DEVELOPMENT OF A SEMIRAD DETECTION SYSTEM FOR HIGH-INTENSITY NEUTRON RADIATION.
Abstract
The design, fabrication and testing of a detection system to measure pulses of high intensity neutron radiation is discussed. The system includes a neutron detecting component operating on the SEMIRAD principle and a 'stretcher' amplifier component capable of accepting the output pulse from the detector, shaping and amplifying the pulse so that the time-integral of the pulse waveform is proportional to the neutron dose. The system was made to operate over the temperature range of -28C to +65C by modification of the detector design to permit constant vac-ion pumping even during burst time. This was considered necessary because of the hydrogenous liner outgassing as a result of elevated operating temperatures as well as the high intensity neutron pulses. The design goal of a unity gamma to neutron response ratio was achieved for fission spectrum neutrons. The amplifier itself generates a noise signal which is proportional to the incident burst yield and should be operated remotely from the detector (20 to 40 ft. cable lengths) and shielded if possible. Sufficient radiation hardness was demonstrated in the selection of amplifier components from exposure of one 'stretcher' amplifier to a total dose of 26,600 rads with no detectable change in operability. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 27, 1967
- Accession Number
- AD0658741
Entities
People
- F. C. Riggin
- H. J. Cooley