This paper discusses two new developments in methods for virtually reconstructing paintings that have been painted over from Xray synchrotron imaging data of their canvases. First, Xray synchrotron data often contains areas of information loss, in which signal from underlayers was unable to penetrate particularly thick or Xrayabsorbent surface features. We present a new method for automatically...

The small degree of circular polarisation observed in some synchrotron sources has a frequency dependence that is not consistent with simple predictions based on the intrinsic circular polarisation of synchrotron emission. The suggestion is explored that the circular polarisation arises as a propagation effect within the source. The physical basis of this alternative mechanism is the fact that ...

Bursts of coherent synchrotron radiation at far-infrared and millimeter wavelengths have been observed at several storage rings. A microbunching instability has been proposed as the source for the bursts. However, the microbunching mechanism has yet to be elucidated. We provide the first evidence that the bursts are due to a microbunching instability driven by the emission of synchrotron radiat...

The timing system of SPring-8 booster synchrotron generates various timing signals concerning beam injection, acceleration from 1 GeV to 8 GeV and ejection. We have improved the timing system of the synchrotron giving it better stability and flexibility. This improvement results the other merits of advanced operations, for example, storing electron beam in the synchrotron, changing the injectio...

This paper describes a set of in-situ mechanical loading / synchrotron x-ray diffraction experiments done on copper iron alloys at the Cornell High Energy Synchrotron Source. The goal of the experiments is to measure crystal lattice strains in the two phase materials under load in order to better understand how deformation is partitioned in two phase alloy systems. Synchrotron x-rays have disti...

This issue marks the 50th anniversary of the first observation of synchrotron radiation light from the General Electric 70 MeV synchrotron and coincides with the third anniversary of the Journal of Synchrotron Radiation (JSR). The issue brings together review articles from some of the pioneers of the field and in our view forms a unique historical record. The interdisciplinary nature of synchro...

The beam transverse emittance control and preservation in all the acceleration chain from the proton source to the 7TeV colliding beams is fundamental for ensuring high luminosity runs at the CERN Large Hadron Collider (LHC). This paper aims at discussing the emittance measurement methods and present status in the acceleration stages from the Proton Synchrotron Booster (PSB) injection at p=50Me...

We discuss the role of thermal cyclo–synchrotron emission in a magnetically dominated corona above an accretion disk in an active galaxy or a galactic black hole candidate. The dissipation occurs in localized active regions around the central black hole. Cyclo– synchrotron radiation is found to be an important process. In the case of galactic black hole candidates, its emission can dominate the...

We demonstrate an apparatus for measuring time-dependent x-ray diffraction. X-ray pulses from a synchrotron are diffracted by a pair of Si(111) crystals and detected with an x-ray streak camera that has single-shot resolution of better than 1 ps. The streak camera is driven by a photoconductive switch, which is triggered by 100-fs laser pulses at a repetition rate of 1 kHz. The laser and the st...