Gold mirrors for X-ray astronomy
نویسندگان
چکیده
منابع مشابه
Phase Fresnel Lens Development for X-ray & Gamma-ray Astronomy
Observations in the hard X-ray and gammaray energy regimes are constrained by limited sensitivity and angular resolution. Significant gains could be made if these high-energy photons could be concentrated from a large area onto a small detector element and if diffraction-limited measurements could be obtained. Furthermore, the angular resolution in the gamma-ray band would be superior to that p...
متن کاملFresnel lenses for X-ray and Gamma-ray Astronomy
Phase Fresnel lenses have the same imaging properties as zone plates, but with the possibility of concentrating all of the incident power into the primary focus, increasing the maximum theoretical efficiency from 11% to close to 100%. For X-rays, and in particular for gamma-rays, large, diffraction-limited phase Fresnel lenses can be made relatively easily. The focal length is very long for exa...
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We have fabricated a bifocal miniature torodial mirror that horizontally and vertically focuses to two different locations to provide a smaller footprint of beam for grazing-incidence wide-angle scattering (GIWAXS), while at the same time focusing the beam in the horizontal direction on the detector to further enhance the angular resolution. At CHESS we traditionally use glass single-bounce mon...
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We showed the design of a Wolter type I mirror which was optimized to have a maximum effective solid angle used in X-ray microscopes, and fabricated the mirror using the replication method. Several mirrors were successfully fabricated using only one master mandrel by our replication method without destroying the master mandrel. The replicated Au focusing and imaging mirrors showed surface rough...
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Transmission X-ray mirrors have been fabricated from 300-400 nm-thick low-stress silicon nitride windows of size 0.6 mm x 85 mm. The windows act as a high-pass energy filter at grazing incidence in an X-ray beam for the beam transmitted through the window. The energy cut-off can be selected by adjusting the incidence angle of the transmission mirror, because the energy cut-off is a function of ...
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ژورنال
عنوان ژورنال: Gold Bulletin
سال: 1977
ISSN: 2364-821X,2190-7579
DOI: 10.1007/bf03216518