Relevant bibliographies by topics / Collimated beam test

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  1. Journal articles
  2. Dissertations / Theses
  3. Conference papers

Academic literature on the topic 'Collimated beam test'

Author: Grafiati
Published: 20 August 2021
Last updated: 29 July 2025

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Journal articles on the topic "Collimated beam test"

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Damayanti, Oktarina, and Indra Gunawan. "Uji Kesesuaian Berkas Cahaya Kolimasi pada Pesawat Sinar-X di Politeknik Al-Islam Bandung." Jurnal Imejing Diagnostik (JImeD) 7, no. 2 (2021): 111–13. http://dx.doi.org/10.31983/jimed.v7i2.6596.

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Background : Suitability test for light collimation are tests to ensure that x-ray aircraft meet radiation safety requirements and provide precise and accurate diagnostic or diagnostic information. Suitability test for light collimation is carried out on x-ray aircraft at Al-Islam Bandung Politeknik.Methods: The research method used in quantitative experimental method. The suitability test was carried out with a collimator test tool and beam alignment test tool placed on the tape then performed an experiment using an exposure factor of 75 Kv, 200 mA and 8 mAs with FFD 100 cm.Results: Based on
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BAIWEN, LI, S. ISHIGURO, M. M. šKORIĆ, H. TAKAMARU, and T. SATO. "Acceleration of high-quality, well-collimated return beam of relativistic electrons by intense laser pulse in a low-density plasma." Laser and Particle Beams 22, no. 3 (2004): 307–14. http://dx.doi.org/10.1017/s0263034604223151.

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The mechanism of electron acceleration by intense laser pulse interacting with an underdense plasma layer is examined by one-dimensional particle-in-cell (1D-PIC) simulations. The standard dephasing limit and the electron acceleration process are discussed briefly. A new phenomenon, of short high-quality, well-collimated return relativistic electron beam with thermal energy spread, is observed in the direction opposite to laser propagation. The process of the electron beam formation, its characteristics, and the time-history inxandpxspace for test electrons in the beam, are analyzed and expose
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NOWAK, S., and A. OREFICE. "Quasi-optical description of reflection, focusing and plasma cut-offs of electron cyclotron Gaussian beams." Journal of Plasma Physics 57, no. 2 (1997): 349–61. http://dx.doi.org/10.1017/s0022377896004850.

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In the analysis of the propagation of electromagnetic waves in the electron cyclotron frequency range, in both isotropic media and magnetoactive plasmas, the role of diffractive effects, which are not accounted for by geometrical optics, may no longer be neglected when highly collimated beams are to be employed. Moreover, when lenses, mirrors, refractive gradients and/or wave cut-offs are placed along the beam trajectory, the very concept of independent optical rays tends to introduce singularities, which do not always correspond to physical features. A quasi-optical approach has previously be
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Dozier, Charles M., and Noureddine Anibou. "An innovative EDXRD verification probe." Powder Diffraction 24, no. 2 (2009): 102–6. http://dx.doi.org/10.1154/1.3131802.

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Verification of materials is an increasingly important need in pharmaceutical distribution. XStream Systems, Inc. has developed an energy dispersive X-ray diffraction (EDXRD) system which can quickly verify crystalline pharmaceuticals in the distribution cycle. Materials may be in solid or powder form and the technique is nondestructive. Unlike angular X-ray diffraction (AXRD), a “white” X-ray beam between 20 and 80 keV is used. This energetic beam can penetrate through relatively thick materials, diffracting from crystallites within the samples. Materials can be observed even when they are lo
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Ogawa, I., Y. Kawashima, T. Hiraiwa, et al. "Development of the laser isotope separation method to study for the neutrino-less double beta decay of 48Ca." Journal of Physics: Conference Series 2147, no. 1 (2022): 012012. http://dx.doi.org/10.1088/1742-6596/2147/1/012012.

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Abstract Search for the ultra-rare process, neutrino-less double beta decay, is a powerful tool to test the Majorana nature of neutrinos. Among the potential double beta decay nuclei, 48Ca has the largest Q-value, hence we can expect the measurement with least background. On the other hand, due to its low natural abundance, isotope enrichment is essential to achieve the sensitivity in the region of interest (inverted/normal mass hierarchy of neutrinos). We have been developing a laser isotope separation method using a tunable semiconductor laser that can excite only a specific isotope (48Ca).
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Gavlina, A. E., D. A. Novikov, and M. V. Askerko. "Orthogonal ray scheme: a method for processing interference patterns and reconstructing the shape of a test convex mirror." Journal of Physics: Conference Series 2127, no. 1 (2021): 012066. http://dx.doi.org/10.1088/1742-6596/2127/1/012066.

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Abstract This report is devoted to the processing of the interference pattern of the tested mirror, obtained using the orthogonal ray scheme, where the convex testing surface is illuminated by a collimated beam, which is perpendicular to the optical axis of the surface. The interference pattern is created by two wavefronts, one of which is reflected from the mirror, while the other wavefront bypasses the mirror and travels directly to the detector plane. The result of interference pattern processing is a topography map formed by several tangential profiles. The proposed method is suited for la
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Korytár, D., P. Vagovič, K. Végsö, et al. "Potential use of V-channel Ge(220) monochromators in X-ray metrology and imaging." Journal of Applied Crystallography 46, no. 4 (2013): 945–52. http://dx.doi.org/10.1107/s0021889813006122.

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While channel-cut crystals, in which the diffracting surfaces in an asymmetric cut are kept parallel, can provide beam collimation and spectral beam shaping, they can in addition provide beam compression or expansion if the cut is V-shaped. The compression/expansion ratio depends in this case on the total asymmetry factor. If the Ge(220) diffraction planes and a total asymmetry factor in excess of 10 are used, the rocking curves of two diffractors will have a sufficient overlap only if the second diffractor is tuned slightly with respect to the first one. This study compares and analyses sever
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Mutalik, Sunil, and Aditya Tadinada. "Assessment of relationship between extracranial and intracranial carotid calcifications—a retrospective cone beam computed tomography study." Dentomaxillofacial Radiology 48, no. 8 (2019): 20190013. http://dx.doi.org/10.1259/dmfr.20190013.

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Objectives: Cone beam CT scans in current day dental practice are highly collimated yet involve areas along the course of the extracranial carotid artery. Detecting an extracranial carotid calcification on small volume scans leaves the dentist with two questions: whether the patient is likely to have intracranial carotid calcifications and whether the patient warrants further medical attention. This study aimed to assess the presence of intracranial carotid artery calcifications (ICAC) in the presence of extracranial carotid artery calcifications (ECAC). Methods: 450 CBCT scans were retrospect
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Cantone, C., S. Ceravolo, F. Colao, et al. "R&D status for an innovative crystal calorimeter for the future Muon Collider." EPJ Web of Conferences 288 (2023): 02002. http://dx.doi.org/10.1051/epjconf/202328802002.

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The measurement of physics processes at new energy frontier experiments requires excellent spatial, time, and energy resolutions to resolve the structure of collimated high-energy jets. Calorimeters, as other detectors, must face this increasing performance demand. In a future TeV-scale Muon Collider, the beam-induced background (BIB) represents the main challenge in the design of the detectors and of the event reconstruction algorithms and can pose serious limitations to the physics performance. However, it is possible to reduce the BIB impact on the Muon Collider calorimeter by exploiting so
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Elhoushy, Ahmed A., Mohamed H. Hassan, Abdelfattah Y. Soliman, and Mohsen A. Abou Mandour. "Use of Gamma Ray Back Scattering Method for Corrosion Assessment in Insulated Pipes." Key Engineering Materials 786 (October 2018): 165–73. http://dx.doi.org/10.4028/www.scientific.net/kem.786.165.

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Corrosion of insulated pipes is a major problem in nuclear,petrochemical and other industries.This type of corrosion is difficult to measure by the available techniques of ultrasound and transmission gamma or x-ray radiography due to the presence of insulating material and limited accessibility to both sides. Gamma-ray backscattering technique is a non-contactmethod and is highly suitable for buried insulated pipes where access is limited to one side only.In the present work, MCNP5 code was used to simulate a case where pipe corrosion (i.e., wall thinning) was measured by gamma backscattered t
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Dissertations / Theses on the topic "Collimated beam test"

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Rudengren, Isabella, and Julia Dahlberg. "Experimental characterization of focal ratio degradation of optical fibers due to various coupling technologies." Thesis, Uppsala universitet, Institutionen för materialvetenskap, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-447132.

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The goal of this project was to develop a measuring method and software code to determine and compare the focal ratio degradation of optical fibers for two different coupling technologies. One of the couplings used a fusing technology to splice the fiber, and the other coupling used a refractive index matching technology. Also, an optical fiber without any cleaving or splicing was used as a reference. A collimated beam test was developed as a method for measuring the focal ratio degradation for these different fiber couplings, and a software code was developed to process the results of the exp
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Conference papers on the topic "Collimated beam test"

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Tenjimbayashi, Koji. "New type of Twymann-Green interferometer using a HOE." In OSA Annual Meeting. Optica Publishing Group, 1991. http://dx.doi.org/10.1364/oam.1991.wa8.

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A new type of Twymann-Green interferometer developed here mainly consists of a collimated He-Ne laser beam, a holographic optical element (HOE), a reference flat mirror, an imaging lens, and a screen. The HOE is made using a collimated reference beam and a diverging spherical object beam. In the interferometer the HOE, illuminated from its back by a collimated beam, diffracts a spherical wavefront and transmits the collimated beam. The former beam is reflected by a spherical mirror under test, passes through the HOE, and reaches to a screen. The latter beam is reflected by a flat reference mir
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DiLaura, David L. "Calculation of Occluded Diffuse and Nondiffuse Radiative Exchange Shape Factors Between Polygons." In ASME 2005 Summer Heat Transfer Conference collocated with the ASME 2005 Pacific Rim Technical Conference and Exhibition on Integration and Packaging of MEMS, NEMS, and Electronic Systems. ASMEDC, 2005. http://dx.doi.org/10.1115/ht2005-72706.

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A procedure is described to calculate the radiative exchange shape factor between polygons. The spatial distribution of the emitting surface can be arbitrary and occluding surfaces are taken into account. Emitted radiant power is discretized into collimated, homogeneous beams leaving in a 3-dimensional, angular spray. Since a beam is homogeneous, the flux transported to a receiving surface is proportional to the intersection area of beam and surface. Occluding surfaces change the shape of the areas of intersection by casting collimated shadows. The total radiant power transported is proportion
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Cochran, Eugene R. "Testing methods for evaluating the quality of a general purpose collimated laser source." In OSA Annual Meeting. Optica Publishing Group, 1989. http://dx.doi.org/10.1364/oam.1989.thf6.

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A precision collimated reference source (CRS) is manufactured by the Wyko Corp. This source has two functions: first, the CRS allows the user to verify the performance of the Wyko Ladite system, and second, it may serve as a characterized input to test the system response of an unknown system under test. Wavefront irregularity of the CRS unit is specified at <λ/100 rms over the central 6-mm clear aperture diameter. Collimation of the beam is specified at better than λ /15 peak to valley. Since residual aberrations present in the CRS are smaller than the aberrations inherent in the Wyko Ladi
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Zhang, Jingwen, Haiying Xu, Hongbin Pu, Yang Yuan, Kebin Xu, and Quanzhong Jiang. "Real-time double-exposure interferometries using a self-pumped conjugator with Cu:KNSBN crystal." In OSA Annual Meeting. Optica Publishing Group, 1991. http://dx.doi.org/10.1364/oam.1991.thmm49.

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We describe real-time double-exposure interferometies with an internally self-pumped conjugator employed by a photorefractive crystal Cu:KNSBN. The device offers many advantages as a nondestructive testing device: elimination of the effects of turbulence or optical distortion, self-alignment, high reflectivity, and so on. In our experiment, an argon ion laser beam at 0.515 μm is expanded and collimated to a 4-cm diameter beam size. The collimated beam passes through a transparent test object and is focused into a photorefractive crystal Cu:KNSBN with 51% phase-conjugate reflectivity. A beam sp
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Brinkmann, S., Th Dresel, R. Schreiner, and J. Schwidet. "Axicon-type test interferometer for cylindrical surfaces." In The European Conference on Lasers and Electro-Optics. Optica Publishing Group, 1996. http://dx.doi.org/10.1364/cleo_europe.1996.cmd6.

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Interferometric testing of technical surfaces makes a reduction of the sensitivity necessary to deal with the rather big surface deformations and the micro-roughness due to the machining process. Therefore, grazing incidence interferometry is commonly used for planar work pieces. Here we report on the testing of cylindrical surfaces which makes use of computer generated holograms having cylindrical symmetry as beam splitters and recombining elements. The principle of the interferometer has been invented earlier/1/ and is given in Fig. 1. The collimated light beam from a laser impinges onto the
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Fu, Yutian, and Qinbo Zheng. "Research on Analysis & Modification of Deviation in Spectral Calibration of Optical Remote Sensors." In International Optical Design Conference. Optica Publishing Group, 1998. http://dx.doi.org/10.1364/iodc.1998.ltud.10.

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The optical system of the spectral-calibration facility of an optical remote sensor is composed of a grating monochromator and an assistant collimator. If the optical system meet the following two requirements, an accurate spectral responsive function of the tested system can be obtained: first, a collimated beam fills up the aperture of the tested instrument; secondly, the real image formed by the exit slit of the monochrometer covers the whole field stop of the tested instrument1. For most of the optical remote sensor with large aperture and large field of view, the optical system of the cal
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Payton, M. E., and E. E. Burcher. "Portable Infrared Stiumulus for the Halogen Occultation Experiment." In Optical Fabrication and Testing. Optica Publishing Group, 1986. http://dx.doi.org/10.1364/oft.1986.tha3.

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The testing of the Halogen Occultation Experiment (HALOE) requires that a source simulating the sun be available during various tests. This source must be able to be moved from one test area to another, and also be used in a thermal/vacuum chamber during environmental testing, The Portable Stimulus Test Set (PSTS) was designed to meet these criteria. The PSTS consists of a modified blackbody and an off axis parabolic mirror used together to produce a 10-inch collimated beam. The off-axis parabolic mirror blank, composed of aluminum, was machined on numerically controlled equipment. Because of
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Morrison, R. L., S. L. Walker, F. A. P. Tooley, F. B. McCormick, and T. J. Cloonan. "Computer generated holograms for free-space digital optics." In OSA Annual Meeting. Optica Publishing Group, 1991. http://dx.doi.org/10.1364/oam.1991.turr1.

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AT&T's photonics switching technology group has demonstrated a series of prototype systems of increasing complexity to test and illustrate the feasibility of free-space digital optical systems. Computer generated holograms (CGH) were incorporated into a multistage system demonstration (i) to distribute optical power and illuminate an array of optical processors,1 and (ii) to form interconnections between stages. A 64 × 64 spot array was generated by illuminating a CGH with a collimated laser beam. The spot array intensity was required to vary by <20% between minimum and maximum intensit
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Giacoma, Jordan, Jorge Ahumada Lazo, Haipeng Zhang, and Yang Liu. "Characterization of Droplet Dynamics Under Impact of a Shockwave Interacting With a Solid Surface." In ASME 2024 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2024. https://doi.org/10.1115/imece2024-145987.

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Abstract This paper presents an experimental study on the transient deformation and breakup morphology of a water droplet as it approaches a solid surface driven by an interaction with a shockwave. A droplet injection system integrated into the top of the Shock Tube Test Section produces consistently sized water droplets of a prescribed diameter. A super-sonic shockwave is then shot at the falling water droplet. A high-speed imaging system, consisting of two high-speed cameras, a high-intensity LED point light source, and a series of optics, is used to visualize the complex shock-droplet-surfa
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Inanc, Feyzi, Allan Jones, Peng Yuan, Toyli Anniyev, Johan Kverneland, and Pierre Chuilon. "Technical Feasibility of a Through Tubing Circumferential Zonal Isolation Gamma Scanner for Plug and Abandonment Implementations." In ADIPEC. SPE, 2022. http://dx.doi.org/10.2118/211538-ms.

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Abstract This paper presents a feasibility study of a novel nuclear sensor design toward finding volumetric flaws in cement behind two or more tubulars in a wellbore. The sensor concept targets plug and abandonment activities and the presented results include experimental test setups built for the purpose, results of simulations and experiments conducted for determining the range of applicability. The measurement is based on a gamma-gamma measurement concept that incorporates a rotating interrogating beam illuminating the wellbore for an azimuthal scan while the tool is in motion in the boreho
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