Results 1 - 10 of 695
Results 1 - 10 of 695. Search took: 0.027 seconds
|Sort by: date | relevance|
[en] Highly visible on the approach to Grenoble from Lyon, the 280,000 square-metre European Synchrotron Radiation Facility site is fast becoming a prominent local landmark. Based on a series of studies (dating from 1977) and on the detailed preparative work of the ESRF team, the first set of buildings is approaching completion on-site. Elsewhere throughout Europe the manufacture of machine components is reaching the final stages
[en] Microbeams are now used routinely for X-ray diffraction experiments and a range of complex sample environments have been developed. Nanobeams, meanwhile, are only just starting to promote new experimental possibilities. This article discusses instrumentation and sample environments as well as selected applications of micro- and nano-diffraction at the ID13 beamline of the ESRF, with particular emphasis on polymer science.
[en] A new materials characterization system developed at the XMaS beamline, located at the European Synchrotron Radiation Facility in France, is presented. We show that this new capability allows to measure the atomic structural evolution (crystallography) of piezoelectric materials whilst simultaneously measuring the overall strain characteristics and electrical response to dynamically (ac) applied external stimuli
[en] Complete text of publication follows. In the frame of the ENSAR (FP7) project, we are constructing a Compact Positron- Electron spectrometer (COPE) using toroidal magnetic field. It will be used for studying the internal pair creation process in nuclear transitions. It will look like a miniaturized model of the ATLAS spectrometer at CERN at a scale of 1:100. The mean design parameters are high efficiency, good energy resolution and precise angle reconstruction. By our plans the size of this spectrometer would be limited to a diameter of about 30 cm and length about 20 cm, having 1 % energy- and 2deg angular resolutions. The solid angle of the planned spectrometer will be 2π. It is necessary to develop a geometry in which the inhomogeneity of the field can be easily handled. Prior to the construction it was necessary to perform computer simulations in order to avoid rough construction mistakes. The better approach of the reality with simulations is very important. The problem what we have to solve is very complicated. We need to simulate the magnetic field and trajectory of the particle moving in that field. We started our simulations using the PerMag software package. >From the result we learned the followings: 1) It has no meaning to cover the magnets with iron coat because it complicates the magnetic field. 2) It is not a good idea to form the magnetic one-segment from a big magnet and 12 smaller magnets. The fringing field of the small magnets significantly modifies the magnetic field distribution around the segment. On the other hand the construction of one segment from pieces is very difficult in reality. 3) The best shape for a segment which can easily be constructed is simple box. The PerMag package could simulate the magnetic field only in 2D, but we wanted to do more precise simulation in 3D. The free package developed by the European Synchrotron Radiation Facility (ESRF) was used for the simulation of the magnetic field applying the finite element method (FEM). The resulted field was implemented into the Geant3 package. In order to test the simulation of a charged particle trajectory using this field in Geant3, first we checked the shape of the expected trajectories with a simple and reliable Euler simulation method. Based on the results of the simulations we are planning to arrange six 100x150x15 (mm) NbFeB N48 (1.42T) bars around a thin carbon fibre beam pipe having a radius of 35 mm as shown in Fig. 4. Acknowledgements. The work has been supported by the ENSAR FP7 project (project number: 262010) and the Hungarian OTKA Foundation No. K72566.
[en] The development of the new field of nuclear inelastic scattering is reviewed. The experimental technique and the variety of applications are illustrated by recent results obtained at the Nuclear Resonance beamline of the European Synchrotron Radiation Facility
[en] Full text: Nuclear resonance techniques available at the four dedicated synchrotron radiation facilities in the world (APS, ESRF, PETRA III, SPring-8) have opened new avenues for the research in many fields. We will highlight some recent achievements, scientific and technical, which not only witness the new opportunities but also underline the maturity of the various techniques for the investigation of electric, magnetic, and dynamic properties of matter . Examples from the field of materials science will comprise areas such as superconductivity, functional materials, minerals, spintronics. After more than twenty years of successful beamline operation it is timely to think about new challenges. We are going to discuss future possibilities and visions, which may become reality with upgraded synchrotron radiation sources. However, those visions will only materialize if the user communities will play an active part in those upgrades. (authors)
[en] An upgraded version of the sample changer 'CATS' (Cryogenic Automated Transfer System) that was developed on the FIP-BM30A beamline at the ESRF is presented. At present, CATS is installed at SLS (three systems), BESSY (one system), DLS (two systems) and APS (four systems for the LSCAT beamline). It consists mainly of an automated Dewar with an assortment of specific grippers designed to obtain a fast and reliable mounting/dismounting rate without jeopardizing the flexibility of the system. The upgraded system has the ability to manage any sample standard stored in any kind of puck. (authors)
[en] The provisional Steering Committee of the European Synchrotron Radiation Facility (ESRF), on which France, the Federal Republic of Germany, Italy, Spain and the United Kingdom are represented, has begun work on preconstruction studies for an X-ray source. Senior staff were appointed in February
[en] The note summarizes 4 events picked up by the Editorial Board of the '' Synchrotron Radiation in Natural Science '' on: (1) New type of intense light source reported; (2) New infrared beamlines announced; (3) Upgrade for the European Synchrotron Radiation Facility; (4) Agreement on Collaboration between the Polish Synchrotron Radiation Society, PSRS, and the Centre for Synchrotron Radiation Ltd. Also 2 forthcoming conferences are announced