Relevant bibliographies by topics / Beam Instrument

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  1. Journal articles

Academic literature on the topic 'Beam Instrument'

Author: Grafiati
Published: 6 September 2023

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Journal articles on the topic "Beam Instrument"

1

Matsui, H., M. Nakamura, T. Mukai, K. Tsuruda, and H. Hayakawa. "Observations of convection in the dayside magnetosphere by the beam instrument on Geotail." Annales Geophysicae 19, no. 3 (2001): 303–10. http://dx.doi.org/10.5194/angeo-19-303-2001.

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Abstract. We report observations of magnetospheric convection by the beam instrument, EFD-B, on Geotail. The region analyzed in this study is mainly the afternoon sector of the magnetosphere between L = 9.7 - 11.5. When the instrument is operated, electron beams are emitted from guns and some of them return to detectors attached to the main body of the satellite. However, we find that the return beams are often spread over a wide range of satellite spin phase angles, so that the calculated convection is unreliable. In order to remove noisy data, we set up suitable selection criteria. We infer
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Ehlers, Georg, Morris L. Crow, Yacouba Diawara, et al. "Modern Trends in Neutron Scattering Instrument Technologies." Instruments 6, no. 3 (2022): 22. http://dx.doi.org/10.3390/instruments6030022.

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This article reviews some current trends that can be observed in the development of neutron scattering instrument technologies. While the number of neutron scattering facilities worldwide and the number of beam days they offer are largely stable, their scientific impact is increasing through improving instrumental capabilities, new and more versatile instruments, and more efficient data collection protocols. Neutron beams are becoming smaller but more intense, and instruments are being designed to utilize more ‘useful’ neutrons in unit time. This article picks and discusses a few recent develo
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3

Hundley, Craig R. "Beam and cylinder sound instrument." Journal of the Acoustical Society of America 77, no. 4 (1985): 1632. http://dx.doi.org/10.1121/1.391988.

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Cussen, L. D. "An acceptance-diagram description of beams from focusing monochromators." Journal of Applied Crystallography 35, no. 6 (2002): 702–12. http://dx.doi.org/10.1107/s0021889802015376.

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`Acceptance' diagrams are used to describe the beams produced by curved segmented (`focusing') monochromators in the kinematic approximation. This semi-analytic semi-graphical method leads to a complete description which is readily visualized in terms of instrument variables. Focusing both in and perpendicular to the scattering plane is considered. Clear relationships are identified between instrument dimensions and the beam produced. The description is directed towards neutron scattering instruments but the formalism should also apply to photons and electrons. It is demonstrated that a monoch
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5

Giannuzzi, Lucille A. "FIB/SEM Dual Beam Instrumentation: Slicing, Dicing, Imaging, and More." Microscopy and Microanalysis 7, S2 (2001): 796–97. http://dx.doi.org/10.1017/s1431927600030051.

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In a focused ion beam (FIB) instrument, ions (typically Ga+) obtained from a liquid metal ion source are accelerated down a column at energies up to ∽ 50 keV. The beam of ions is focused by electrostatic and octopole lens systems and the ion dose (and beam diameter) is controlled using real and/or virtual apertures. Beam sizes in FIB instruments on the order of 5-7 nm may be achieved.The versatility of the FIB instrument enables large regions of material (e.g., 500 μm3) to be removed at high beam currents in just a couple of minutes. Lower beam currents (i.e., beam diameters) are usually used
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Barker, J. G., C. J. Glinka, J. J. Moyer, M. H. Kim, A. R. Drews, and M. Agamalian. "Design and performance of a thermal-neutron double-crystal diffractometer for USANS at NIST." Journal of Applied Crystallography 38, no. 6 (2005): 1004–11. http://dx.doi.org/10.1107/s0021889805032103.

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An ultra-high-resolution small-angle neutron scattering (USANS) double-crystal diffractometer (DCD) is now in operation at the NIST Center for Neutron Research (NCNR). The instrument uses multiple reflections from large silicon (220) perfect single crystals, before and after the sample, to produce both high beam intensity and a low instrument background suitable for small-angle scattering measurements. The minimum detector background to beam intensity ratio (noise-to-signal, N/S) forq≥ 5 × 10−4 Å−1is 4 × 10−7. The instrument uses 2.38 Å wavelength neutrons on a dedicated thermal neutron beam p
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7

Letalick, Dietmar, and Ingmar Renhorn. "Instrument for measuring laser‐beam profiles." Review of Scientific Instruments 58, no. 5 (1987): 765–67. http://dx.doi.org/10.1063/1.1139628.

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8

Nagler, Bob, Brice Arnold, Gary Bouchard, et al. "The Matter in Extreme Conditions instrument at the Linac Coherent Light Source." Journal of Synchrotron Radiation 22, no. 3 (2015): 520–25. http://dx.doi.org/10.1107/s1600577515004865.

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The LCLS beam provides revolutionary capabilities for studying the transient behavior of matter in extreme conditions. The particular strength of the Matter in Extreme Conditions instrument is that it combines the unique LCLS beam with high-power optical laser beams, and a suite of dedicated diagnostics tailored for this field of science. In this paper an overview of the beamline, the capabilities of the instrumentation, and selected highlights of experiments and commissioning results are presented.
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9

Thomas, F. C. "Diffusion Pumps and Water Chillers." Microscopy Today 9, no. 3 (2001): 28–29. http://dx.doi.org/10.1017/s1551929500056947.

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This note concerns two very important parts of most beam instrument systems; diffusion pumps and water chillers. As we'll see below, the two can be intimately connected.Many SEMs, TEMs and other electron beam instruments contain one or more diffusion pumps as part of their vacuum systems. These are usually vertically-oriented cylindrical objects, perhaps 30 cm high, wrapped in several turns of copper tubing. They are usually placed behind or below the instrument's column, and typically handle high vacuums for tungsten filaments, or backing for ion pumps with other emitter types. Generally, the
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10

Popova, I. I., and F. X. Gallmeier. "Shielding development for the VENUS imaging instrument." Journal of Neutron Research 22, no. 2-3 (2020): 131–38. http://dx.doi.org/10.3233/jnr-200164.

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VENUS is an imaging instrument that will use a broad range of neutron wavelengths, from epithermal to cold, will include enhanced contrast mechanisms, and will offer novel energy-selective imaging techniques that directly connect the structures, properties, and function of complex engineering materials and systems to reveal practical and fundamental answers about their real-world performance. The instrument is to be built at SNS beam line 10 and will face the decoupled poisoned hydrogen moderator. The driving cost for the instrument is the beam line and instrument cave shielding. Initial scopi
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