Proton-recoil proportional-counter array for neutron-image construction

Conference · Sun Jan 01 04:00:00 EST 1984

OSTI ID:6611343

Fink, C L; Eichholz, J J; DeVolpi, A

The fuel-motion measurement capability of the fast-neutron hodoscope has been upgraded by the addition of a 360-detector proton-recoil proportional-counter array, which detects high-energy fission neutrons. The current sensitive amplifier/discriminator module for each detector fits into a 12.7 by 12.7 by 102 mm package and cost less than $100 per module. It has a 50 ns rise time, a noise level of 100 nA, and a deadtime per event of 200 ns. Provision has been provided for the independent adjustment of the input current versus discriminator voltage for each module. The new proportional-counters cost approximately $400 each. Each detector has been tested to have the same gain versus voltage response. A space-charge model relating count-rate changes to space-charge effects has also been developed. The new detector array has been operational for approximately two years and has become the main detector system in fuel-motion analysis. It has significantly improved the linearity, stability, count-rate capability, and setup ease of the hodoscope.

• Research Organization: Argonne National Lab., IL (USA)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 6611343
• Report Number(s): CONF-841007-1; ON: DE84011744
• Country of Publication: United States
• Language: English

Related Subjects

440101* -- Radiation Instrumentation-- General Detectors or Monitors & Radiometric Instruments
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
DEAD TIME
DETECTION
FUEL MOTION DETECTION
HODOSCOPES
MEASURING INSTRUMENTS
NEUTRON DETECTORS
PROPORTIONAL COUNTERS
PROTON RECOIL DETECTORS
RADIATION DETECTORS
TIMING PROPERTIES