Determination of the electron beam size at the Kurchatov synchrotron radiation source using an X-ray refractive lens

The electron beam size in the storage ring of the Kurchatov synchrotron radiation source at 2.5 GeV is determined using an x-ray two-dimensional parabolic refractive lens. The vertical size of the electron beam of the storage ring is found to be 270 μm, which exceeds the corresponding design value 140 μm (at a betatron coupling of 1%). The difference is explained by the imperfect geodetic arrangement of ring elements and the incomplete adjustment of the ring.     

Conceptual Design of a Dedicated Fourth-Generation Specialized Synchrotron Radiation Source (SSRS-4) at the Kurchatov Institute

Physics of Atomic Nuclei - Work on the conceptual design of a dedicated fourth-generation fourth-generation Specialized Synchrotron Radiation Source (SSRS-4) is in progress at the Kurchatov...     

Debye-Scherrer diffraction in the backscattering geometry at the Kurchatov Synchrotron Radiation source. Part 1. Characterization of the method

A technique for Debye-Scherrer diffraction in the backscattering geometry is developed at the Kurchatov Synchrotron Radiation source. It is shown that the sensitivity of the method to a relative change in the lattice constant is higher by two orders of magnitude than that in the forward-scattering geometry. The requirements for experimental apparatus are discussed.     

Tantalus,the First Dedicated Synchrotron Radiation Source

Tantalus began as a 240 MeV electron storage ring that served as a testbed for the next-generation accelerator (which eventually would become Fermilab) [1 There are several more extensive papers on the history of Tantalus: David W. Lynch, “The Early Years of Tantalus,” Synch. Rad. News 5, 16 (1992); David W. Lynch, “Tantalus, a 240 MeV Dedicated Source of Synchrotron Radiation, 1968-1986,” J. Synchrotron Rad. 4, 334 (1997); Giorgio Margaritondo, “The Evolution of a Dedicated Synchrotron Light Source,” Physics Today, May (2008), 37.[Taylor &; Francis Online] , [Google Scholar], 2 List of acronyms: AEC–Atomic Energy Commission (evolved into today's Department of Energy); AFOSR–Air Force Office of Scientific Research; NSF–National Science Foundation; FFAG–fixed-field alternating gradient; UHV–ultrahigh vacuum; OSHA–Occupational Safety and Health Administration; EDC–energy distribution curve; CIS–constant initial state; CFS–constant final state; NAS–National Academy of Sciences. [Google Scholar]]. It was to be injected from the 40 MeV FFAG synchrotron that was already operating. Before its completion, funding from the AEC was discontinued. During the time it was in financial limbo, a report from an NAS study group suggested using Tantalus as a source of VUV synchrotron radiation for spectroscopy and possibly other techniques. The AFOSR eventually funded the completion and early use of Tantalus.     

合肥光源上采用干涉方法测量束流截面

束流截面尺寸测量对优化系统参数、确保光源运行至关重要。采用干涉法测量合肥同步辐射光源束流截面垂直方向的尺寸。基于Cittert-Zernike 定理,利用双缝干涉条纹的对比度得出相干度和束流截面尺寸。测量系统由干涉成像与图像处理系统组成。进行了5组试验,试验结果证明了干涉法测量合肥同步辐射束流截面尺寸的可行性。     

Light Source for Synchrotron Radiation X-Ray Topography Study at Beijing Syncrotron Radiation Laboratory (BSRL)

Characteristics of the synchrotron radiation source for X-ray topography study at Beijing Synchrotron Radiation Laboratory (BSRL) is desribed in this paper,local geometrical resolution of topographs is discussed,the diffracting intensities of white beam topography is given.     

Opportunities with Synchrotron Radiation at the Mesoscale

What is mesoscale science? The modifier “meso” can mean different things to different communities. In many areas of science, “mesoscale” generally refers to a middle-ground domain of length, energy, or time where theories accurate at both lower and higher scales fail. In materials science, for example, mesoscale behavior often rises when quantum behavior begins to fade, collective effects become important, or statistical variation and defects appear, often at length scales larger than a few nm. However, for atmospheric scientists and ecologists, mesoscale means miles. For meterologists, mesoscale means hundreds to thousands of miles. The mesoscale arena for cosmologists is many light-years across.     

Microwave Instability in the USSR Synchrotron Radiation Source under Design

Physics of Atomic Nuclei - Investigation of instabilities that emerge in the interaction of a charged-particle beam with elements of the chamber of state-of-the-art synchrotron radiation sources...     

A Project for a Compton Photon Source with an Energy up to 2500 MeV at the SKIF Synchrotron Radiation Facility

Physics of Atomic Nuclei - In this paper, we describe the project of a photon source with energies up to 2500 MeV at the SKIF synchrotron radiation facility (under construction in Novosibirsk). It...     

用北京同步辐射光源研究氟化物闪烁体的荧光时间衰减特性

介绍了利用北京同步辐射光源测量闪烁体荧光时间结构特性的新方法.并用此方法测量了纯BaF_{2、CeF3晶体和粉晶样品及掺La³⁺、Ce³⁺的BaF2晶体时间衰减谱.对BaF2掺稀土元素的测量结果表明,La³⁺和De³⁺的掺入对BaF2时间衰减慢成分均有一定的抑制作用,但从理论上分析两种掺杂对慢成分的抑制机制并不相同.}     

Radiation corrections to the electron inelastic scattering by an intense stationary laser beam

By solving the Dirac-Lorentz equation numerically with a perturbative predictor-corrector method, we find that the electron inelastic scattering by an intense stationary laser beam is heavily modified by the radiation reaction when the electron is injected upon the laser beam with a large crossing angle (θ>10°). This is the first time the Dirac-Lorentz equation is applied to study the interaction of an electron with a real laser beam in the Hermite-Gaussian mode.     

Measurement of fiber diameter using an edge diode beam of light

The possibility of utilizing an edge diode as a source of light in shadow technique for filament diameter measurement is presented. The diode light beam is scanned across a filament by means of an oscillating optical assembly. The displacement of the scanning assembly when the beam intercepts the filament and casts a shadow on a photodetector is a measure of the outside diameter of the filament. The metrological properties of the method are presented. The inaccuracy of the technique is smaller than ±0.6 μm, in an acceptable range of the fiber lateral displacement equal to about 1 mm.     

用同步辐射光源研究掺铈对闪烁体发光性质的影响

描述了北京同步辐射装置上，利用同步辐射作为激光光源，观测微量元素铈对闪烁体ＧＳＯ、ＰｂＦ２和ＢａＦ２发光性质的影响。     

Multilayer-based soft X-ray polarimeter at the Beijing Synchrotron Radiation Facility

A compact high precision eight-axis automatism and two-axis manual soft-ray polarimeter with a multilayer has been designed, constructed, and installed in 3W1B at the Beijing Synchrotron Radiation Facility (BSRF). Four operational modes in the same device, which are double-reflection, double-transmission, front-reflection-behind-transmission and front-transmission-behind-reflection, have been realized. It can be used for the polarization analysis of synchrotron radiation. It also can be used to characterize the polarization properties of the optical elements in the soft X-ray energy range. Some experiments with Mo/Si and Cr/C multilayers have been performed by using this polarimeter with good results obtained.     

Radiation induced synthesis of gold/iron-oxide composite nanoparticles using high-energy electron beam

Composite nanoparticles consisting of gold and iron oxide were synthesized in aqueous solution systems by using a high-energy electron beam. The electron irradiation induces radiation-chemical reaction to form metallic gold nanoparticles. These gold nanoparticles were firmly immobilized on the surface of the support iron oxide nanoparticles. Surface of the support iron oxide nanoparticles are almost fully coated with fine gold nanoparticles. The size of these gold nanoparticles depended on the concentrations of gold ions, polymers and iron oxide nanoparticles in the solutions before the irradiation.     

Towards automated data collection at the Stanford Synchrotron Radiation Laboratory

Held only weeks after the SRS had delivered its last photon beams (from September 11?12, 2008), the 2008 UK Synchrotron Radiation User Meeting was a mixture of nostalgia, news and next steps. Prof. Chris Hardacre, Chairman of the User Forum, welcomed everyone to the meeting and opened the session reserved for updates from the sources mostly used by the UK community. Dr. Tracy Turner began by showing a short video clip of the last seconds of multibunch user beam at the official SRS switch off ceremony on August 4. Highlighting several recent results to illustrate the point, she described how the SRS had been productive right up to the end with a late surge in operational reliability in both multibunch and single bunch modes. Over 400 papers have already been published this year, and many of these in high impact factor journals. She announced the imminent publication of the final Annual Report and a survey of the economic impact made by the SRS over its lifetime which had been prompted by the impending closure and which will be informative to government and other bodies in assessing the benefits that accrue from investment in large-scale facilities.     

Biomedical Imaging Using Synchrotron Radiation: Experience at the Biomedical Imaging and Therapy (BMIT) Facility at the Canadian Light Source

The Biomedical Imaging and Therapy (BMIT) beamlines at the Canadian Light Source (CLS) comprise a multi-modality synchrotron imaging facility capable of imaging objects with 2–200 μm resolution with beam sizes up to ~200 mm wide and ~10 mm high in the experimental hutches [1 T. W. Wysokinski, Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 775, 1–4 (2015).[Crossref], [Web of Science ®] , [Google Scholar]–3 T. W. Wysokinski, Nucl Instr Meth Phys Res A 582, 73–76 (2007).[Crossref], [Web of Science ®] , [Google Scholar]]. BMIT hosts two beamlines, a bend magnet 05B1-1 and an insertion device 05ID-2, with capabilities to apply absorption imaging, in-line phase contrast imaging (PCI), analyzer-based imaging (ABI) or diffraction-enhanced imaging (DEI), and K-Edge Subtraction (KES) imaging. Talbot or grating interferometry is under development.     

Biomolecular solution X-ray scattering at the National Synchrotron Light Source

In recent years there has been a growing interest in the application of X-ray scattering techniques to biomolecules in solution. At NSLS, a new undulator-based beamline, X9, has been constructed to address the oversubscribed user demand for X-ray scattering. Beamline X9 has the capability to perform small/wide-angle X-ray scattering (SAXS/WAXS) all in one single instrument. This is accomplished by utilizing a vacuum sample/detector chamber that is an integral part of the SAXS scattering flight path. This vacuum chamber allows a WAXS detector to be positioned at a close distance from the sample, while not interfering with scattered X-rays at small angles from reaching the SAXS detector. A regular training program, the X9 workbench, has also been established to allow users to become familiar with beamline X9 for solution X-ray scattering.