Two-detector probe of a pulsed neutron generator

Technical Report · Tue May 01 04:00:00 EDT 1973

OSTI ID:4932582

Chrusciel, E; Dabek, T; Massalski, J; Morstin, K; Owsiak, T; Starzec, A

A borehole neutron generator probe of 90 mm diameter is described. This tool is provided for geophysical work, in which the neutron diffusion parameters of rock formations are determined. From these, much information about lithology and reservoir rock characteristics can be derived. The borehole neutron generator consists of the down-hole probe and the surface equipment. The accelerator-type neutron tube is the most important element of the probe. The 14 MeV neutrons from the D-T reaction are generated in the probe, in pulses of 100 mu s width and 400 Hz frequency. There are also two independent scintillation- type detectors in the probe, as well as the electronics, i.e., pulse. shaping, control and information transfer circuits. The probe is connected with the surface equipment by means of a triple channel logging cable. The surface equipment consists of the 220 V, 400 Hz supplier, the surface control circuit, the pulse-height analyzer, the multichannel time analyzer, and the photorecorder. The principles of pulsed neutron measurements with the probe are also presented, as well as the results of first model tests. (auth)

• Research Organization: Akademia Gorniczo-Hutnicza, Krakow (Poland). Instytut Techniki Jadrowej
• Sponsoring Organization: Sponsor not identified
• NSA Number: NSA-29-000482
• OSTI ID: 4932582
• Report Number(s): ITJ--42
• Country of Publication: Poland
• Language: Polish

Related Subjects

FAST NEUTRONS
N46200* --Instrumentation--Radiometric Instruments
N54600 - -Particle Accelerators--Experimental Facilities
NEUTRON SOURCES
PULSED NEUTRON TECHNIQUES
SOLID SCINTILLATION DETECTORS
WELL LOGGING