Relevant bibliographies by topics / Circular Beams

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Circular Beams'

Author: Grafiati
Published: 4 June 2021
Last updated: 7 February 2022

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Journal articles on the topic "Circular Beams"

1

Bandres, Miguel A., and Julio C. Gutiérrez-Vega. "Circular beams." Optics Letters 33, no. 2 (January 11, 2008): 177. http://dx.doi.org/10.1364/ol.33.000177.

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Florencio, Rafael, Daniel Martinez-de-Rioja, Eduardo Martinez-de-Rioja, Jose A. Encinar, Rafael R. Boix, and Vicente Losada. "Design of Ku- and Ka-Band Flat Dual Circular Polarized Reflectarrays by Combining Variable Rotation Technique and Element Size Variation." Electronics 9, no. 6 (June 12, 2020): 985. http://dx.doi.org/10.3390/electronics9060985.

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In this work circularly polarized flat reflectarray antennas are designed to work at downlink frequencies in Ku- and Ka-band. The design approach for circular polarization radiation combines both the variable rotation technique (VRT) and the element size variation technique (ESVT). The reflectarray element employed consists of a rotable split ring operating at 12 GHz (Ku-band) that surrounds two orthogonal sets of parallel dipoles of variable size operating at 20 GHz (Ka-band). Rotations of split rings and different sizes of dipoles are exploited as degrees of freedom by VRT and ESVT for designing focused beams dual band dual circular polarized reflectarrays. The split ring can be used to achieve single focused beams for circular polarization by VRT at 12 GHz, and the set of orthogonal dipoles can be used to achieve two focused beams for dual circular polarization by ESVT at 20 GHz. In this way, the reflectarray element has been used to design two flat dual band circularly polarized reflectarrays that generate three pencil beams either in the same direction or in different directions: one pencil beam with right-hand circular polarization (RHCP) at 12 GHz and two pencil beams with both RHCP and left-hand circular polarization (LHCP) at 20 GHz. The designed reflectarrays are carried out under local periodicity assumption by means of in-house electromagnetic software that applies the Method of Moments in the Spectral Domain. Validations of the in-house electromagnetic software show significant CPU time savings with respect to CPU time consumption provided by commercial software of general purpose as CST electromagnetics software. Numerical results of radiation patterns produced by the designed reflectarrays show efficiencies around 65% and a bandwidth of 6% for a main beam cross-polarization discrimination of 25 dB. The numerical results are satisfactorily validated by CST software and a tolerance errors study has been numerically carried out with acceptable results.
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Abdulrahman, Mazin B., Layth A. Al-Jaber, and Saba S. Hasan. "The Effect of Opening Size and Location on the Performance of Reinforced Concrete T-Beams under Pure Torque." Tikrit Journal of Engineering Sciences 27, no. 2 (March 15, 2020): 46–53. http://dx.doi.org/10.25130/tjes.27.2.06.

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In modern buildings, transverse openings are often used in order to pass the pipes of health services, electrical cables or air conditioning ducts and other prepuce. The presence of these openings leads to a weakening of the beam so it must work to investigate the behavior of these beams in order to know how the presence of openings affects beam resistance. In this research, the behavior of reinforced concrete T-beams with circular openings exposed to pure torsional moment is studied. The experimental program involves testing of five beams with same dimensions and reinforcements. One of them is solid beam and used as reference for comparison with other beams with an opening and the other four T- beams containing circular openings of deferent dimension(100 and 150) and location(Lc/2 and Lc/3). Practical results show that the Tbeam with circular openings of diameter (100mm) with different locations (Lc/2 and Lc/3), where Lc is the clear span of the beam, have an ultimate torsional capacity lower than that for solid beam by about (23% and 30%) respectively. The increase of the openings size causes a significant decrease in torsional capacity, where the beams with circular openings of diameter (150mm) with different locations (Lc/2 and Lc/3) have an ultimate torsional capacity lower than that for solid beam by about (56 % and 61%) respectively. Practical results show also that the presence of circular openings with diameter of 47% and 71% from the total depth increases the angle of twist significantly as compared with reference beam for the same applied torque level.
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Xu, Yiqing, and Guoquan Zhou. "Circular Lorentz–Gauss beams." Journal of the Optical Society of America A 36, no. 2 (January 14, 2019): 179. http://dx.doi.org/10.1364/josaa.36.000179.

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Hieu, Nguyen Tran. "Simplified design method and parametric study of composite cellular beam." Journal of Science and Technology in Civil Engineering (STCE) - NUCE 12, no. 3 (April 30, 2018): 34–43. http://dx.doi.org/10.31814/stce.nuce2018-12(3)-04.

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Nowadays, with the development of cutting and welding technologies, steel beams with regular circular openings, called cellular beams, have been widely used for construction. The cellular beams could be designed either as steel beam or composite beam when headed shear connectors connect concrete slab to top flange of steel beam. This paper presents a procedure to design cellular composite beams according to EN 1994-1-1. In addition, a parametric study is carried out to evaluate the influence of circular opening geometry to ultimate load and failure mode of a series of cellular composite beams. As a result, an optimal dimension of cellular beam is proposed. Article history: Received 28 February 2018, Revised 22 March 2018, Accepted 27 April 2018
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Baxy, Ajinkya, and Abhijit Sarkar. "Free vibrations of circular curved beams." MATEC Web of Conferences 211 (2018): 04006. http://dx.doi.org/10.1051/matecconf/201821104006.

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The study of free vibrations of curved beams has relevance in engineering applications like modeling turbo machinery blades, propellers, arch design, etc. Vibration characteristics of structures are generally evaluated using the Finite Element Method. The governing equations for the curved beam using the inextensional theory are available in the literature. These equations are solved analytically for two different boundary conditions, namely (a) simplysupported, (b) cantilever. The results obtained for all the cases are compared against the FEM simulation results. It is found that the present solutions are in agreement with the FEM solutions up to an opening angle of 40°.
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Pydah, Anup, and Aditya Sabale. "Closed-form exact solutions for thick bi-directional functionally graded circular beams." Multidiscipline Modeling in Materials and Structures 15, no. 1 (January 7, 2019): 79–102. http://dx.doi.org/10.1108/mmms-12-2017-0156.

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PurposeThere exists a clear paucity of models for curved bi-directional functionally graded (BDFG) beams wherein the material properties vary along the axis and thickness of the beam simultaneously; such structures may help fulfil practical design requirements of the future and improve structural efficiency. In this context, the purpose of this paper is to extend the analytical model developed earlier to thick BDFG circular beams by using first-order shear deformation theory which allows for a non-zero shear strain distribution through the thickness of the beam.Design/methodology/approachSmooth functional variations of the material properties have been assumed along the axis and thickness of the beam simultaneously. The governing equations developed have been solved analytically for some representative determinate circular beams. In order to ascertain the effects of shear deformation in these structures, the total strain energy has been decomposed into its bending and shear components and the effects of the beam thickness and the arch angle on the shear energy component have been studied.FindingsClosed-form exact solutions involving through-the-thickness integrals carried out numerically are presented for the bending of circular beams under the action of a variety of concentrated/distributed loads.Originality/valueThe results clearly indicate the importance of capturing shear deformation in thick BDFG beams and demonstrate the capability of tuning the response of these beams to fit a wide variety of structural requirements.
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Huang, T. W., C. T. Zhou, and X. T. He. "Self-shaping of a relativistic elliptically Gaussian laser beam in underdense plasmas." Laser and Particle Beams 33, no. 2 (April 28, 2015): 347–53. http://dx.doi.org/10.1017/s026303461500018x.

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AbstractSelf-shaping and propagation of intense laser beams of different radial profiles in plasmas is investigated. It is shown that when a relativistic elliptically Gaussian beam propagates through an underdense plasma, its radial profile will self-organize into a circularly symmetric self-similar smooth configuration. Such self-similar propagation can be attributed to a soliton-like structure of the laser pulse. The anisotropic electron distribution results in a circular electric field that redistributes the electrons and modulates the laser pulse to a circular radial shape.
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Safdar, Shakeel, Lin Li, M. A. Sheikh, and Zhu Liu. "An Analysis of the Effect of Laser Beam Geometry on Laser Transformation Hardening." Journal of Manufacturing Science and Engineering 128, no. 3 (December 6, 2005): 659–67. http://dx.doi.org/10.1115/1.2193547.

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The effect of transformation hardening depends upon both heating and cooling rates. It is desirable to have a slow heating rate and a rapid cooling rate to achieve full transformation. To date laser transformation hardening has been carried out using circular or rectangular beams which result in rapid heating and cooling. Although the use of different beam intensity distributions within the circular or rectangular laser beams has been studied to improve the process, no other beam geometries have been investigated so far for transformation hardening. This paper presents an investigation into the effects of different laser beam geometries in transformation hardening. Finite element modeling technique has been used to simulate the steady state and transient effects of moving beams in transformation hardening of EN 43A steel. The results are compared with experimental data. The work shows that neither of the two commonly used beams, circular and rectangular, are optimum beam shapes for transformation hardening. The homogenization temperature exceeds the melting point for these beam shapes for the usual laser scanning speeds and power density. Triangular beam geometry has been shown to produce the best thermal history to achieve better transformation and highest hardness due to slower heating without sacrificing the processing rate and hardening depths.
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Ni, Yongzhou, Yimin Zhou, Guoquan Zhou, and Ruipin Chen. "Characteristics of Partially Coherent Circular Flattened Gaussian Vortex Beams in Turbulent Biological Tissues." Applied Sciences 9, no. 5 (March 7, 2019): 969. http://dx.doi.org/10.3390/app9050969.

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The characteristics of partially coherent circular flattened Gaussian vortex beams in turbulent biological tissues are investigated, and the analytical formula for the cross-spectral density of this beam is derived. According to the cross-spectral density matrix, the average intensity and degree of polarization can be obtained. By numerical simulation, the distributions of the normalized average intensity and degree of polarization of partially coherent circular flattened Gaussian vortex beams are demonstrated on the research plane of turbulent biological tissues. The effects of the two beam parameters, the topological charge, the two transverse coherent lengths, and the structural constant of biological turbulence on the normalized average intensity and degree of polarization are analyzed. This study is of great significance for the potential application of partially coherent circular flattened Gaussian vortex beams in medical imaging and medical diagnosis.
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Dissertations / Theses on the topic "Circular Beams"

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Babamohammadi, Sajjad. "Mechanical Assessment of Fiber Reinforced Composite Hollow Circular Beams." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019.

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This thesis presents a study on fiber reinforced hollow beams. The theoretical background is based on published works and some extensions to the present researches. For some, simple, cases exact solutions are made available, however hollow composite beams have to be studied using 3D modeling in order to capture their actual anisotropic behavior. At first, we start to investigate if we have enough information to successfully design a structure using FRP materials. Then after studying some published works in this field, we understood that there is a lack of some important details. We tried to fill this void by first understanding the behavior of FRP beams and prepare a fast and easy way for engineers to use these composite beams and design structures. To do that, we used existing analytical methods. Although analytical, these methods are limited for studying fiber reinforced beams. Thus, a new approach is here presented based on an equivalent 3D shell model which is used to defined a 3D finite element beam element for frame structural analysis. This approach is simple and clearly considers the anisotropy inherited in such profiles. Applications of this procedure are given which show the quality of the present results and the advantages of using composite beams with respect to classical steel beams in civil applications.
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Lumpp, Dirk Manfred. "An experimental investigation of circular plates, beams and stiffened circular plates subjected to impulsive loading." Master's thesis, University of Cape Town, 1991. http://hdl.handle.net/11427/9658.

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Bibliography: leaves 94-96.
This primarily experimental investigation describes a series of experiments on fully-clamped circular plates, rectangular beams and stiffened circular plates. These test specimens were subjected to a uniformly distributed impulse. The impulse was provided by plastic explosive. This was arranged in such a way that a uniformly distributed impulse was imparted to the test specimens. The impulse was measured by means of a ballistic pendulum to which the test specimens were attached. The final mid-point deflections of the plates and beams were measured. The plate and beam results were compared to previous experimental work. A non-dimensional number for plates was modified to include an experimental mass scaling factor due to the ballistic pendulum mass. A non-dimensional number for rectangular beams was developed, including a similar experimental mass scaling factor. Comparing the beam and plate results from this study with those of previous work, using the respective non-dimensional numbers, showed good correlation. The results for the stiffened plates are compared with the plate results.
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Muluh, Esau Ticha. "Analysis of deformation and tearing of uniformly blast-loaded circular and square plates rectangular beams and T-beams." Master's thesis, University of Cape Town, 2001. http://hdl.handle.net/11427/5500.

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Includes bibliography.
This investigation examines the failure of circular and square mild steel plates, aluminium rectangular beams and T-beams subjected to impulsive loads. The objective of this investigation is to numerically determine the dynamic response of circular and square plates, rectangular beams and T-beams clamped and built-in (integral) at the boundary subjected to uniform blast loading; use material properties that include and exclude temperature dependency to model the plates and beams response and failure and finally to compare the numerical results with experimental results.
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Lawry, James Milson Hassall. "Complex ray theory." Thesis, University of Oxford, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.389022.

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Zhao, H., R. Wang, Dennis Lam, C.-C. Hou, and R. Zhang. "Behaviours of circular CFDST with stainless steel external tube: Slender columns and beams." Elsevier, 2020. http://hdl.handle.net/10454/18141.

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No
In this work, experimental and numerical investigations were performed on the behaviours of circular concrete filled double steel tubular (CFDST) slender columns and beams, in which the external tube employed stainless steel tube. Eighteen specimens, 12 slender columns and 6 beams, were tested to obtain the failure patterns, load versus deflection relationships and strain developments of stainless steel tube. A finite element (FE) model was developed and verified by experimental results. The validated FE model was then employed to investigate the effects of key parameters, including hollow ratio, eccentric ratio and material strength, on the load-carrying capacity. The load distribution among the components and contact stress between steel tube and sandwiched concrete were also analyzed. Finally, the design methods for CFDST, hollow CFST and solid CFST members with carbon steel external tube respectively suggested by Han et al. (2018), Chinese GB 50936-2014 (2014) and AISC 360-16 (2016) were employed to evaluate their applicability for the circular CFDST slender columns and beams with stainless steel outer tube.
The authors gratefully acknowledge the Shanxi Province Outstanding Youth Fund (No. 201701D211006) and the National Natural Science Foundation (No. 51838008).
The full-text of this article will be released for public view at the end of the publisher embargo on 9th Nov 2021.
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Too, Gee-Pinn James. "Analytical and numerical approaches for finite amplitude sound beams radiated from a circular baffled piston." Diss., Georgia Institute of Technology, 1991. http://hdl.handle.net/1853/16917.

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Alameer, Maryam. "Polarization Dependent Ablation of Diamond with Gaussian and Orbital Angular Momentum Laser Beams." Thesis, Université d'Ottawa / University of Ottawa, 2019. http://hdl.handle.net/10393/39850.

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The vectorial nature (polarization) of light plays a significant role in light-matter interaction that leads to a variety of optical devices. The polarization property of light has been exploited in imaging, metrology, data storage, optical communication and also extended to biological studies. Most of the past studies fully explored and dealt with the conventional polarization state of light that has spatially symmetric electrical field geometry such as linear and circular polarization. Recently, researchers have been attracted to light whose electric field vector varies in space, the so-called optical vector vortex beam (VVB). Such light is expected to further enhance and improve the efficiency of optical systems. For instance, a radially polarized light under focusing condition is capable of a tighter focus more than the general optical beams with a uniform polarization structure, which improves the resolution of the imaging system [1]. Interaction of ultrafast laser pulses with matter leads to numerous applications in material processing and biology for imaging and generation of microfluidic systems. A femtosecond pulse, with very high intensities of (10^{12} - 10^{13} W/cm^2), has the potential to trigger a phenomenon of optical breakdown at the surface and therefore induce permanent material modification. With such high intensities and taking into account the fact that most materials possess large bandgap, the interaction is completely nonlinear in nature, and the target material can be modified locally upon the surface and even further in bulk. The phenomenon of optical breakdown can be further investigated by studying the nonlinear absorption. Properties like very short pulse duration and the high irradiance of ultrashort laser pulse lead to more precise results during the laser ablation process over the long pulsed laser. The duration of femtosecond laser pulse provides a high resolution for material processing because of the significant low heat-affected zone (HAZ) beyond the desired interaction spot generated upon irradiating the material. Under certain condition, the interaction of intense ultrashort light pulses with the material gives rise to the generation of periodic surface structures with a sub-micron periodicity, i.e., much smaller than the laser wavelength. The self-oriented periodic surface structures generated by irradiating the material with multiple femtosecond laser pulses results in improving the functionality of the material's surface such as controlling wettability, improving thin film adhesion, and minimizing friction losses in automobile engines, consequently, influences positively on many implementations. In this work, we introduced a new method to study complex polarization states of light by imprinting them on a solid surface in the form of periodic nano-structures. Micro/Nanostructuring of diamond by ultrafast pulses is of extreme importance because of its potential applications in photonics and other related fields. We investigated periodic surface structures usually known as laser-induced periodic surface structures (LIPSS) formed by Gaussian beam as well as with structured light carrying orbital angular momentum (OAM), generated by a birefringent optical device called a q-plate (QP). We generated conventional nano-structures on diamond surface using linearly and circularly polarized Gaussian lights at different number of pulses and variable pulse energies. In addition, imprinting the complex polarization state of different orders of optical vector vortex beams on a solid surface was fulfilled in the form of periodic structures oriented parallel to the local electric field of optical light. We also produced a variety of unconventional surface structures by superimposing a Gaussian beam with a vector vortex beam or by superposition of different order vector vortex beams. This thesis is divided into five chapters, giving a brief description about laser-matter interaction, underlying the unique characterization of femtosecond laser over the longer pulse laser and mechanisms of material ablation under the irradiation of fs laser pulse. This chapter also presents some earlier studies reported in formation of (LIPSS) fabricated on diamond with Gaussian. The second chapter explains the properties of twisted light possessing orbital angular momentum in its wavefront, a few techniques used for OAM generation including a full explanation of the q-plate from the fabrication to the function of the q-plate, and the tool utilized to represent the polarization state of light (SoP), a Poincar'e sphere. Finally, the experimental details and results are discussed in the third and fourth chapters, respectively, following with a conclusion chapter that briefly summarizes the thesis and some potential application of our findings.
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Fariborz, Jamshid. "Free Vibration of Bi-directional Functionally Graded Material Circular Beams using Shear Deformation Theory employing Logarithmic Function of Radius." Thesis, Virginia Tech, 2018. http://hdl.handle.net/10919/85107.

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Curved beams such as arches find ubiquitous applications in civil, mechanical and aerospace engineering, e.g., stiffened floors, fuselage, railway compartments, and wind turbine blades. The analysis of free vibrations of curved structures plays a critical role in their design to avoid transient loads with dominant frequencies close to their natural frequencies. One way to increase their areas of applications and possibly make them lighter without sacrificing strength is to make them of Functionally Graded Materials (FGMs) that are composites with continuously varying material properties in one or more directions. In this thesis, we study free vibrations of FGM circular beams by using a logarithmic shear deformation theory that incorporates through-the-thickness logarithmic variation of the circumferential displacement, and does not require a shear correction factor. The radial displacement of a point is assumed to depend only upon its angular position. Thus the beam theory can be regarded as a generalization of the Timoshenko beam theory. Equations governing transient deformations of the beam are derived by using Hamilton's principle. Assuming a time harmonic variation of the displacements, and by utilizing the generalized differential quadrature method (GDQM) the free vibration problem is reduced to solving an algebraic eigenvalue problem whose solution provides frequencies and the corresponding mode shapes. Results are presented for different spatial variations of the material properties, boundary conditions, and the aspect ratio. It is found that the radial and the circumferential gradation of material properties maintains their natural frequency within that of the homogeneous beam comprised of a constituent of the FGM beam. Furthermore, keeping every other variable fixed, the change in the beam opening angle results in very close frequencies of the first two modes of vibration, a phenomenon usually called mode transition.
Master of Science
Curved and straight beams of various cross-sections are one of the simplest and most fundamental structural elements that have been extensively studied because of their ubiquitous applications in civil, mechanical, biomedical and aerospace engineering. Many attempts have been made to enhance their material properties and designs for applications in harsh environments and reduce weight. One way of accomplishing this is to combine layerwise two or more distinct materials and take advantage of their directional properties. It results in a lightweight structure having overall specific strength superior to that of its constituents. Another possibility is to have volume fractions of two or more constituents gradually vary throughout the structure for enhancing its performance under anticipated applications. Functionally graded materials (FGMs) are a class of composites whose properties gradually vary along one or more space directions. In this thesis, we have numerically studied free vibrations of FGM circular beams to enhance their application domain and possibly use them for energy harvesting.
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Wellburn, Daniel. "Circular laser beam intensity profile shaping for uniform surface treatments." Thesis, University of Liverpool, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.533912.

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Montanari, Carlo Emilio. "Diffusive approach for non-linear beam dynamics in a circular accelerator." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amslaurea.unibo.it/19289/.

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Nella fase di design e simulazione di un acceleratore circolare, risulta fondamentale avere una buona comprensione del moto betatronico non-lineare delle singole particelle, e di come questo interferisce con la qualità del fascio. In questo lavoro vengono studiati sistemi Hamiltoniani sottoposti a perturbazioni stocastiche tramite un framework diffusivo, basato sull'equazione di Fokker-Planck. Tale studio viene poi applicato all'analisi del moto betatronico non-lineare e al problema dell'Apertura Dinamica. In particolare, vengono impostate le basi per formulare un metodo di interpolazione di processi diffusivi simil-Nekhoroshev e viene proposta una procedura sperimentale per misurare gli effetti di diffusione locale all'interno di un acceleratore. L'Apertura Dinamica è una quantità chiave per il comportamento a lungo termine di un acceleratore, tuttavia, la misura di questa quantità nelle simulazioni presenta serie difficoltà dal punto di vista computazionale. È dunque nel nostro interesse riuscire a formulare una legge che descriva la dipendenza dal tempo dell'Apertura Dinamica.
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Books on the topic "Circular Beams"

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Design analysis of beams, circular plates and cylindral tanks on elastic foundations. 2nd ed. London: Taylor & Francis, 2006.

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Melerski, Edmund S. Design analysis of beams, circular plates and cylindrical tanks on elastic foundations: With IBM-compatible software. Rotterdam: Balkema, 2000.

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I, Koop, Tumaikin G, Institut i͡a︡dernoĭ fiziki SO AN SSSR., and International Committee for Future Accelerators., eds. Third Advanced ICFA Beam Dynamics Workshop on Beam-Beam effects in circular colliders: Akademgorodok, Novosibirsk 29 May-3 June 1989 : proceedings. Novosibirsk: ICFA, 1990.

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Fay, Edgar H. Lunar orbiting microwave beam power system. [Washington, D.C.]: NASA, 1990.

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International Workshop on Particle Dynamics in Accelerators (1994 Tsukuba-shi, Japan). Proceedings of the International Workshop on Particle Dynamics in Accelerators: Emittance in circular accelerators : 21-26 November 1994, Tsukuba, Japan. Tsukuba-shi, Ibaraki-ken, Japan: National Laboratory for High Energy Physics, 1995.

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Melerski, Edmund. Design Analysis Beams Circular Plates and Cylindrical Tanks on Elastic Foundations. Taylor & Francis, 2000.

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Melerski, Edmund S. Design analysis of beams, circular plates and cylindrical tanks on elastic foundations. Taylor & Francis, 2000.

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Melerski, Edmund. Design Analysis of Beams, Circular Plates and Cylindrical Tanks on Elastic Foundations, Second Edition. Taylor & Francis, 2006.

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Circularly Polarized Antennas. John Wiley & Sons Inc, 2014.

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Book chapters on the topic "Circular Beams"

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Vinson, Jack R. "Circular Plates." In The Behavior of Thin Walled Structures: Beams, Plates, and Shells, 70–85. Dordrecht: Springer Netherlands, 1989. http://dx.doi.org/10.1007/978-94-009-2774-2_6.

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Babu, J., B. Ramesh Reddy, J. Doondi Kumar, N. Siva Govind, and Baji Babu Mutte. "Shaped Beams from Circular Aperture Antennas." In Lecture Notes in Electrical Engineering, 169–78. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-15-8439-8_15.

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Eslami, M. Reza. "Buckling of Circular Cylindrical Shells." In Buckling and Postbuckling of Beams, Plates, and Shells, 381–463. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-62368-9_6.

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Minty, Michiko G., and Frank Zimmermann. "Polarization Issues." In Particle Acceleration and Detection, 239–62. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-662-08581-3_10.

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AbstractThe study of spin dynamics in synchrotrons has evolved over the years as has the desire for achieving polarized particle beams of the highest possible beam energies. A selection of reviews of the dynamics of polarized beams may be found in [1]–[9]. In this chapter, we focus on experimental data and describe spin transport in circular accelerators and transport lines. Except where explicitly mentioned, radiative effects in electron accelerators or very high energy proton accelerators are not treated here. We begin with a review of the Thomas-BMT equation for spin motion. This will be given in terms of the SU(2) spinor representation. Spinor algebra will be introduced and applied in the description of techniques used for preserving the beam polarization during acceleration through depolarizing resonances at moderate beam energies.
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Koch, Christiane P. "Quantum Effects in Cold and Controlled Molecular Dynamics." In Molecular Beams in Physics and Chemistry, 477–90. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-63963-1_21.

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AbstractThis chapter discusses three examples of quantum effects that can be observed in state-of-the-art experiments with molecular beams—scattering resonances as a probe of interparticle interactions in cold collisions, the protection of Fano-Feshbach resonances against decay despite resonant coupling to a scattering continuum, and a circular dichroism in photoelectron angular distributions arising in the photoionization of randomly oriented chiral molecules. The molecular beam setup provides molecules in well-defined quantum states. This, together with a theoretical description based on first principles, allows for excellent agreement between theoretical prediction and experimental observation and thus a rigorous understanding of the observed quantum effects.
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Cuadra-Troncoso, J. M., M. A. Muñoz-Bañón, F. de la Paz-López, and J. R. Álvarez-Sánchez. "Segmentation of Circular Contours from Laser Beams Measurements." In Biomedical Applications Based on Natural and Artificial Computing, 540–50. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-59773-7_55.

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Eslami, M. Reza. "Buckling and Post-buckling of Circular/Annular Plates." In Buckling and Postbuckling of Beams, Plates, and Shells, 279–380. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-62368-9_5.

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Grigorenko, Alexander Ya, Maksym Yu Borysenko, Olena V. Boychuk, and Larisa Ya Vasil’eva. "Free Vibrations of an Open Non-circular Cylindrical Shell of Variable Thickness." In Analysis of Shells, Plates, and Beams, 141–54. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-47491-1_8.

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Minh, Nguyen-Hoang, and Wilfried Becker. "Open Circular Hole in a Finite Plate Under Tension Treated by Airy Stress Function Method." In Analysis of Shells, Plates, and Beams, 311–30. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-47491-1_16.

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Kvedaras, A. K., G. Šaučiuvėnas, and E. Jarmolajeva. "Behaviour of Hollow and Solid Concrete-Filled Circular Steel Tubular Simple Beams." In Design, Fabrication and Economy of Metal Structures, 569–76. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-36691-8_85.

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Conference papers on the topic "Circular Beams"

1

Crosbie, E., and K. Symon. "Injection into a circular machine with a KV distribution." In Space charge dominated beams and applications of high brightness beams. AIP, 1996. http://dx.doi.org/10.1063/1.51077.

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Emory, B. H., and W. D. Zhu. "Experimental Modal Analysis of Rectangular and Circular Beams." In ASME 2003 International Mechanical Engineering Congress and Exposition. ASMEDC, 2003. http://dx.doi.org/10.1115/imece2003-42535.

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Abstract:
Analytical and experimental methods are used to determine the natural frequencies and mode shapes of Aluminum 6061-T651 beams with rectangular and circular cross sections. A unique test stand is developed to provide the rectangular beam with different boundary conditions including clamped-free, clamped-clamped, clamped-pinned, and pinned-pinned. The first 10 bending frequencies and mode shapes for each set of boundary conditions are measured. The effects of the bolt torque on the measured frequencies of the rectangular beam are examined. The material properties of the circular beam, including the elastic modulus, shear modulus, and Poisson’s ratio, are determined by measuring its first 20 natural frequencies. A new technique is used to mount an accelerometer to measure the torsional modes of the circular beam. A roving hammer test is conducted to measure the first 10 mode shapes. The measured mode shapes of the circular and rectangular beams are compared with their thoretical predictions using the modal assurance criterion. The Timoshenko beam theory is shown to provide better predictions of the natural frequencies for the higher modes of the circular beam than the Bernoulli-Euler beam theory. The use of the rectangular and circular beam test stands as a teaching tool for undergraduate and graduate students is discussed.
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Rees, G. H. "Space charge tune shift, fast resonance traversal, and current limits in circular accelerators." In Space charge dominated beams and applications of high brightness beams. AIP, 1996. http://dx.doi.org/10.1063/1.51095.

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Shutova, Mariia, Aleksandr Goltsov, Anatoli Morozov, and Alexei V. Sokolov. "Simple Circular Beam Lattices via Phase Modulated Bessel Beams." In Frontiers in Optics. Washington, D.C.: OSA, 2018. http://dx.doi.org/10.1364/fio.2018.jw3a.17.

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Žula, Tomaž, and Stojan Kravanja. "Sustainability Profit Generated by the Optimization of Continuous Beams." In International Conference on Technologies & Business Models for Circular Economy. University of Maribor, University Press, 2020. http://dx.doi.org/10.18690/978-961-286-353-1.12.

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GRAMOLL, KURT, and SRINIVASAN RAMAPRASAD. "NON-CIRCULAR beams on elastic foundatIONS." In 34th Structures, Structural Dynamics and Materials Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1993. http://dx.doi.org/10.2514/6.1993-1447.

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Machida, Shinji. "Space-charge effects in circular accelerators." In HIGH QUALITY BEAMS: Joint US-CERN-JAPAN-RUSSIA Accelerator School. AIP, 2001. http://dx.doi.org/10.1063/1.1420426.

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Mathis, A., F. Courvoisier, L. Froehly, R. Giust, L. Furfaro, M. Jacquot, and J. M. Dudley. "Nonparaxial circular and weber beams from caustics." In 2013 Conference on Lasers & Electro-Optics Europe & International Quantum Electronics Conference CLEO EUROPE/IQEC. IEEE, 2013. http://dx.doi.org/10.1109/cleoe-iqec.2013.6801530.

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Luu, Anh-Tuan, Nam-Il Kim, and Jaehong Lee. "Isogeometric Analysis of Non-Circular Curved Beams." In 10th Pacific Structural Steel Conference (PSSC 2013). Singapore: Research Publishing Services, 2013. http://dx.doi.org/10.3850/978-981-07-7137-9_129.

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Žula, Tomaž, and Stojan Kravanja. "Optimization of the sustainability profit generated by the production of beams." In 1st International Conference on Technologies & Business Models for Circular Economy. Univerzitetna založba Univerze v Mariboru / University of Maribor Press, 2018. http://dx.doi.org/10.18690/978-961-286-211-4.12.

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Reports on the topic "Circular Beams"

1

Wei, Jie, Xiao-Ping Li, and Andrew M. Sessler. Crystalline Beams in Circular Accelerators. Office of Scientific and Technical Information (OSTI), January 1995. http://dx.doi.org/10.2172/1119449.

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Ohmi, K. Study of the beam-beam limit in e+e- circular colliders. Office of Scientific and Technical Information (OSTI), April 2004. http://dx.doi.org/10.2172/826860.

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Chao, Alex W. COMBINED PHENOMENA OF BEAM-BEAM AND BEAM ELECTRON CLOUDEFFECTS IN CIRCULAR E+ E- COLLIDERS. Office of Scientific and Technical Information (OSTI), August 2002. http://dx.doi.org/10.2172/800086.

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Mastoridis, Themistoklis. Radio Frequency Station - Beam Dynamics Interaction in Circular Accelerators. Office of Scientific and Technical Information (OSTI), August 2010. http://dx.doi.org/10.2172/1007546.

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Sen, Tanaji. Optical diffraction radiation from a beam off a circular target. Office of Scientific and Technical Information (OSTI), April 2008. http://dx.doi.org/10.2172/928515.

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Lee, M. Throbbing Beam Transverse Resistive Instabilities in Circular Accelerators and Storage Rings. Office of Scientific and Technical Information (OSTI), June 2018. http://dx.doi.org/10.2172/1453855.

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Katsouleas, Thomas, and Viktor Decyk. Collaborative Research: Simulation of Beam-Electron Cloud Interactions in Circular Accelerators Using Plasma Models. Office of Scientific and Technical Information (OSTI), October 2009. http://dx.doi.org/10.2172/1098264.

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Avitzur, Boaz. Shear Deflection in a Three-Point Bend Beam of a Solid Circular Cross-Section. Fort Belvoir, VA: Defense Technical Information Center, March 1985. http://dx.doi.org/10.21236/ada154458.

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Kabel, Andreas C. Quantum Ground State and Minimum Emittance of a Fermionic Particle Beam in a Circular Accelerator. Office of Scientific and Technical Information (OSTI), February 2001. http://dx.doi.org/10.2172/784868.

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Gohar, M. Y. A., T. Sofu, Z. Zhong, H. Belch, and D. Naberezhnev. Target design optimization for an electron accelerator driven subcritical facility with circular and square beam profiles. Office of Scientific and Technical Information (OSTI), October 2008. http://dx.doi.org/10.2172/946031.

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