1-20 of 112 Search Results for

collimators

Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Image
Published: 01 January 1986
Fig. 1 Basic methods of collimating x-rays. (a) Slit and pinhole collimation. (b) Kratky collimation using beam stops B1, B2, and B3. (c) Curved mirror focusing camera. Source: Ref 5 More
Series: ASM Handbook Archive
Volume: 10
Publisher: ASM International
Published: 01 January 1986
DOI: 10.31399/asm.hb.v10.a0001763
EISBN: 978-1-62708-178-8
...Abstract Abstract This article presents the experimental and theoretical aspects of small-angle scattering, and discusses specific applications used in the characterization of metals, glasses, polymers, and ceramics. The basic methods of collimating x-rays, the cause of smearing from a line...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006455
EISBN: 978-1-62708-190-0
... for the radiography of plates, cylinders, and flanges. The article discusses various control methods, including the use of lead screens; protection against backscatter and scatter from external objects; and the use of masks, diaphragms, collimators, and filtration. The radiographic appearance of specific types...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006448
EISBN: 978-1-62708-190-0
... radiation: use of lead screens; protection against backscatter and scatter from external objects; and use of masks, diaphragms, collimators, and filtration. The article concludes with a discussion on image conversion media, including recording media, lead screens, lead oxide screens, and fluorescent...
Image
Published: 01 August 2018
Fig. 32 Example of an in-motion radiography facility showing (a) the facility, (b) a closeup of the source robot, and (c) the collimator and slits More
Image
Published: 01 August 2018
Fig. 35 Comparison of radiography and computed tomography. (a) Conventional projection radiography. (b) Computed tomography using slit collimation More
Image
Published: 01 January 1986
Fig. 8 Geometry of the Bragg-Brentano diffractometer. F, line source of x-rays from the anode of the x-ray tube; P, soller slits (collimator); D, divergent slit; A, axis about which sample and detector rotate; S, sample; R, receiving slit; RP, receiving soller slits; SS, scatter slit More
Image
Published: 01 August 2018
cannot be employed in a valid manner. By way of comparison, in the case of SLAM, because collimated energy is used, the edge effect is minor and limited only by diffraction of the illumination wave at the edges (also shown in side view, upper figure, and top view, lower figure). More
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005630
EISBN: 978-1-62708-174-0
... used. These lens elements can be reflective or transmissive. Collimator focal lengths of 60, 75, 100, 120, 150, and 200 mm are common. Focus lenses range from 100, 125, 150, 200, 250, to 300 mm. Even longer focal lengths are used in remote welding ( Ref 6 ). The economic availability of these optics...
Series: ASM Handbook
Volume: 24
Publisher: ASM International
Published: 15 June 2020
DOI: 10.31399/asm.hb.v24.a0006583
EISBN: 978-1-62708-290-7
...-bed systems Selective laser melting (SLM) Mo Hardness and compressive strength can match the properties of material produced by conventional PM Tensile/bending strength severely limited by microcracks ++ ++ + Commercial production W ++ ++ + X-ray collimators in production Microparts...
Series: ASM Handbook
Volume: 24
Publisher: ASM International
Published: 15 June 2020
DOI: 10.31399/asm.hb.v24.a0006545
EISBN: 978-1-62708-290-7
... take place by using either transmitting (e.g., refractive lenses) or reflective (e.g., mirrors) optics. In both cases, a focal length can be assigned to an optic. When incident on an optic with a positive focal length, a collimated beam will form a focus near the focal distance. A collimated beam...
Series: ASM Handbook
Volume: 10
Publisher: ASM International
Published: 15 December 2019
DOI: 10.31399/asm.hb.v10.a0006656
EISBN: 978-1-62708-213-6
... to alter the sample by grinding. Thus, objects can be analyzed without sampling, by collimating the incident x-ray beam and aligning it on an area of interest. Using a conventional laboratory x-ray source, a target spot size diameter as low as 30 μm can be achieved while still maintaining a realistic...
Series: ASM Handbook
Volume: 10
Publisher: ASM International
Published: 15 December 2019
DOI: 10.31399/asm.hb.v10.a0006644
EISBN: 978-1-62708-213-6
...-divergent x-ray beams of wide spectral range has allowed the extensive development of synchrotron x-ray topography techniques. General Principles In x-ray diffraction topography, a collimated area-filling ribbon of x-rays is incident on the single-crystal sample at a set Bragg angle...
Series: ASM Handbook Archive
Volume: 10
Publisher: ASM International
Published: 01 January 1986
DOI: 10.31399/asm.hb.v10.a0001757
EISBN: 978-1-62708-178-8
... availability and prevalence. In general, an x-ray powder diffraction characterization of a substance consists of placing a powder sample in a collimated monochromatic beam of x-radiation. For crystalline materials, diffraction takes place as described in “Introduction to Diffraction Methods” to produce...
Series: ASM Handbook Archive
Volume: 10
Publisher: ASM International
Published: 01 January 1986
DOI: 10.31399/asm.hb.v10.a0001765
EISBN: 978-1-62708-178-8
... or pulsed neutron sources; in fact, however, constant-wavelength data is the preferred method at the former, while constant-angle data are collected in the time-of-flight mode at pulsed neutron sources. For reactors, data are generally collected in a Debye-Scherrer geometry with a highly collimated...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001399
EISBN: 978-1-62708-173-3
... to reach the solder melting temperature are relatively small, confining thermal energy to a small area is critical. The focus of gas flow is usually controlled via nozzle design or the use of baffle plates. The nozzle collimates the gas stream to optimize the gas impingement across one or more solder...
Series: ASM Handbook
Volume: 10
Publisher: ASM International
Published: 15 December 2019
DOI: 10.31399/asm.hb.v10.a0006680
EISBN: 978-1-62708-213-6
... than any other analytical method explains its importance in many industrial applications as well as its wide availability and prevalence. In general, an XRPD characterization of a substance consists of placing a sample in a collimated monochromatic x-ray beam. For crystalline materials, diffraction...
Series: ASM Handbook Archive
Volume: 10
Publisher: ASM International
Published: 01 January 1986
DOI: 10.31399/asm.hb.v10.a0001728
EISBN: 978-1-62708-178-8
... and passes to the collimating mirror. The collimated light strikes the plane diffraction grating and is diffracted at an angle dependent on its wavelengh. Some of the light is diffracted at angles such that it strikes the focusing mirror. It is then focused to form an array of entrance slit images...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006456
EISBN: 978-1-62708-190-0
... (collimated x-ray beam) and the registration of a 2-D projection can be used. In cases with particularly dense or thick workpieces or scattering problems, linear detectors still remain the most suitable. Indeed, LDAs provide better signal-to-noise ratio and resist higher x-ray energy. In either case...
Series: ASM Handbook
Volume: 10
Publisher: ASM International
Published: 15 December 2019
DOI: 10.31399/asm.hb.v10.a0006654
EISBN: 978-1-62708-213-6
... of the tube. This fraction of x-rays is too divergent to be directly used for any diffraction measurements. Laboratory diffractometers have presample slits or optics to trim and collimate the radiation, which significantly reduces the flux of photons on the sample. Synchrotron x-rays, on the other hand...