Conserving the Coherence and Uniformity of Third-Generation Synchrotron Radiation Beams: the Case of ID19, a `Long' Beamline at the ESRF

1998 ◽  
Vol 5 (5) ◽  
pp. 1243-1249 ◽  
Author(s):  
José I. Espeso ◽  
Peter Cloetens ◽  
José Baruchel ◽  
Jürgen Härtwig ◽  
Trevor Mairs ◽  
...  
Keyword(s):  
Synchrotron Radiation ◽  
Phase Contrast ◽  
Angular Size ◽  
Third Generation ◽  
Optical Elements ◽  
X Ray ◽  
Front End ◽  
Ray Path ◽  
Radiation Beams

The lateral coherence length is of the order of 100 µm at the `long' (145 m) ID19 beamline of the ESRF, which is mainly devoted to imaging. Most of the optical elements located along the X-ray path can thus act as `phase objects', and lead to spurious contrast and/or to coherence degradation, which shows up as an enhanced effective angular size of the source. Both the spurious contrast and the coherence degradation are detrimental for the images (diffraction topographs, tomographs, phase-contrast images) produced at this beamline. The problems identified and the way they were solved during the commissioning of ID19 are reported. More particularly, the role of the protection foils located in the front end, the beryllium windows, the filters and the monochromator defects (scratches, dust, small vibrations) is discussed.

SYNCHROTRON RADIATION SCANNING PHOTOEMISSION MICROSCOPY: INSTRUMENTATION AND APPLICATION IN SURFACE SCIENCE

1999 ◽  
Vol 06 (02) ◽  
pp. 265-286 ◽  
Author(s):  
M. KISKINOVA ◽  
M. MARSI ◽  
E. DI FABRIZIO ◽  
M. GENTILI
Keyword(s):  
Synchrotron Radiation ◽  
Surface Science ◽  
Photoelectron Spectroscopy ◽  
Applied Research ◽  
Third Generation ◽  
Microscopic Technique ◽  
Optical Elements ◽  
X Ray ◽  
High Lateral Resolution ◽  
Imaging And Spectroscopy

X-ray photoelectron spectroscopy has become a true microscopic technique at third generation soft X-ray synchrotron sources, finding applications in many domains of academic and applied research. This paper describes the present status of scanning photoemission microscopy, where by using photon optics the photon beam can be focused to micron or submicron dimensions and imaging or spectroscopy can be performed. It discusses different photon focusing optical elements and describes the major components of the constructed scanning microscopes. The applications of imaging and spectroscopy with high lateral resolution in surface science are illustrated, and some recent results obtained in different laboratories are briefly reviewed.

SPring-8 Program

1998 ◽  
Vol 5 (3) ◽  
pp. 162-167 ◽  
Author(s):  
H. Kamitsubo
Keyword(s):  
Electron Beam ◽  
Synchrotron Radiation ◽  
Storage Ring ◽  
Radiation Source ◽  
Third Generation ◽  
X Ray ◽  
Front End ◽  
Maximum Current ◽  
Booster Synchrotron ◽  
Under Construction

SPring-8 is a third-generation synchrotron radiation source operating in the soft and hard X-ray region. It consists of an injector linac of 1 GeV, a booster synchrotron of 8 GeV and a storage ring with a natural emittance of 5.9 nm rad. The storage ring can accommodate 61 beamlines in total, and 26 of them are under construction. The project has been carried out jointly by JAERI and RIKEN and construction of the facility started in 1991. Commissioning of the injector linac was started in August 1996 and an 8 GeV electron beam was injected into the storage ring in March 1997. The first synchrotron radiation from a bending magnet was observed at the front end of the beamline on 25 March and radiation from an undulator was observed on 23 April. On-beam testing of seven beamlines, four of them from in-vacuum undulators and three from bending magnets, started in July. The maximum stored current is currently fixed at 20 mA and the lifetime at maximum current is longer than 20 h. The dedication is scheduled for October 1997.

scholarly journals The high-resolution diffraction beamline P08 at PETRA III

2011 ◽  
Vol 19 (1) ◽  
pp. 30-38 ◽  
Author(s):  
O. H. Seeck ◽  
C. Deiter ◽  
K. Pflaum ◽  
F. Bertam ◽  
A. Beerlink ◽  
...  
Keyword(s):  
High Resolution ◽  
Synchrotron Radiation ◽  
Resolving Power ◽  
Third Generation ◽  
Solid Samples ◽  
High Quality ◽  
Optical Elements ◽  
X Ray ◽  
X Ray Scattering ◽  
Very High

The new third-generation synchrotron radiation source PETRA III located at the Deutsches Elektronen-Synchrotron DESY in Hamburg, Germany, has been operational since the second half of 2009. PETRA III is designed to deliver hard X-ray beams with very high brilliance. As one of the first beamlines of PETRA III the high-resolution diffraction beamline P08 is fully operational. P08 is specialized in X-ray scattering and diffraction experiments on solids and liquids where extreme high resolution in reciprocal space is required. The resolving power results in the high-quality PETRA III beam and unique optical elements such as a large-offset monochromator and beryllium lens changers. A high-precision six-circle diffractometer for solid samples and a specially designed liquid diffractometer are installed in the experimental hutch. Regular users have been accepted since summer 2010.

scholarly journals Synchrotron Radiation-based X-ray phase-contrast imaging of the aortic walls in acute aortic dissection

2020 ◽  
Vol 1 ◽  
pp. 81-91
Author(s):  
Koki Yokawa ◽  
Masato Hoshino ◽  
Naoto Yagi ◽  
Yutaka Nakashima ◽  
Kazunori Nakagawa ◽  
...  
Keyword(s):  
Synchrotron Radiation ◽  
Aortic Dissection ◽  
Phase Contrast ◽  
Acute Aortic Dissection ◽  
Phase Contrast Imaging ◽  
Contrast Imaging ◽  
X Ray
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