Hyper-filter-fluorescer spectrometer for x-rays above 120 keV

Details Hyper-filter-fluorescer spectrometer for x-rays above 120 keV Hyper-filter-fluorescer spectrometer for x-rays above 120 keV

1981-07-07

1983-07-12

Church, Craig E.

X-ray or gamma ray systems or devices

Beam control

Filter

378 44, 378145, 378157, G01N 2322

Patent

active

043935125

ABSTRACT:
An apparatus utilizing filter-fluorescer combinations is provided to measure short bursts of high fluence x-rays above 120 keV energy, where there are no practical absorption edges available for conventional filter-fluorescer techniques. The absorption edge of the prefilter is chosen to be less than that of the fluorescer, i.e., E.sub.PRF <E.sub.F, contrary to the prior art technique E.sub.PRF >E.sub.F. In this way, the response function is virtually zero between E.sub.PRF and E.sub.F and well defined and enhanced in an energy band of less than 1000 keV above the 120 keV energy.

REFERENCES:
patent: 3176130 (1965-03-01), Brinkerhoff
patent: 3456108 (1969-07-01), Pichoir
patent: 3581087 (1971-05-01), Brinkerhoff
patent: 3854049 (1974-12-01), Mistretta
patent: 3919548 (1975-11-01), Porter
patent: 3920999 (1975-11-01), Drexler
patent: 3944822 (1976-03-01), Dzubay
patent: 4189645 (1980-02-01), Chaney
"Filtered Detector Arrays for Single Pulse Photon Measurements Above 100 keV", Tirsell, Livermore Laboratories, UCRL 80314, 11/09/77.
"Filter Fluorescer Experiment on the Argus Laser", Kornblum, Livermore Laboratories, UCRL 81471, 10/10/78.
"A Ten Channel Filter-Fluorescer Spectrometer", Pruett, Livermore Laboratories, UCRL 81477, 10/31/78.

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