Performance of the YB66 soft X-ray monochromator crystal at the wiggler beamline of the UVSOR facility

1998 ◽  
Vol 5 (3) ◽  
pp. 726-728 ◽  
Author(s):  
Toyohiko Kinoshita ◽  
Yasutaka Takata ◽  
Tokuo Matsukawa ◽  
Hirofumi Aritani ◽  
Shigehiro Matsuo ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Synchrotron Radiation ◽  
Energy Resolution ◽  
Energy Region ◽  
Heat Load ◽  
Photon Flux ◽  
Double Crystal ◽  
X Ray ◽  
Double Crystal Monochromator ◽  
Monochromator Crystal

Soft X-ray spectra have been measured using a pair of YB66(400) monochromator crystals at the double-crystal monochromator beamline BL7A of the UVSOR facility, where the wiggler radiation has a magnetic field of 4 T. Deformation of the YB66 crystal due to heat load from the synchrotron radiation is almost negligible. The photon flux is about 108 photons s−1 (100 mA)−1 in the energy region 1.2–2 keV and the energy resolution is 0.7 ± 0.1 eV around hν = 1.5 keV. These results show that the YB66 crystal is suitable for use as a monochromator crystal. Its application to soft X-ray spectroscopy is discussed.

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.

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

1998 ◽  
Vol 5 (3) ◽  
pp. 679-681 ◽  
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.

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

Kyushu University Beamline, BL06, at SAGA Light Source

2011 ◽  
Vol 1 (SRMS-7) ◽  
Author(s):  
S. Yoshioka ◽  
T. Ishioka ◽  
H. Okabe ◽  
A. Harata ◽  
Y. Sejima ◽  
...  
Keyword(s):  
Light Source ◽  
Focal Point ◽  
Fluorescence Yield ◽  
Photon Flux ◽  
Focal Distance ◽  
Double Crystal ◽  
X Ray ◽  
Xafs Spectroscopy ◽  
Ion Chamber ◽  
Double Crystal Monochromator

Kyushu University has installed the hard X-ray beamline, BL06, at bending magnet source of SAGA Light Source in Japan. It is designed for X-ray absorption fine structure (XAFS) spectroscopy and small-angle X-ray scattering (SAXS) experiments. The X-ray energy covered by the beamline ranges from 2.1 to 23 keV using a Si(111) flat double-crystal monochromator. Two bent cylindrical-type focusing mirrors are used, each with a different focal point. They are set in the optics section and can be used independently. One of the mirrors has a focal distance of 6 m, which corresponds to the sample stage for XAFS experiments, while the second mirror focuses at 10 m, corresponding to the detector for the SAXS experiments. The photon flux measured by the ion chamber at mirror focal point is 1010 phs/s. The experimental hutch houses the detection equipment for both XAFS and SAXS. For XAFS studies, a set of ion chambers for transmission mode and a Lytle detector and a Si drift detector for fluorescence yield mode are available. For SAXS studies, the camera pass length can be chosen from 0.5 to 2.5 m with 0.5 m increments in between, and an image plate is operated as signal detector. The beamline will be opened for user operation around summer 2010.

Micro X-Ray Fluorescence Analysis with Synchrotron Radiation

1988 ◽  
Vol 32 ◽  
pp. 141-147
Author(s):  
Shinjiro Hayakawa ◽  
Atsuo Iida ◽  
Sadao Aoki ◽  
Yohichi Gohshi
Keyword(s):  
Synchrotron Radiation ◽  
Fluorescence Analysis ◽  
X Rays ◽  
Beam Spot ◽  
Double Crystal ◽  
X Ray ◽  
Double Crystal Monochromator ◽  
Surface Irregularities ◽  
Sufficient Intensity ◽  
Beam Excitation

AbstractA synchrotron radiation X-ray micro analyzer(SRXMA) was developed at Photon Factory in Japan. The present SRXMA combines a double crystal monochromator and mirror optics and either a white or a monochromatic microbeam can be used. Micro X-ray fluorescence analysis was carried out, and a minimum detection limit of 1 ppm for Mn was obtained for 100 sec measurement with the white beam. With monochromatic beam excitation, micro X-ray spectroscopies are now feasible.The obtained beam size was 1.6 μ;m - 34 μm* The beam was blurred in one direction by the scattered X-rays caused by the surface irregularities of the focusing mirror. Improvements in the mirror quality will ensure a beam spot of just a few microns with sufficient intensity.

Rotated-inclined double-crystal monochromator for synchrotron radiation: aberration and its compensation

1998 ◽  
Vol 5 (3) ◽  
pp. 661-663
Author(s):  
Jaromír Hrdý ◽  
Edoardo Busetto
Keyword(s):  
Synchrotron Radiation ◽  
Power Density ◽  
High Power ◽  
Radiation Power ◽  
Radiation Power Density ◽  
Double Crystal ◽  
X Ray ◽  
Double Crystal Monochromator

A rotated-inclined double-crystal X-ray monochromator was designed for high-power undulator beamlines for SPring-8 to reduce the impinging radiation power density. Recently, it has been shown that an inclined double-crystal monochromator suffers from a certain type of geometrical aberration that may be relatively easily compensated. In this paper, it is shown that a similar aberration exists also in the case of rotated-inclined monochromators and that as in the inclined case the aberration may also be compensated.

A high-performance double-crystal monochromator soft X-ray beamline

1998 ◽  
Vol 5 (3) ◽  
pp. 664-666 ◽  
Author(s):  
Tang-Eh Dann ◽  
Shih-Chun Chung ◽  
Liang-Jen Huang ◽  
Jwei-Ming Juang ◽  
Ching-Iue Chen ◽  
...  
Keyword(s):  
Synchrotron Radiation ◽  
High Performance ◽  
Resolving Power ◽  
Research Projects ◽  
Photon Beams ◽  
Double Crystal ◽  
X Ray ◽  
Double Crystal Monochromator ◽  
Radiation Research ◽  
Super Alloy

A high-performance double-crystal-monochromator soft X-ray (DCMSX) beamline has been constructed at the Synchrotron Radiation Research Center (SRRC). This beamline delivers monochromatic photon beams with energies from 1 to 9 keV and a resolving power (E/ΔE) of up to 7000. This beamline provides users with an opportunity to study many important materials, such as high-Tc superconductors, magnetic materials, catalysts, super-alloy compounds etc. Excellent EXAFS and NEXFS spectra have been routinely obtained from this beamline. Several interesting research projects are currently being conducted at this beamline. All the results show that this beamline has been constructed to meet its design goals.

A graphite double-crystal monochromator for X-ray synchrotron radiation

1988 ◽  
Vol 21 (6) ◽  
pp. 911-915 ◽  
Author(s):  
D. Hohlwein ◽  
D. P. Siddons ◽  
J. B. Hastings
Keyword(s):  
Synchrotron Radiation ◽  
Double Crystal ◽  
X Ray ◽  
Double Crystal Monochromator

scholarly journals A middle energy-bandwidth X-ray monochromator for high-flux synchrotron diffraction: revisiting asymmetrically cut silicon crystals

2019 ◽  
Vol 26 (3) ◽  
pp. 750-755 ◽  
Author(s):  
Hiroo Tajiri ◽  
Hiroshi Yamazaki ◽  
Haruhiko Ohashi ◽  
Shunji Goto ◽  
Osami Sakata ◽  
...  
Keyword(s):  
Atomic Plane ◽  
Photon Flux ◽  
Wide Energy Range ◽  
Double Crystal ◽  
X Ray ◽  
Silicon Crystals ◽  
Double Crystal Monochromator ◽  
Diffraction Geometry ◽  
Wide Energy ◽  
Surface Diffraction

To supply the growing demand for high photon flux in synchrotron science including surface diffraction, a middle energy-bandwidth monochromator covering the 10−4 to 10−3 range has been adapted by applying an asymmetric diffraction geometry to a cryogenically cooled silicon 111 double-crystal monochromator used as a standard for the undulator source at SPring-8. The asymmetric geometry provides a great advantage with its ability to configure flux gains over a wide energy range by simply changing the asymmetry angle, while the angular divergence of the exit beam remains unchanged. A monolithic design with three faces has been employed, having one symmetrically cut and another two asymmetrically cut surfaces relative to the same atomic plane, maintaining cooling efficiency and the capability of quickly changing the reflection surface. With the asymmetric geometry, an X-ray flux greater than 1014 photons s−1 was available around 12 keV. A maximum gain of 2.5 was obtained relative to the standard symmetric condition.

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