Performance of the Daresbury synchrotron radiation source soft x‐ray double‐crystal monochromator

1992 ◽  
Vol 63 (1) ◽  
pp. 1322-1325 ◽  
Author(s):  
M. D. Roper ◽  
P. A. Buksh ◽  
I. W. Kirkman ◽  
G. van der Laan ◽  
H. A. Padmore ◽  
...  
Keyword(s):  
Synchrotron Radiation ◽  
Radiation Source ◽  
Synchrotron Radiation Source ◽  
Double Crystal ◽  
X Ray ◽  
Double Crystal Monochromator

An accurate theory of X-ray coplanar multiple SRMS diffractometry

2018 ◽  
Vol 74 (6) ◽  
pp. 673-680 ◽  
Author(s):  
V. G. Kohn
Keyword(s):  
Synchrotron Radiation ◽  
Plane Wave ◽  
Experimental Setup ◽  
Incident Plane Wave ◽  
Instrumental Function ◽  
Multiple Diffraction ◽  
Double Crystal ◽  
X Ray ◽  
Double Crystal Monochromator ◽  
Incident Plane

The article reports an accurate theory of X-ray coplanar multiple diffraction for an experimental setup that consists of a generic synchrotron radiation (SR) source, double-crystal monochromator (M) and slit (S). It is called for brevity the theory of X-ray coplanar multiple SRMS diffractometry. The theory takes into account the properties of synchrotron radiation as well as the features of diffraction of radiation in the monochromator crystals and the slit. It is shown that the angular and energy dependence (AED) of the sample reflectivity registered by a detector has the form of a convolution of the AED in the case of the monochromatic plane wave with the instrumental function which describes the angular and energy spectrum of radiation incident on the sample crystal. It is shown that such a scheme allows one to measure the rocking curves close to the case of the monochromatic incident plane wave, but only using the high-order reflections by monochromator crystals. The case of four-beam (220)(331)({\overline {11}}1) diffraction in Si is considered in detail.

A method to stabilize the incident X-ray energy for anomalous diffraction measurements

2017 ◽  
Vol 24 (4) ◽  
pp. 781-786
Author(s):  
Wenjia Wang ◽  
Xiaoyun Yang ◽  
Guangcai Chang ◽  
Pengfei An ◽  
Kewen Cha ◽  
...  
Keyword(s):  
Synchrotron Radiation ◽  
Data Collection ◽  
Absorption Edge ◽  
Feedback Loop ◽  
Inflection Point ◽  
Single Crystal Diffraction ◽  
Double Crystal ◽  
Anomalous Diffraction ◽  
X Ray ◽  
Double Crystal Monochromator

A method to calibrate and stabilize the incident X-ray energy for anomalous diffraction data collection is provided and has been successfully used at the single-crystal diffraction beamline 1W2B at the Beijing Synchrotron Radiation Facilities. Employing a feedback loop to control the movement of the double-crystal monochromator, this new method enables the incident X-ray energy to be kept within a 0.2 eV range at the inflection point of the absorption edge.

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