共查询到20条相似文献,搜索用时 15 毫秒
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A. N. Artemiev A. A. Snigirev V. N. Korchuganov A. G. Valentinov V. V. Kvardakov N. A. Artemiev A. V. Zabelin V. A. Rezvov A. G. Maevskii O. V. Naida A. A. Dyatlov 《Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques》2007,1(5):528-532
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. 相似文献
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Ashanin I. A. Bashmakov Yu. A. Budkin V. A. Valentinov A. G. Gusarova M. A. Danilova D. K. Dementev A. A. Dmitriyeva V. V. Dudina N. S. Dyubkov V. S. Kliuchevskaia Yu. D. Korchuganov V. N. Lalayan M. V. Lozeev Yu. Yu. Lozeeva T. A. Makhoro A. A. Mekhanikova V. Yu. Mosolova O. A. Polozov S. M. Pronikov A. I. Rashchikov V. I. Savchenko A. A. Samoshin A. V. Smygacheva A. S. Ushakov V. A. Feshchenko A. M. Fomin E. A. Shatokhin V. L. Biasci J.-C. Liuzzo S. Raimondi P. Revol J.-L. Farvaque L. White S. 《Physics of Atomic Nuclei》2018,81(11):1646-1651
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... 相似文献
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A. N. Artemiev A. D. Belyaev N. A. Artemiev A. A. Demkiv A. G. Maevsky O. Yu. Gorobtsov B. F. Kirillov S. I. Tyutyunnikov V. N. Shalyapin 《Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques》2013,7(5):916-920
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. 相似文献
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David W. Lynch Ward Plummer Franz Himpsel Tai C. Chiang Giorgio Margaritondo Gerry Lapeyre 《Synchrotron Radiation News》2015,28(4):20-23
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, 2]. 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. 相似文献
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Light Source for Synchrotron Radiation X-Ray Topography Study at Beijing Syncrotron Radiation Laboratory (BSRL)
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ZHAO Ji-Yong YANG Ping JIANG Jian-Hua TIAN Yu-Lian HAN Yong WANG Chun-Xi SHI Cai-Tu XIAN Ding-Chang 《中国物理C(英文版)》1992,16(8):679-684
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. 相似文献
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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. 相似文献
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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... 相似文献
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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... 相似文献
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《Physics letters. A》1998,244(6):523-526
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. 相似文献
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《Optics Communications》1986,58(3):172-176
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. 相似文献
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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。 相似文献
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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. 相似文献
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Satoshi Seino Takuya Kinoshita Takashi Nakagawa Takao Kojima Ryoichi Taniguci Shuichi Okuda Takao A. Yamamoto 《Journal of nanoparticle research》2008,10(6):1071-1076
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. 相似文献
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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. 相似文献
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Sheldon Wiebe Tomasz W. Wysokinski George Belev Denise Miller Adam Webb Ning Zhu 《Synchrotron Radiation News》2015,28(5):16-23
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 [1–3]. 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. 相似文献
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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. 相似文献