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![[Figure 2]](ve5086fig2mag.jpg)
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Figure 2
Calculated crystal Darwin curve as a function of angular offset from the Bragg angle for (a) 21 keV X-rays from Si(111) crystal planes and 63 keV X-rays from Si(333) crystal planes; (b) 21 keV X-rays from Si(220) crystal planes and 63 keV X-rays from Si(660) crystal planes. The red dashed lines in (a) and (b) show the center of the Darwin curves for 21 keV X-rays with Si(111) and Si(220) crystal planes, respectively. The blue dashed lines in (a) and (b) show the center of the Darwin curves for 63 keV X-rays with Si(333) and Si(660) crystal planes, respectively. Panel (c) demonstrates that, while maximizing the transmission of the fundamental radiation exiting from the Si(111) monochromator, the incident angle of the harmonic radiation (n = 3) situates at the tail (Δθh from the center) of the Si(660) crystal Darwin curve, which leads to the highly effective harmonic-rejection scheme reported in this paper. |
![[Figure 2]](ve5086fig2.jpg)
 | JOURNAL OF SYNCHROTRON RADIATION |
ISSN: 1600-5775
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