PORTABLE SURVEY METER FOR MEASUREMENT OF X-RAY HAZARDS ASSOCIATED WITH RADAR (X-RAY HAZARD METER).
Progress rept. no. 4,
NAVAL APPLIED SCIENCE LAB BROOKLYN N Y
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Investigations of various techniques d methods for measurement of pulsed x-radiation from ra dar established the scintillation technique to be the most feasible. Research on various scintilla tion phosphors resulted in the development of a unique dual-phosphor scintillation detector. Utilizing an RCA 6199 PM tube and the dual phos phor wafers of Pilot B and lucite loaded with silver-activated zinc sulphide energy independ ence for effective energies of 20 Kev to 1.3 Mev is achieved to within or - 15. Four ranges 5, 50, 500 and 5000 mrhr are provided to meas ure pulsed X-ray doses from radars. For a radar 1 microsec pulse width, 200 pps repetition rate the instrument can measure peak X-ray dose rates of 25, 250, 2500 and 25,000 rhr without satura tion. The instrument is insensitive to micro wave radiation in the X band region up to 50 milliwattssq cm and to magnetic fields up to one gauss at 30 Kcs. The probe is provided with arc-over protection. A prototype model, under development by the Material Laboratory, is described. Author