Title :
A compact neutron detector for the geology application
Author :
Biddle, R.S. ; Collinsworth, P.R.
Author_Institution :
Los Alamos Nat. Lab., NM, USA
Abstract :
A compact neutron detector has been designed and built for a geology experiment. The detector had to fit inside a 1.5-in-diameter borehole in a large block of concrete. A gas-filled, 1-in-diameter /sup 3/He tube was attached to a 1-in-diameter electronics preamplifier package. The electronics package consists of a cylindrically shaped, high-voltage section and a single-channel analyzer with a buffered output. The low-voltage components are mounted on a printed-circuit board. The circuit board and the high-voltage section are attached to a semicylindrical base. The outputs consist of a light-emitting diode for visual observations and a fixed-width, TTL (transistor transistor logic)-compatible pulse for a counter. This internal assembly is equipped with coaxial connectors and slips into a thin-walled tube that serves as the preamplifier housing. Power for the detector is supplied by an external, high-voltage supply and a 5-VDC supply.<>
Keywords :
geophysical equipment; neutron detection and measurement; nuclear electronics; proportional counters; /sup 3/He tube; 1 in; borehole; buffered output; coaxial connectors; compact neutron detector; electronics preamplifier package; geology application; high-voltage section; low-voltage components; proportional counter; single-channel analyzer; Concrete; Detectors; Electron tubes; Electronics packaging; Geology; Helium; Light emitting diodes; Neutrons; Preamplifiers; Printed circuits;
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference, 1991., Conference Record of the 1991 IEEE
Conference_Location :
Santa Fe, NM, USA
Print_ISBN :
0-7803-0513-2
DOI :
10.1109/NSSMIC.1991.258828
