New intense neutron generator and high-resolution detector for well logging applications

摘要

Advances in both ion source and gamma-ray detector technology at LBNL are being used to develop a new high-sensitivity neutron logging instrument. Up to 37 mA of current per 10-20 (mu)s pulse, 80-95% D(sup +), has been produced by a 2 inch diameter pulsed multicusp ion source. A D-T neutron flux of 10(sup 9)-10(sup 10) n/s is projected from this data. CdZnTe is being developed as a possible gamma-ray detector because of its potential for good energy resolution and efficiency, and ability to operate at room temperature. 3-D time-dependent Monte Carlo calculations show the utility of this system for locating contaminants, especially chlorine-containing solvents, at remediation sites.