Monochromator multi-layered

Since the middle of the 1990s, some authors [SCH 96, FUG 99, GRO 98a] have suggested creating parallel geometry devices in laboratories designed by using the same idea as diflractometeis installed on synchrotron sources. Naturally, the main problem in this case is the intensity of the incident beam. This is why, in most cases, the multi-reflection, front monochromator is replaced with a parabolic multi-layer... 

The divergence of a beam originating from a Bartels four-reflection monochromator is typically 12 arcseconds, or 2.7 thousandths of a degree. Note that, in the case of parabolic multi-layer monochromator, the divergence is 10 times that. 

The X-ray source is usually a conventional sealed tube, with or without a curved monochromator, or a parabolic multi-layer monochromator. The source-sample distance is relatively high in order for the incident beam, whose opening is limited by two shts (Fi and F2), to be considered parallel. An additional slit is placed directly above the sample, which is irradiated at a low incidence angle. This slit, F3, limits the angular opening seen at each moment by the detector, which is either a gas or a scintillation detector. It is also common to find analyzer shts placed on the path of the diffracted beams. By hmiting the divergence, these slits make it possible reduce the peak widths. 

Si-crystal 3) phase-shrfter 4) detector 5) ancillary equipment or 1) monochromator 2) polarizer 3) pi/2-flipper 4) multi-layer spin splitter 5) pi-flipper 6) analyzer 7) detector 8) ancillary equipment 200,000 equipment ... 

It is also relevant to the current problem of the creation of miniature spectral devices. Miniature monochromators have already been created, which are based on the application of the interferometric films. These films [100] differs from the others in that the thickness of the multi-layer dielectric system varies steadily across the filter so, that on one side of the filter the maximum of the transparency lies in the red range, and on the other side - in the violet range. But interferential-polarization filters have already been created, with high spectral resolution. These filters allow an exceedingly narrow region of spectral transparency, the... 

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