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Browse Prior Art Database

In line Multiple beam X-ray Monochromator

IP.com Disclosure Number: IPCOM000097648D
Original Publication Date: 1961-Mar-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 22K

Publishing Venue

IBM

Related People

Cole, H: AUTHOR

Abstract

A multiple beam X-ray monochromator is constructed by shaping a perfect crystal such as Germanium or a combination of crystals A, B and C as shown in the drawing.

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In line Multiple beam X-ray Monochromator

A multiple beam X-ray monochromator is constructed by shaping a perfect crystal such as Germanium or a combination of crystals A, B and C as shown in the drawing.

When an X-ray beam shown as a solid line falls on crystal B, all wavelengths except those satisfying the Bragg law from the hkl planes are absorbed. Those satisfying the Bragg law are transmitted through the crystal by the Borrmann effect, emerging from crystal B as two beams of equal intensity, coherent, monochromatic, plane polarized light. These two beams are reflected again as shown by the solid lines by the A and C crystals to come together in space for any interference study.

The monochromator is positioned so that reflection takes place from one crystal A as illustrated for a dotted line light path so that parallel beams are generated. Slots and other crystal shapes as well as external reflecting and refracting devices may be employed for beam shaping and positioning.

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