Topic
Synchrotron radiation
About: Synchrotron radiation is a research topic. Over the lifetime, 14639 publications have been published within this topic receiving 244775 citations. The topic is also known as: magnetobremsstrahlung radiation & Synchrotron Radiation.
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TL;DR: Property of this radiation have potential applications in the detection of charged particles and accelerator beams and for the characterization of metamaterial macroscopic parameters (epsilon, mu).
Abstract: We analyze the radiation from a charged particle crossing the boundary between an ordinary medium and a ``left-handed'' metamaterial. We obtain exact and approximate expressions for the field components and develop algorithms for their computation. The spatial radiation in this system can be separated into three distinct components, corresponding to ordinary transition radiation having a relatively large magnitude, Cherenkov radiation, and reversed Cherenkov-transition radiation (RCTR). The last one is explained by reflection and refraction of reversed Cherenkov radiation at the interface. Conditions for generating of RCTR are obtained. We note properties of this radiation that have potential applications in the detection of charged particles and accelerator beams and for the characterization of metamaterial macroscopic parameters ($\ensuremath{\epsilon}$, $\ensuremath{\mu}$).
61 citations
TL;DR: Using the dynamical theory of Bragg diffraction, it is shown that there is a direct relationship between the phase of the x-ray standing-wave field and the phase-factor phases, which are determined from the phases of the modulations in these secondary yields.
Abstract: Using the dynamical theory of Bragg diffraction, we show that there is a direct relationship between the phase of the x-ray standing-wave field and the phase of the structure factor. For an experimental demonstration, we monitor the Ga and As K fluorescence and resonant Raman scattering yields, while scanning through the (111) and (200) Bragg diffraction rocking curves of GaAs perfect single crystals. The phases of the (111) and (200) GaAs structure factors are determined from the phases of the modulations in these secondary yields. With the use of monochromatized synchrotron radiation, with a variable photon energy between 10 and 15 keV, the effect of anomalous dispersion on the structure-factor phases is clearly seen in the vicinity of the Ga and As K absorption edges. We use this feature, in conjunction with the measured absorption spectrum, for directly determining the dispersion parameters f' and f'' for atoms which appear in single-crystal structures.
61 citations
TL;DR: In this article, the time-resolved studies of luminescence for scintillators based on oxides, alkaline earth fluorides, and alkaline halides excited by x-ray synchrotron radiation with flux density Nhy=6×(1014-1016) photon's−1/cm−2 are reported.
Abstract: The time‐resolved studies of luminescence for scintillators based on oxides, alkaline‐earth fluorides, and alkaline halides excited by x‐ray synchrotron radiation with flux density Nhy=6×(1014–1016) photon s−1 cm−2 are reported. The changes of spectral and time luminescence properties of above‐mentioned materials were observed. Two various models for understanding the observed effects are suggested. Presented peculiarities must be taken into account by scintillation detector users dealing with high intensity synchrotron radiation.
61 citations
20 May 1990-Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment
TL;DR: In this article, the development of a number of soft X-ray spectromicroscopes at synchrotron radiation facilities throughout the world is reviewed, which make use of several different technical approaches to achieve lateral resolution.
Abstract: We review the development of a number of soft-X-ray spectromicroscopes at synchrotron radiation facilities throughout the world. These instruments make use of several different technical approaches to achieve lateral resolution. Each approach has advantages and limitations, which makes the different instruments largely complementary to each other. These exciting new devices make full use of the high brightness of present synchrotron radiation sources and fully justify the current development of new ultrabright sources.
61 citations
TL;DR: In this paper, phase contrast imaging (PCI) was used to examine dynamic material response at ns to μs timescales with 3 μm spatial resolution using a single 60 ps synchrotron X-ray bunch.
Abstract: Understanding the dynamic response of materials at extreme conditions requires diagnostics that can provide real-time, in situ, spatially resolved measurements on the nanosecond timescale. The development of methods such as phase contrast imaging (PCI) typically used at synchrotron sources offer unique opportunities to examine dynamic material response. In this work, we report ultrafast, high-resolution, dynamic PCI measurements of shock compressed materials with 3 μm spatial resolution using a single 60 ps synchrotron X-ray bunch. These results firmly establish the use of PCI to examine dynamic phenomena at ns to μs timescales.
61 citations