Linearly graded GeSi beam-expanding/compressing X-ray monochromator
| Authors | |
|---|---|
| Year of publication | 2010 |
| Type | Article in Periodical |
| Magazine / Source | Journal of Applied Crystallography |
| MU Faculty or unit | |
| Citation | |
| Web | http://journals.iucr.org/j/issues/2010/01/00/aj5143/aj5143bdy.html |
| Field | Solid matter physics and magnetism |
| Keywords | X-ray diffraction; X-ray optics; Monochromators |
| Description | In standard single-crystal V-channel germanium (220) X-ray beam-expanding/compressing monochromators for Cu K[alpha]1 radiation, a total beam expansion/compression of 5 and 10 corresponding to the asymmetry angles of 9deg and 12deg is achieved, respectively. Higher one-dimensional beam expansion/compression is achievable using larger angles of asymmetry at the expense of a decrease in the total intensity. To increase the intensity, a linearly graded Ge-rich GexSi1-x single crystal was used to prepare a monochromator with 15deg asymmetry angles (total expansion/compression factor of 21) for Cu K[alpha]1 radiation. The X-ray diffraction measurements show more than three times higher peak intensity at the output compared with that of a pure Ge monochromator. |
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