SPring-8 Program

1998 ◽  
Vol 5 (3) ◽  
pp. 162-167 ◽  
Author(s):  
H. Kamitsubo

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.

1998 ◽  
Vol 5 (5) ◽  
pp. 1243-1249 ◽  
Author(s):  
José I. Espeso ◽  
Peter Cloetens ◽  
José Baruchel ◽  
Jürgen Härtwig ◽  
Trevor Mairs ◽  
...  

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.


2021 ◽  
pp. 99-105
Author(s):  
Antonina Smygacheva ◽  
Vladimir Korchuganov ◽  
Evgenii Fomin

The Project of complete modernization of a current accelerator complex and the making of the 3-d generation light source is in progress in the NRC «Kurchatov Institute». A new booster synchrotron is part of the injection complex for a new synchrotron light source. It must ensure reliable and stable operation of the upgraded main storage ring. The paper presents the lattice of a new booster synchrotron and its main parameters.


2009 ◽  
Vol 4 (1) ◽  
pp. 43-46
Author(s):  
Alexey Bondarenko ◽  
Nikolay Vinokurov ◽  
Sergey Miginky

A beam extraction scheme from a cyclic accelerator is put forward. Its main difference from other schemes of extraction is the use of magnetic shields instead of a septum-magnet. Magnetic shields are located in the central dipole magnets of a pulsed chicane. The proposed scheme will be used for vertical extraction from a booster synchrotron to a storage ring in a new synchrotron radiation source in Novosibirsk.


Author(s):  
A. N. Artemiev ◽  
A. A. Snigirev ◽  
V. N. Korchuganov ◽  
A. G. Valentinov ◽  
V. V. Kvardakov ◽  
...  

2014 ◽  
Vol 21 (5) ◽  
pp. 996-1005 ◽  
Author(s):  
Christian G. Schroer ◽  
Gerald Falkenberg

X-ray scanning microscopy relies on intensive nanobeams generated by imaging a highly brilliant synchrotron radiation source onto the sample with a nanofocusing X-ray optic. Here, using a Gaussian model for the central cone of an undulator source, the nanobeam generated by refractive X-ray lenses is modeled in terms of size, flux and coherence. The beam properties are expressed in terms of the emittances of the storage ring and the lateral sizes of the electron beam. Optimal source parameters are calculated to obtain efficient and diffraction-limited nanofocusing. With decreasing emittance, the usable fraction of the beam for diffraction-limited nanofocusing experiments can be increased by more than two orders of magnitude compared with modern storage ring sources. For a diffraction-limited storage ring, nearly the whole beam can be focused, making these sources highly attractive for X-ray scanning microscopy.


1998 ◽  
Vol 553 ◽  
Author(s):  
C. Janot ◽  
L. Loreto ◽  
R. Farinato ◽  
L. Mancini ◽  
J. Baruchel ◽  
...  

AbstractSingle grains of real quasicrystals have been investigated using X-ray imaging techniques at a third-generation synchrotron radiation source (ESRF). Facetted microholes have been observed. The experimental results are discussed with reference to a description of the quasicrystal structure in terms of overlapping atomic clusters (self-similar packing or random covering modifications). Relations between holes and quasicrystal formation are also discussed.


1998 ◽  
Vol 5 (1) ◽  
pp. 17-22 ◽  
Author(s):  
A. Cedola ◽  
S. Lagomarsino ◽  
S. Di Fonzo ◽  
W. Jark ◽  
C. Riekel ◽  
...  

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