caa a22 4500 469077085 CHVBK 20180323132938.0 cr unu---uuuuu 170328e19920901xx s 000 0 eng 10.1007/BF02507862 doi (NATIONALLICENCE)springer-10.1007/BF02507862 Development status of Bragg hard—X-ray concentrators for space astronomy [Elektronische Daten] [G. Pasqualini, P. De Chiara, F. Frontera] Summary: In this paper we report the development status of a research programme devoted to study the possibility of utilizing the Bragg diffraction technique to concentrate hard X-rays. We present the results of our theoretical studies. We discuss the expected performances of a hard—X-ray (>10 keV) concentrator which will be made of nested paraboloidal mirrors of graphite (002) mosaic crystals in a reflection configuration. We also report the differences in performance between a perfect mirror geometry and an imperfect geometry. We give a short description of the X-ray test facility which has been set up to perform reflectivity measurements of flat samples of mosaic crystals. We also discuss perspectives of this programme in the context of the space astrophysics. Società Italiana di Fisica, 1992 X-ray sources nationallicence Astronomical and space-research instrumentation nationallicence Pasqualini G. Dipartimento di Fisica, Università di Ferrara, Ferrara, Italia aut De Chiara P. Dipartimento di Fisica, Università di Ferrara, Ferrara, Italia aut Frontera F. Dipartimento di Fisica, Università di Ferrara, Ferrara, Italia aut Il Nuovo Cimento C Kluwer Academic Publishers 15/5(1992-09-01), 879-887 0390-5551 15:5<879 1992 15 11543 https://doi.org/10.1007/BF02507862 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02507862 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Pasqualini G. Dipartimento di Fisica, Università di Ferrara, Ferrara, Italia aut NATIONALLICENCE 700 1- De Chiara P. Dipartimento di Fisica, Università di Ferrara, Ferrara, Italia aut NATIONALLICENCE 700 1- Frontera F. Dipartimento di Fisica, Università di Ferrara, Ferrara, Italia aut NATIONALLICENCE 773 0- Il Nuovo Cimento C Kluwer Academic Publishers 15/5(1992-09-01), 879-887 0390-5551 15:5<879 1992 15 11543 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer