Pulsed neutron generator tube design which extends the lifetime of a cathode

A method for operating a pulsed neutron generator including an ionizer with an electron emitting cathode and a grid wherein the cathode and grid are disposed in a sealed chamber. At least one of the following is applicable to the ionizer; a distance between the cathode and the grid, a cathode curren...

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Bibliographische Detailangaben
Hauptverfasser:	VILDE LOIC, PERKINS LUKE, REIJONEN JANI, CHIROVSKY LEO
Format:	Patent
Sprache:	eng
Schlagworte:	CONVERSION OF CHEMICAL ELEMENTS EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ELECTRICITY FIXED CONSTRUCTIONS INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MEASURING MINING NUCLEAR ENGINEERING NUCLEAR PHYSICS OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS PHYSICS PLASMA TECHNIQUE PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OFNEUTRONS PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMICBEAMS RADIOACTIVE SOURCES TESTING
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Beschreibung
Zusammenfassung:	A method for operating a pulsed neutron generator including an ionizer with an electron emitting cathode and a grid wherein the cathode and grid are disposed in a sealed chamber. At least one of the following is applicable to the ionizer; a distance between the cathode and the grid, a cathode current and/or a potential on the grid are selected such that the ionizer operates at most about one-half the space charge limited current for a grid current selected to provide a predetermined amount of neutron production.