The design and performance of a soft X-ray double crystal monochromator beamline at Aladdin

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.

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A low-cost and flexible double-crystal monochromator for an x-ray beamline

Review of Scientific Instruments ◽

10.1063/1.1148755 ◽

1998 ◽

Vol 69 (3) ◽

pp. 1230-1235 ◽

Cited By ~ 3

Author(s):

C. S. Hwang ◽

F. Y. Lin ◽

Chih-Hao Lee ◽

Kuan-Li Yu ◽

C. H. Hsieh ◽

...

Keyword(s):

Low Cost ◽

Double Crystal ◽

X Ray ◽

Double Crystal Monochromator

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A double crystal monochromator with self-compensation mechanism for ELETTRA XRD2 beamline

Diamond Light Source Proceedings ◽

10.1017/s2044820110000377 ◽

2010 ◽

Vol 1 (MEDSI-6) ◽

Author(s):

A. Gambitta

Keyword(s):

Vertical Displacement ◽

Compensation Mechanism ◽

Input Beam ◽

Output Beam ◽

Double Crystal ◽

X Ray ◽

New Device ◽

Double Crystal Monochromator ◽

Fixed Distance

A prototype of a new double crystal monochromator (DCM) has been designed and developed for the second crystallography beamline (XRD2) at ELETTRA. The new device has to cover the 8–35 keV X-ray range. Since the corresponding diffraction angles are quite small, the choice has been to design a DCM with a fixed distance between the two crystals. As a consequence, the output beam has a small vertical displacement during the scan. This movement is compensated by means of an upstream mask, vertically moving and cutting the input beam at different heights. The movement of the mask is driven by a mechanism linked to the primary rotation of crystals (self-compensation), without any additional motor and following the displacement law required for compensation. The principle, the mechanism and the general mechanical concept of the device will be described in this paper.

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HAXPES beamline PES-BL14 at the Indus-2 synchrotron radiation source

Journal of Synchrotron Radiation ◽

10.1107/s1600577518008408 ◽

2018 ◽

Vol 25 (5) ◽

pp. 1541-1547 ◽

Cited By ~ 15

Author(s):

Jagannath ◽

U. K. Goutam ◽

R. K. Sharma ◽

J. Singh ◽

K. Dutta ◽

...

Keyword(s):

Thin Film ◽

High Resolution ◽

Electron Spectroscopy ◽

High Energy ◽

Solid Samples ◽

Double Crystal ◽

X Ray ◽

Double Crystal Monochromator ◽

Ccd Detector ◽

Scientific Results

The Hard X-ray Photo-Electron Spectroscopy (HAXPES) beamline (PES-BL14), installed at the 1.5 T bending-magnet port at the Indian synchrotron (Indus-2), is now available to users. The beamline can be used for X-ray photo-emission electron spectroscopy measurements on solid samples. The PES beamline has an excitation energy range from 3 keV to 15 keV for increased bulk sensitivity. An in-house-developed double-crystal monochromator [Si (111)] and a platinum-coated X-ray mirror are used for the beam monochromatization and manipulation, respectively. This beamline is equipped with a high-energy (up to 15 keV) high-resolution (meV) hemispherical analyzer with a microchannel plate and CCD detector system with SpecsLab Prodigy and CasaXPS software. Additional user facilities include a thin-film laboratory for sample preparation and a workstation for on-site data processing. In this article, the design details of the beamline, other facilities and some recent scientific results are described.

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

Journal of Synchrotron Radiation ◽

10.1107/s1600577517006312 ◽

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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Design and performance of the double crystal monochromator beamline at the Canadian Light Source

Review of Scientific Instruments ◽

10.1063/1.1445821 ◽

2002 ◽

Vol 73 (3) ◽

pp. 1602-1604 ◽

Cited By ~ 3

Author(s):

B. W. Yates ◽

E. L. Hallin

Keyword(s):

Light Source ◽

Double Crystal ◽

Double Crystal Monochromator ◽

And Performance

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Position of exit X-rays from rotated-inclined double-crystal monochromators

Journal of Synchrotron Radiation ◽

10.1107/s0909049597015355 ◽

1998 ◽

Vol 5 (3) ◽

pp. 679-681 ◽

Cited By ~ 2

Author(s):

Yasuharu Kashihara ◽

Hiroshi Yamazaki ◽

Kenji Tamasaku ◽

Tetsuya Ishikawa

Keyword(s):

Heat Load ◽

Diffraction Theory ◽

Third Generation ◽

X Rays ◽

Double Crystal ◽

Undulator Radiation ◽

X Ray ◽

Double Crystal Monochromator ◽

Asymmetric Reflection ◽

Wide Range

The rotated-inclined double-crystal monochromator (RIDCM) has been adopted to reduce the heat load from third-generation undulator radiation. The position of the exit X-rays from RIDCM has been calculated as a function of X-ray energy on the basis of diffraction theory including refraction effects. The results show that the positions of the exit X-rays vary over a wide range due to asymmetric reflection. Methods of fixing the exit position in RIDCM are also discussed.

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