Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990aipc..211..229z&link_type=abstract
IN: High-energy astrophysics in the 21st century; Proceedings of the Workshop, Taos, NM, Dec. 11-14, 1989 (A91-47977 20-90). New
Astronomy and Astrophysics
Astrophysics
Gamma Ray Spectrometers, Imaging Spectrometers, Alkali Halides, Radiation Detectors
Scientific paper
The development is outlined of the Fiber-Fed Imaging Spectrometer (FIFIS), a low-cost-per-unit area imaging low-energy (0.1-10 MeV) gamma-ray spectrometer with excellent position resolution (about 2 mm at 511 keV), near unity quantum efficiency, and an energy resolution typical of alkali halide-type detectors. The design implications of the present imaging technique are described. The basic concept behind FIFIS and its extension to high-energy gamma rays are verified using the single-electron resolution of an EMI tube to measure the number of photoelectrons generated by light from the fiber optic. The fact that FIFIS yields a low-cost-per-unit area and has less weight and power requirements in an imaging system through a significant reduction in the electronics needed makes it an ideal candidate for future large-area telescopes.
Hailey Charles J.
Ziock Klaus-Peter
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