Point-Focusing Monochromator Crystal from Ge Wafer
Author Information
Author(s): Hiroshi Okuda, Kazuo Nakajima, Kozo Fujiwara, Kohei Morishita, Shojiro Ochiai
Primary Institution: Kyoto University
Hypothesis
Can hot plastic deformation of Ge single-crystal wafers be used to prepare point-focusing monochromator crystals without severe deterioration of crystal quality?
Conclusion
A point-focusing monochromator crystal was successfully prepared using hot plastic deformation of a Ge wafer, demonstrating effective focusing of X-rays.
Supporting Evidence
- The crystal surface must be hemispherical to satisfy the diffraction conditions.
- The study demonstrated that large plastic deformation can be achieved without significant loss of crystal quality.
- The focusing experiment showed that the X-ray beam was effectively focused onto a small spot.
Takeaway
Scientists made a special crystal that can focus X-rays really well by heating and shaping a piece of Germanium, which helps in getting clearer images.
Methodology
Ge(111) wafers were hot-pressed and deformed at high temperatures to create a point-focusing monochromator crystal.
Limitations
The process may not be cost-efficient due to the need for pre-polishing the crystal surface.
Digital Object Identifier (DOI)
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