Title :
Dynamic behavior of ultra stable oscillators under irradiation at low dose rate
Author :
Bourrieau, J. ; Brunet, M. ; Dutrey, John F. ; Laporte, B.
Author_Institution :
Office Nat. d´´Etudes et Recherches Aerospatiales, Centre d´´Etudes et Recherches de Toulouse, France
Abstract :
The radiation induced shifts of frequency observed under fragmented and continuous exposures at low dose rate (Low Earth´s Orbit-LEO-and Geostationary Earth´s Orbit-GEO-simulations) on Ultra Stable Oscillators equipped with electrodeless (BVA) and self sustained (QAS) crystals, with swept and unswept quartz are presented. The drifts appear as the sum of two components; the first saturating and annealing rapidly, the second, seen during continuous exposure, probably varies during the few months after the end of the irradiation
Keywords :
crystal resonators; frequency stability; quartz; radiation effects; Geostationary Earth´s Orbit; Low Earth´s Orbit; continuous exposure; electrodeless crystals; low dose rate; quartz resonators; radiation induced frequency shifts; self sustained crystals; swept quartz; ultra stable oscillators; unswept quartz; Annealing; Belts; Electron traps; Frequency; Low earth orbit satellites; Magnetic flux; Magnetic shielding; Magnetosphere; Oscillators; Protons;
Conference_Titel :
Radiation and its Effects on Components and Systems, 1993.,RADECS 93., Second European Conference on
Conference_Location :
St. Malo
Print_ISBN :
0-7803-1793-9
DOI :
10.1109/RADECS.1993.316546
