SEALED NEUTRON TUBE Russian patent published in 2015 - IPC H05H3/06 

FIELD: electricity.

SUBSTANCE: in sealed neutron tube between body of ion source and anode there is a tubular insulator installed in parallel to the tube axis along the whole lengths except for ends; the insulator is covered with conducting layer coupled electrically to cathode and inside the tubular insulator there is wire conductor coupled to extraction electrode and output of bushing insulator.

EFFECT: increasing efficiency of ion source of the sealed neutron tube and increasing neutron flux.

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