In standard single-crystal V-channel germanium (220) X-ray beam-expanding/ compressing monochromators for Cu Kë radiation, a total beam expansion/ compression of 5 and 10 corresponding to the asymmetry angles of 9 and 12° 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 15° asymmetry angles (total expansion/compression factor of 21) for Cu Kë 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.
Linearly graded GeSi beam expanding/compressing x-ray monochromator
Ferrari C;
2010
Abstract
In standard single-crystal V-channel germanium (220) X-ray beam-expanding/ compressing monochromators for Cu Kë radiation, a total beam expansion/ compression of 5 and 10 corresponding to the asymmetry angles of 9 and 12° 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 15° asymmetry angles (total expansion/compression factor of 21) for Cu Kë 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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
