... Conventional neutron generators for the well-logging industry are based on the cold and/or hot cathode designs ( Etridge 1985 and Frentrop 1970 ), where electron impact is the primary ionization mechanism for the production of D/T ions. A characteristic of electron impact ion sources...

... detector array is described for improved density response. upstream oil & gas equation gamma ray gamma detector rho petroleum engineer inelastic gamma source inelastic gamma neutron generator neutron detector limestone wilson spe 71742 atom density count rate porosity formation...

...-ray detectors arrayed above a new neutron generator that can be pulsed at different frequencies and modes for different types of measurements. The system employs short tool sections for ease in shipping and handling. In the pulsed neutron capture mode, the tool pulses at 1 kHz, and records a complete...