Academic literature on the topic 'Beam'
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Journal articles on the topic "Beam"
Sharma, Prerana. "Cross Focusing of two Coaxial Gaussian Beams with Relativistic and Ponderomotive Nonlinearity." Zeitschrift für Naturforschung A 67, no. 1-2 (February 1, 2012): 10–14. http://dx.doi.org/10.5560/zna.2011-0064.
Full textHUANG, YEN-CHIEH. "LASER BEAT-WAVE BUNCHED BEAM FOR COMPACT SUPERRADIANCE SOURCES." International Journal of Modern Physics B 21, no. 03n04 (February 10, 2007): 287–99. http://dx.doi.org/10.1142/s0217979207042069.
Full textXIE, Hao, Xiaotong SUN, Yanqing MEN, Yongliang HUANG, and Yuxin CAO. "Study on failure mechanism of reinforced concrete beam based on cohesive zone model." Xibei Gongye Daxue Xuebao/Journal of Northwestern Polytechnical University 40, no. 1 (February 2022): 175–81. http://dx.doi.org/10.1051/jnwpu/20224010175.
Full textLyu, Yu-Ting, Tsung-Pin Hung, Her-Chang Ay, Hsiu-An Tsai, and Yih-Cherng Chiang. "Evaluation of Laminated Composite Beam Theory Accuracy." Materials 15, no. 19 (October 6, 2022): 6941. http://dx.doi.org/10.3390/ma15196941.
Full textPrasetyawati, Erlina, and Mochamad Solikin. "PERILAKU LENTUR PADA BALOK BETON SERAT BESI BERLUBANG MENERUS DI DAERAH TARIK." Wahana Teknik Sipil: Jurnal Pengembangan Teknik Sipil 26, no. 2 (December 1, 2021): 133. http://dx.doi.org/10.32497/wahanats.v26i2.3128.
Full textKUMAR, RAJ, H. D. PANDEY, R. P. SHARMA, and M. KUMAR. "Relativistic cross-focusing of two coaxial Gaussian laser beams in a plasma." Journal of Plasma Physics 60, no. 4 (November 1998): 811–18. http://dx.doi.org/10.1017/s0022377898007132.
Full textMei, Lidan, Nan Guo, Hongliang Zuo, Ling Li, and Guodong Li. "Influence of the Force Arm on the Flexural Performance of Prestressed Glulam Beams." Advances in Civil Engineering 2021 (January 15, 2021): 1–16. http://dx.doi.org/10.1155/2021/8831406.
Full textDu, Huanhuan, Jianyou Pan, Huaxun Shen, and Jie Dong. "Numerical Analysis of Flexural Behavior of Prestressed Steel-Concrete Continuous Composite Beams Based on BP Neural Network." Computational Intelligence and Neuroscience 2022 (May 10, 2022): 1–10. http://dx.doi.org/10.1155/2022/5501610.
Full textCao, Zhong Liang, Yan Ding, Qing Ming Hu, and Qiang Guo. "Modal Analysis of the Gantry Milling and Boring Machine Tool Beam Based on FEM." Applied Mechanics and Materials 151 (January 2012): 424–28. http://dx.doi.org/10.4028/www.scientific.net/amm.151.424.
Full textSingh, Arvinder, and Naveen Gupta. "Beat wave excitation of electron plasma wave by coaxial cosh-Gaussian laser beams in collisional plasma." Laser and Particle Beams 33, no. 4 (July 14, 2015): 621–32. http://dx.doi.org/10.1017/s0263034615000646.
Full textDissertations / Theses on the topic "Beam"
ROSSETTI, CONTI MARCELLO. "BEAM DYNAMICS FOR EXTREME ELECTRON BEAMS." Doctoral thesis, Università degli Studi di Milano, 2019. http://hdl.handle.net/2434/622706.
Full textLokhande, Ajinkya M. "Evaluation of steel I-section beam and beam-column bracing requirements by test simulation." Thesis, Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/53114.
Full textSosa, Alejandro. "Development of beam instrumentation for exotic particle beams." Thesis, University of Liverpool, 2015. http://livrepository.liverpool.ac.uk/2038259/.
Full textRatsibi, Humbelani Edzani. "Laser drilling of metals and glass using zero-order bessel beams." University of the Western Cape, 2013. http://hdl.handle.net/11394/5428.
Full textThis dissertation consists of two main sections. The first section focuses on generating zero order Bessel beams using axicons. An axicon with an opening angle y = 5⁰ was illuminated with a Gaussian beam of width ω₀ = 1.67 mm from a cw fiber laser with central wavelength λ = 1064 nm to generate zero order Bessel beams with a central spot radius r₀ = 8.3 ± 0.3 μm and propagation distance ½zmax = 20.1 ± 0.5 mm. The central spot size of a Bessel beam changes slightly along the propagation distance. The central spot radius r₀ can be varied by changing the opening angle of the axicon, y, and the wavelength of the beam. The second section focuses on applications of the generated Bessel beams in laser microdrilling. A Ti:Sapphire pulsed femtosecond laser (λ = 775 nm, ω₀ = 2.5 mm, repetition rate kHz, pulse energy mJ, and pulse duration fs) was used to generate the Bessel beams for drilling stainless steel thin sheets of thickness 50 μm and 100 μm and microscopic glass slides 1 mm thick. The central spot radius was r₀ = 15.9 ± 0.3 μm and ½zmax = 65.0 ± 0.5 mm. The effect of the Bessel beam shape on the quality of the holes was analysed and the results were discussed. It was observed that Bessel beams drill holes of better quality on transparent microscopic glass slides than on stainless steel sheet. The holes drilled on stainless steel sheets deviated from being circular on both the top and bottom surface for both thicknesses. However the holes maintained the same shape on both sides of each sample, indicating that the walls are close to being parallel. The holes drilled on the glass slides were circular and their diameters could be measured. The measured diameter (15.4±0.3 μm) of the hole is smaller than the diameter of the central spot (28.2 ± 0.1 μm) of the Bessel beam. Increasing the pulse energy increased the diameter of the drilled hole to a value close to the measured diameter of the central spot.
Motamedian, Hamid Reza. "Robust Formulations for Beam-to-Beam Contact." Licentiate thesis, KTH, Hållfasthetslära (Avd.), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-183980.
Full textKontakt mellan balkelement är en speciell typ av kontaktproblem som först analyserades 1997 av Wriggers och Zavarise med avseende på kontakt i normalriktningen. Teorin utvecklades senare av Zavarise och Wriggers och inkluderade då även kontakt i tangentiella riktningar. I dessa arbeten antas balkelementen ha ett styvt cirkulärt tvärsnitt och varje elementpar kan inte ha mer än en kontaktpunkt. Metodiken i dessa artiklar bygger på att en glipfunktion införs och därefter beräknas den inkrementella förändringen av glipfunktionen, och också dess variation, som funktion av den inkrementella förändringen av förskjutningsvektorn och dess variation. På grund av de komplicerade härledningar som resulterar, speciellt för den tangentiella kontakten, antas det att balkelementen har linjära formfunktioner. Dessutom tas ingen hänsyn till de moment som uppstår vid kontaktpunkten. I de arbeten som presenteras i denna licentiatavhandling har vi valt att inrikta oss mot frågeställningar kring enkla och robusta implementeringar, något som blir viktigt först när problemet innefattar ett stort antal kontakter. I den första artikeln i avhandlingen föreslår vi en robust formulering för normal och tangentiell kontakt mellan balkar i en 3D-rymd.Formuleringen bygger på en kostnadsmetod och på antagandet att kontaktens normal- och tangentriktning samt dess läge förblir detsamma (oberoende av förskjutning) under varje iteration. Dock uppdateras dessa storheter mellan varje iteration. Å andra sidan har inga begränsningar införts för formfunktionerna hos de underliggande balkelementen. Detta leder till en matematiskt enklare härledning samt enklare ekvationer, eftersom variationen hos glipfunktionen försvinner. Resultat framtagna med hjälp av denna formulering har verifierats och jämförts med motsvarande resultat givna av andra metoder. Den föreslagna metoden ger snabbare konvergens vilket ger möjlighet att använda större laststeg eller större omfång hos styvheten i kontaktpunkten (s.k. kostnadsstyrhet). Genom att lösa numeriska exempel påvisas prestanda och robusthet hos den föreslagna formuleringen. I den andra artikeln föreslår vi två alternativa metoder för att hantera rotationer i kontaktplanet hos balkelementen. I den första metoden linjäriseras glipfunktionen. Denna metod presenterades först av Wriggers och Zavarise. För att kunna genomföra beräkningarna ansattes linjära formfunktioner för balkelementen. Den här metoden kan användas både med kostnadsmetoder och metoder baserade på Lagrangemultiplikatorer. I den andra föreslagna metoden har vi valt att följa samma tillvägagångsätt som i vår första artikel. Detta betyder att vi antar att kontaktens normalriktning är oberoende av förskjutningarna under en iteration men uppdateras sedan mellan iterationerna. Detta tillvägagångsätt ger enklare ekvationer och har inga begränsningar vad gäller de formfunktioner som används i balkelementen. Dock är metoden begränsad till att utnyttja kostnadsmetoder. Båda de föreslagna metoderna i denna artikel ger jämförbar konvergens, prestanda och stabilitet vilket påvisas genom att lösningar till olika numeriska exempel presenteras.
QC 20160408
Kimstrand, Peter. "Beam Modelling for Treatment Planning of Scanned Proton Beams." Doctoral thesis, Uppsala University, Oncology, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-8640.
Full textScanned proton beams offer the possibility to take full advantage of the dose deposition properties of proton beams, i.e. the limited range and sharp peak at the end of the range, the Bragg peak. By actively scanning the proton beam, laterally by scanning magnets and longitudinally by shifting the energy, the position of the Bragg peak can be controlled in all three dimensions, thereby enabling high dose delivery to the target volume only. A typical scanned proton beam line consists of a pair of scanning magnets to perform the lateral beam scanning and possibly a range shifter and a multi-leaf collimator (MLC). Part of this thesis deals with the development of control, supervision and verification methods for the scanned proton beam line at the The Svedberg laboratory in Uppsala, Sweden.
Radiotherapy is preceded by treatment planning, where one of the main objectives is predicting the dose to the patient. The dose is calculated by a dose calculation engine and the accuracy of the results is of course dependent on the accuracy and sophistication of the transport and interaction models of the dose engine itself. But, for the dose distribution calculation to have any bearing on the reality, it needs to be started with relevant input in accordance with the beam that is emitted from the treatment machine. This input is provided by the beam model. As such, the beam model is the link between the reality (the treatment machine) and the treatment planning system. The beam model contains methods to characterise the treatment machine and provides the dose calculation with the reconstructed beam phase space, in some convenient representation. In order for a beam model to be applicable in a treatment planning system, its methods have to be general.
In this thesis, a beam model for a scanned proton beam is developed. The beam model contains models and descriptions of the beam modifying elements of a scanned proton beam line. Based on a well-defined set of generally applicable characterisation measurements, ten beam model parameters are extracted, describing the basic properties of the beam, i.e. the energy spectrum, the radial and the angular distributions and the nominal direction. Optional beam modifying elements such as a range shifter and an MLC are modelled by dedicated Monte Carlo calculation algorithms. The algorithm that describes the MLC contains a parameterisation of collimator scatter, in which the rather complex phase space of collimator scattered protons has been parameterised by a set of analytical functions.
Dose calculations based on the phase space reconstructed by the beam model are in good agreement with experimental data. This holds both for the dose distribution of the elementary pencil beam, reflecting the modelling of the basic properties of the scanned beam, as well as for complete calculations of collimated scanned fields.
Eriksson, Samuel, and Erik Rudqvist. "Double-decker beam of beam of bamboo - An alternative to I-section beams in construction of multistory housing." Thesis, KTH, Skolan för teknikvetenskap (SCI), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-278903.
Full textIn a world in constant development, with an increase in population and an urbanisation greater than ever, huge requirements are put on the housing industry. A need for small impact on the environment, to be able to house multiple families in one building, and also keeping the cities compact to be able to supply basic public services in an efficient manner. This is often solved by building higher and higher. An alternative solution to make these higher buildings more environmentally friendly and cheaper would be to use a material vastly available, bamboo. This report deals with the double-decker beam, the brain child of Saevfors Consulting, that would be used in such a construction. It is described how this double-decker beam would be constructed in order to be optimized in regards to deformation and stresses. The double-decker beam consists of two bamboo culms interconnected by reinforced concrete struts. It is optimized in regards to four main design parameters. Namely, the number of struts, the strut placement, the angle of the struts and the distance between the two bamboo culms. These were evaluated with the help of simplified calculations made in Matlab, which were in turn verified by more complex simulations in ANSYS Mechanical. The final version of the 4 m long double-decker beam had a total of five struts. The outermost strut being placed at the origin of the culm, and the second strut placed at a distance of 0,84 m from the origin, both being reclined 45°. These are then mirrored in the vertical central strut, and so the double-decker beam takes on a symmetrical appearance.
Hao, Yue. "Beam-beam interaction study in ERL based eRHIC." [Bloomington, Ind.] : Indiana University, 2008. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3337273.
Full textTitle from PDF t.p. (viewed on Jul 29, 2009). Source: Dissertation Abstracts International, Volume: 69-12, Section: B, page: 7579. Adviser: Shyh-Yuan Lee.
Münnich, Matthias. "Beam Deflection." Master's thesis, University of Central Florida, 2013. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5823.
Full textM.S.
Masters
Optics and Photonics
Optics and Photonics
Optics; International
Lai, Jackie, and Johnny Huynh. "Box Beam." Thesis, Tekniska Högskolan, Högskolan i Jönköping, JTH, Maskinteknik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-31572.
Full textBooks on the topic "Beam"
1941-, Dickey Fred M., Holswade Scott C. 1963-, and Shealy David L, eds. Laser beam shaping applications. Boca Raton, FL: Taylor & Francis/CRC Press, 2006.
Find full text1941-, Dickey Fred M., and Holswade Scott C. 1963-, eds. Laser beam shaping: Theory and techniques. New York: Marcel Dekker, 2000.
Find full textAlberto, Sona, European Physical Society, European Federation for Applied Optics., and Society of Photo-optical Instrumentation Engineers., eds. Beam diagnostics and beam handling systems: ECO1 21-22 September 1988, Hamburg, Federal Republic of Germany. Bellingham, Wash., USA: SPIE--International Society for Optical Engineering, 1989.
Find full textThe optics of charged particle beams. Chur, Switzerland: Harwood Academic Publishers, 1987.
Find full textCentre, Bhabha Atomic Research, ed. Shielding report for Indus-2 beamlines. Mumbai: Bhabha Atomic Research Centre, 2007.
Find full textCarrera, Erasmo, Gaetano Giunta, and Marco Petrolo. Beam Structures. Chichester, UK: John Wiley & Sons, Ltd, 2011. http://dx.doi.org/10.1002/9781119978565.
Full textAnita, Straker, ed. Beam starters. London: Harcourt Brace Jovanovich, 1992.
Find full textBrettingham, Laurie. Beam Benders. Available via website
C, Parker E. H., ed. The Technology and physics of molecular beam epitaxy. New York: Plenum Press, 1985.
Find full textLitewka, Przemysław. Finite Element Analysis of Beam-to-Beam Contact. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-12940-7.
Full textBook chapters on the topic "Beam"
Shiltsev, V., and A. Valishev. "Beam–Beam Effects." In Accelerator Physics at the Tevatron Collider, 411–37. New York, NY: Springer New York, 2014. http://dx.doi.org/10.1007/978-1-4939-0885-1_8.
Full textBerz, Martin, Kyoko Makino, and Weishi Wan. "Beams and Beam Physics." In An Introduction to Beam Physics, 1–30. Boca Raton: CRC Press, 2014. http://dx.doi.org/10.1201/b12074-1.
Full textDujmović, Darko, Boris Androić, and Ivan Lukačević. "Beam to Beam Joints." In Composite Structures According to Eurocode 4, 879–82. D-69451 Weinheim, Germany: Wiley-VCH Verlag GmbH, 2015. http://dx.doi.org/10.1002/9783433604908.ch25.
Full textGooch, Jan W. "Beam." In Encyclopedic Dictionary of Polymers, 71. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_1156.
Full textWeik, Martin H. "beam." In Computer Science and Communications Dictionary, 111. Boston, MA: Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_1428.
Full textGreve, Albert, and Michael Bremer. "Beam Formation and Beam Degradation." In Thermal Design and Thermal Behaviour of Radio Telescopes and their Enclosures, 305–24. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-03867-9_12.
Full textLitewka, Przemysław. "Frictionless Beam-to-Beam Contact." In Finite Element Analysis of Beam-to-Beam Contact, 13–37. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-12940-7_2.
Full textOtto, Thomas. "Beam Hazards and Ionising Radiation." In Safety for Particle Accelerators, 55–82. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-57031-6_3.
Full textRoser, Thomas. "Past, Present, and Future of Polarized Hadron Beams." In Polarized Beam Dynamics and Instrumentation in Particle Accelerators, 1–12. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-16715-7_1.
Full textMinty, Michiko G., and Frank Zimmermann. "Cooling." In Particle Acceleration and Detection, 263–300. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-662-08581-3_11.
Full textConference papers on the topic "Beam"
Kikutani, E. "Beam-beam simulation with non-Gaussian beams." In Beam dynamics issues of high luminosity asymmetric collider rings. AIP, 1990. http://dx.doi.org/10.1063/1.39748.
Full textGallegos, Floyd R. "LANSCE beam current limiter." In Beam instrumentation. AIP, 1997. http://dx.doi.org/10.1063/1.52300.
Full textPatterson, Donald R. "Initial commissioning results from the APS loss monitor system." In Beam instrumentation. AIP, 1997. http://dx.doi.org/10.1063/1.52301.
Full textKahana, Emmanuel, and Youngjoo Chung. "Commissioning results of the APS storage ring RF beam position monitors." In Beam instrumentation. AIP, 1997. http://dx.doi.org/10.1063/1.52285.
Full textOlson, M., and A. A. Hahn. "Position and collision point measurement system for Fermilab’s interaction regions." In Beam instrumentation. AIP, 1997. http://dx.doi.org/10.1063/1.52302.
Full textPuzo, P., J. Buon, J. Jeanjean, F. LeDiberder, and V. Lepeltier. "A submicronic beam size monitor for the final focus test beam." In Beam instrumentation. AIP, 1997. http://dx.doi.org/10.1063/1.52286.
Full textShintake, Tsumoru. "Beam profile monitors for very small transverse and longitudinal dimensions using laser interferometer and heterodyne techniques." In Beam instrumentation. AIP, 1997. http://dx.doi.org/10.1063/1.52275.
Full textBarry, Walter. "Measurement of subpicosecond bunch profiles using coherent transition radiation." In Beam instrumentation. AIP, 1997. http://dx.doi.org/10.1063/1.52276.
Full textLihn, Hung-chi. "Measurement of subpicosecond electron pulse length." In Beam instrumentation. AIP, 1997. http://dx.doi.org/10.1063/1.52277.
Full textFox, J. D., R. Claus, H. Hindi, I. Linscott, S. Prabhakar, W. Ross, D. Teytelman, et al. "Observation, control, and modal analysis of longitudinal coupled-bunch instabilities in the ALS via a digital feedback system." In Beam instrumentation. AIP, 1997. http://dx.doi.org/10.1063/1.52278.
Full textReports on the topic "Beam"
Ng, King-Yuen. Linear beam-beam effects for round beams. Office of Scientific and Technical Information (OSTI), January 1988. http://dx.doi.org/10.2172/6876253.
Full textKim, Hyung Jin. Beam-Bem interactions. Office of Scientific and Technical Information (OSTI), December 2011. http://dx.doi.org/10.2172/1038932.
Full textZiemann, V. Beam-beam deflection and signature curves for elliptic beams. Office of Scientific and Technical Information (OSTI), October 1990. http://dx.doi.org/10.2172/6431631.
Full textSramek, Christopher. Beam-Beam Interactions. Office of Scientific and Technical Information (OSTI), September 2003. http://dx.doi.org/10.2172/815651.
Full textHahn, H. Beam-Beam Limited Luminosity. Office of Scientific and Technical Information (OSTI), February 1985. http://dx.doi.org/10.2172/1119032.
Full textAbreu N. P. and W. Fischer. Emittance growth with offset beam-beam collisions and small beam-beam parameters. Office of Scientific and Technical Information (OSTI), August 2007. http://dx.doi.org/10.2172/1061875.
Full textShiltsev, V., and A. Zinchenko. Electron beam distortions in beam-beam compensation set-up. Office of Scientific and Technical Information (OSTI), April 1998. http://dx.doi.org/10.2172/603075.
Full textBatygin, Y., and T. Katayama. Beam-Beam Simulation at RHIC. Office of Scientific and Technical Information (OSTI), February 1997. http://dx.doi.org/10.2172/1149835.
Full textBane, Karl LF. Beam-Beam Experience at KEKB. Office of Scientific and Technical Information (OSTI), November 2002. http://dx.doi.org/10.2172/808675.
Full textBishofberger, Kip Aaron. Successful Beam-Beam Tuneshift Compensation. Office of Scientific and Technical Information (OSTI), January 2005. http://dx.doi.org/10.2172/1223265.
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