caa a22 4500 445830220 CHVBK 20180317145312.0 cr unu---uuuuu 170323e20110801xx s 000 0 eng 10.1007/s10686-011-9226-5 doi (NATIONALLICENCE)springer-10.1007/s10686-011-9226-5 Self-standing bent silicon crystals for very high efficiency Laue lens [Elektronische Daten] [Valerio Bellucci, Riccardo Camattari, Vincenzo Guidi, Ilaria Neri, Nicolas Barrière] Silicon mono-crystals have been bent thanks to a series of parallel superficial indentations on one of the largest faces of the crystals. This technique relies on irreversible compression of the crystal beneath and beside the indentations. This latter causes deformation with no need for external device, resulting in a uniform self-standing curvature within the crystal. Indented Si crystals have been characterized at European Synchrotron Radiation Facility using a monochromatic beam ranging from 150 to 700 keV. Crystals exhibited very high diffraction efficiency over a broad range of energy, peaking 95% at 150 keV. Measured angular spread of the diffracted beam was always very close to the morphological curvature of the sample under investigation, proving that the energy passband of bent crystals can be controlled by simply imparting a selected curvature to the sample. The method of superficial indentations was found to offer high reproducibility and easy control of diffraction properties of the crystals. Moreover the method is cheap and simple, being based on mass production tools. A Laue lens made of crystals bent by superficial indentations can provide high-efficiency concentration of hard x-ray photons, leading significant improvement in many astrophysical applications. Springer Science+Business Media B.V., 2011 Laue lens nationallicence Hard x-ray diffraction nationallicence Bent crystals nationallicence Bellucci Valerio Department of Physics, University of Ferrara, Via Saragat 1/c, 44122, Ferrara, Italy aut Camattari Riccardo Department of Physics, University of Ferrara, Via Saragat 1/c, 44122, Ferrara, Italy aut Guidi Vincenzo Department of Physics, University of Ferrara, Via Saragat 1/c, 44122, Ferrara, Italy aut Neri Ilaria Department of Physics, University of Ferrara, Via Saragat 1/c, 44122, Ferrara, Italy aut Barrière Nicolas Space Sciences Laboratory, 7 Gauss Way, University of California, 94720-7450, Berkeley, CA, USA aut Experimental Astronomy Springer Netherlands 31/1(2011-08-01), 45-58 0922-6435 31:1<45 2011 31 10686 https://doi.org/10.1007/s10686-011-9226-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10686-011-9226-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Bellucci Valerio Department of Physics, University of Ferrara, Via Saragat 1/c, 44122, Ferrara, Italy aut NATIONALLICENCE 700 1- Camattari Riccardo Department of Physics, University of Ferrara, Via Saragat 1/c, 44122, Ferrara, Italy aut NATIONALLICENCE 700 1- Guidi Vincenzo Department of Physics, University of Ferrara, Via Saragat 1/c, 44122, Ferrara, Italy aut NATIONALLICENCE 700 1- Neri Ilaria Department of Physics, University of Ferrara, Via Saragat 1/c, 44122, Ferrara, Italy aut NATIONALLICENCE 700 1- Barrière Nicolas Space Sciences Laboratory, 7 Gauss Way, University of California, 94720-7450, Berkeley, CA, USA aut NATIONALLICENCE 773 0- Experimental Astronomy Springer Netherlands 31/1(2011-08-01), 45-58 0922-6435 31:1<45 2011 31 10686 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer