Patent ID: 8481919
Filing Date: 2013-07-09
Classification: H01J,H05G

Abstract:
1. Apparatus for the controllable downhole production of ionizing radiation which exceeds 200 keV with a predominant portion of the spectral distribution within the Compton range, wherein at least a thermionic emitter is arranged in a first end portion of an electrically insulated vacuum container, and a lepton target is arranged in a second end portion of the electrically insulated vacuum container, wherein the thermionic emitter is connected to a series of serially connected negative electrical-potential-increasing elements, and each of said electrical-potential-increasing elements being arranged to increase an applied direct-current potential by transforming an applied, driving voltage, and to transmit the increased, negative direct-current potential and also the driving voltage to the next unit in the series of serially connected elements.