Dr
W. E. Gabella
(Department of Physics and Astronomy, Vanderbilt University)
26/09/2012, 09:00
X-ray Channeling & X-ray Optics
We have plans to use very low-emittance electron beams to generate channeling x-rays capable of being used for phase-contrast imaging and electron diffraction imaging. We have developed field-emission cathodes made of small needles of diamond with end radii of 10 nm. We have measured emission of 10 µA per tip at modest accelerating fields, and we have fabricated them as single emitters and as...
Dr
Yasushi Hayakawa
(Laboratory for Electron Beam Research and Application (LEBRA), Nihon University)
26/09/2012, 09:30
X-ray Channeling & X-ray Optics
Computed tomography (CT) for light materials such as bio-sample
were carried out using parametric -X-ray radiation (PXR) and a
flat panel detector (FPD).
Tomography images were actually reconstructed from the projection images
which obtained for the measurement time of 5 min to 1 hour.
Dr
Mikhail Mazuritskiy
(Southern Federal University)
26/09/2012, 09:50
X-ray Channeling & X-ray Optics
In this work soft X-ray synchrotron radiation transmitted through microchannel plates was investigated. Primary monochromatic beam penetrates into microchannels of a hexagonally regular polycapillary structure ~ 0.4 mm thick, with channels of 10 µm hole diameter and 12 µm pitch. Fine structure of reflection and XANES spectra at the Si L-edge at the exit of SiO2 MCP has been analysed. The...
Dr
Vahan Kocharyan
(Institute of Applied Problems of Physics NAS RA,)
26/09/2012, 10:30
X-ray Channeling & X-ray Optics
In this work the effect of thermal neutrons focusing in a quartz single crystal under the influence of acoustic fields in Laue diffraction geometry has been theoretically discussed. It is shown, that by the variation of operating parameters of spatial acoustic fields induced in a quartz single crystal, it is possible to monochromatize the neutron beam, tenfold increase its intensity, focus and...
