltage, high-frequency pulse power to the plurality of discharge pins individually.