Abstract

Being able to produce pulses of neutrons differentiates sealed tube neutron generators from isotopic sources and they've become absolutely essential for a number of measurements. We briefly review pulsed neutron measurements in oil well logging, mineral exploration, and process control, emphasizing the neutron burst timing requirements. We then discuss the neutron burst timing properties of two types of neutron generators. One, currently the standard version, has a cold cathode Penning ion source, and the other, recently introduced into commercial service, uses a thermionic ion source.

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