Title :
Small accelerators as neutron generators for the borehole environment
Author :
Smith, R.C. ; Bush, C.H. ; Reichardt, J.W.
Author_Institution :
Kaman Instrum. Corp., Colorado Springs, CO, USA
Abstract :
The application of small-diameter, electrically operated, pulsed neutron sources are examined. These include thermal neutron lifetime measurements, using pulse rates in the 1000 pulse/s range, and fast neutron inelastic scattering approaches, using pulse rates in the 20000 pulse/s range. For several years a neutron generator suitable for these applications has been available for integration into users´ systems. Based on the D-T fusion reaction, it produces neutrons at the 10/sup 8/ n/s level in a 1-11/16-in diameter package. It operates in environments up to 150 degrees C and up to 20000 psi. Experience with this system is described, and factors that limit the life of its sealed accelerator tube are discussed. Design improvements of this system for increased-environmental-temperature applications are also discussed.<>
Keywords :
geophysical equipment; neutron sources; 150 degC; 20000 psi; borehole; lifetime; neutron generators; pulsed neutron sources; sealed accelerator tube; small-diameter; thermal neutron lifetime measurements; Fusion power generation; Instruments; Neutrons; Nuclear power generation; Packaging; Petroleum; Probes; Pulse measurements; Scattering; Temperature sensors;
Journal_Title :
Nuclear Science, IEEE Transactions on
