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Journal articles on the topic 'Energy beam'

Author: Grafiati

Published: 7 June 2025

Last updated: 2 August 2025

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1

Rahman, M. A., M. Jahangir Alam, and M. Akhtaruzzaman. "Characteristics Analysis of High Energy External Radiotherapy Beams in Water." Malaysian Journal of Medical and Biological Research 5, no. 1 (2018): 51–60. http://dx.doi.org/10.18034/mjmbr.v5i1.450.

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High energy external radiotherapy beam is being used widely for cancer treatment. Biological effect of radiation is concerned with the evaluation of energy absorbed in the tissue. The study of photon and electron beam characteristics is necessary before calibration machine. The aim of this study was to analysis characteristics of depth dose of different energy beams in water to enhance the quality of the radiotherapy treatment planning. Beam is attenuated by the medium and the transmitted beam with less intensity causes lesser absorbed dose as the depth increases. Relative attenuation on certa

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Maradia, Vivek, David Meer, Damian C. Weber, Antony J. Lomax, and Serena Psoroulas. "A novel intensity compensation method to achieve energy independent beam intensity at the patient location for cyclotron based proton therapy facilities." Journal of Physics: Conference Series 2420, no. 1 (2023): 012106. http://dx.doi.org/10.1088/1742-6596/2420/1/012106.

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Abstract In cyclotron-based proton therapy facilities, an energy selection system is typically used to lower the beam energy from the fixed value provided by the accelerator (250/230 MeV) to the one needed for the treatment (230-70 MeV). Such a system has the drawback of increase beam emittance and introducing an energy-dependent beam current at the patient location, resulting in energy dependent beam intensity ratios of about 103 between high and low energies. This complicates treatment delivery and challenges patient safety systems. As such, we propose the use of a dual energy degrader metho

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3

Park, Young-Ho, and Suk-Yoon Hong. "Vibrational Energy Flow Analysis of Corrected Flexural Waves in Timoshenko Beam – Part I: Theory of an Energetic Model." Shock and Vibration 13, no. 3 (2006): 137–65. http://dx.doi.org/10.1155/2006/308715.

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In this paper, an energy flow model is developed to analyze transverse vibration including the effects of rotatory inertia as well as shear distortion, which are very important in the Timoshenko beam transversely vibrating in the medium-to-high frequency ranges. The energy governing equations for this energy flow model are newly derived by using classical displacement solutions of the flexural motion for the Timoshenko beam, in detail. The derived energy governing equations are in the general form incorporating not only the Euler-Bernoulli beam theory used for the conventional energy flow mode

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4

Zhong, Xiang, Buyi Wang, Rong Li, Yimin Wu, Mengchao Ma, and Huaxia Deng. "Energy conversion mechanisms of a seesaw-type energy harvester." Journal of Physics D: Applied Physics 55, no. 25 (2022): 255002. http://dx.doi.org/10.1088/1361-6463/ac5941.

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Abstract Vibration energy harvesters with bistable characteristics, which can convert mechanical energy to electric energy, are typically cantilever beams with magnetic repulsion. In order to enhance their low-frequency performance, a seesaw-type approach has been proposed, which can make the structure overcome the potential barrier more easily. In this paper, we establish electromechanical coupling equations of the whole system, and prove that the internal beam delivers mechanical energy to the primary beam based on time-domain analysis. Meanwhile, frequency-domain analysis and solutions are

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Ma, Gao, Liang Huang, Libo Yan, Hui Wang, and Peng Yin. "Flexural and Thermal Properties of Novel Energy Conservation Slotted Reinforced Concrete Beams." Advances in Materials Science and Engineering 2016 (2016): 1–14. http://dx.doi.org/10.1155/2016/4642810.

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Conventional solid reinforced concrete (RC) beams were modified to slotted beams for consideration as thermal insulation structural components. The slotted beam consisted of an outer and an inner beam, respectively, with a slot located near the middle of the beam along its width direction for filling thermal insulation material. Flexural and thermal behavior of the slotted beams were investigated. Three RC reference solid beams and six slotted beams were fabricated and tested under four-point bending tests. The test results indicated that the failure mode of both slotted beams and the solid be

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Egorov, Y. A., and A. F. Rubass. "Spin-orbit interaction in quasi-monochromatic singular beams." Computer Optics 48, no. 1 (2024): 18–25. http://dx.doi.org/10.18287/2412-6179-co-1318.

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It is shown that the magnitude of the spin-orbit coupling is the energy efficiency of energy transfer between orthogonally polarized beam components. The energy efficiency changes as the Gaussian beam propagates through the anisotropic crystal. For a fundamental Gaussian beam, the energy efficiency cannot exceed 50%, and for elegant Hermite-Gaussian and Laguerre-Gaussian beams of higher orders, the energy efficiency can reach a value close to 100%. At the same time, for ordinary higher-order Hermite-Gaussian and Laguerre-Gaussian mode beams, the energy efficiency can only slightly exceed 50%.

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7

Lashlem, A. A., Dzuraidah Abd Wahab, Shahrum Abdullah, and Che Hassan Che Haron. "Impact Performance of Low Carbon Steel Safety Beams for Car Doors." Applied Mechanics and Materials 165 (April 2012): 247–51. http://dx.doi.org/10.4028/www.scientific.net/amm.165.247.

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This paper presents impact behaviour and energy absorption response of car door safety beams. Low carbon steel of thickness 2.25 mm, designed into four different shapes of, tube-beam, I-beam and II-beam were used in this experiment to study the effect of impact load on the crash characteristic of the door beams in terms of load bearing and attenuation of energy. The tube-beam is the conventional beam commonly used in cars today. The reason propelling the investigation of other beams is to draw a parallel comparison with the conventional tube beam and possibly obtain an optimised design in term

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8

Schliessmann, F., M. Arnold, A. Brauch, et al. "Studies on a Triple-Turn Energy-Recovery Mode at the S-DALINAC." Journal of Physics: Conference Series 2687, no. 3 (2024): 032023. http://dx.doi.org/10.1088/1742-6596/2687/3/032023.

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Abstract The electron accelerator S-DALINAC at TU Darmstadt was successfully operated in single- and double-turn energy-recovery mode. The latter was realized using a shared beam-transport where two beams are superimposed in the first recirculation beamline. Due to its current design, the S-DALINAC can be upgraded with reasonable effort to be operated in triple-turn energy-recovery mode with shared beam-transport. Here, two beams are superimposed in both the first and the second recirculation beamline. This mode is particularly challenging since it does not allow for on-the-fly beam tuning com

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9

XING, Yitao. "Vibration analysis of functionally graded saturated porous beams using radiative energy transfer method." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 270, no. 8 (2024): 3807–11. http://dx.doi.org/10.3397/in_2024_3375.

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An energy flow model based on the radiative energy transfer method (RETM) is established for the high-frequency response prediction of finite functionally graded saturated porous beams. The Timoshenko beam theory and the Biot thoery are applied to derive the motion governing equations of the beam. The response of the beam loaded by a high-frequency point force is described by vibrational energy density and intensity. The energy response of the beam is contributed by the rays emitted from the actual source set at load point and then reflected through the fictitious sources at the boundaries. Fi

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10

Shen, Z., L. T. Sun, Z. H. Jia, X. Fang, C. Qian, and H. W. Zhao. "Space Charge Compensation Study of High Intensity Ion Beams." Journal of Physics: Conference Series 2244, no. 1 (2022): 012090. http://dx.doi.org/10.1088/1742-6596/2244/1/012090.

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Abstract The space charge effect is one of the key factors affecting ion beam transport and ion beam quality, especially for low-energy high-intensity ion beams. It can be partially compensated by the secondary electrons produced from the ionization of residual gas molecules in the beam pipe, and we are interested in the accurate value of this compensation degree. In this paper, we use a Three-grid Energy Analyzer (TEA) to measure the secondary ion energy distribution of the beam, which corresponds to the compensated beam potential distribution. To have accurate evaluation of the compensation

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11

Lu, Ze-Qi, Fei-Yang Zhang, Hai-Ling Fu, Hu Ding, and Li-Qun Chen. "Rotational nonlinear double-beam energy harvesting." Smart Materials and Structures 31, no. 2 (2021): 025020. http://dx.doi.org/10.1088/1361-665x/ac4579.

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Abstract This paper presents an investigation of the performance of a coupled rotational double-beam energy harvester (DBEH) with magnetic nonlinearity. Two spring-connected cantilever beams are fixed on a rotating disc. Repelling magnets are attached to the frame and to the lower beam tip, and an equal-mass block is attached to the tip of the upper beam. To describe the dynamic response, a theoretical model related to the rotational motion of the coupled cantilever beam is derived from the Lagrange equations. In addition, the harmonic balance method, together with the arc-length continuation

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Krishnagopal, S., and R. Siemann. "Beam-energy inequality in the beam-beam interaction." Physical Review D 41, no. 5 (1990): 1741–43. http://dx.doi.org/10.1103/physrevd.41.1741.

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Benali, A., G. Medkour Ishak-Boushaki, J. Riffaud, and A. M. Nourreddine. "Geometrical effects on luminescent dosimeter energy response." Journal of Instrumentation 17, no. 01 (2022): P01035. http://dx.doi.org/10.1088/1748-0221/17/01/p01035.

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Abstract Luminescent dosimeters are widely used in medical applications. For an optimal use of these dosimeters, comparative studies of their characteristics, under clinical radiations, are very useful. The purpose of this study is to establish the effect of dosimeter geometry on the luminescent dosimeter energy response for different clinical radiation beams. Monte Carlo simulations were used to calculate the energy response of three kinds of non-commercialized luminescent dosimeters. The dosimeters are: a) radiophotoluminescent glass dosimeter (RPLGD, typeFD-7 glass), b) thermoluminescent do

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Li, H. P., H. Q. Su, Y. Q. Chen, et al. "Beam dynamic design and study of a linac with variable output energy for an AB-BNCT facility." Journal of Instrumentation 18, no. 07 (2023): P07032. http://dx.doi.org/10.1088/1748-0221/18/07/p07032.

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Abstract The Accelerator-based Boron Neutron Capture Therapy (AB-BNCT) is being established worldwide as a future modality to start an era of in-hospital facilities. The most popular reaction for AB-BNCT is 7Li(p, n)7Be and high-flux neutron beams can be produced by bombarding lithium targets with low-energy proton beams. We chose the combined acceleration structure of Radio Frequency Quadrupole linac (RFQ) and Cross-bar H-mode DTL (CH-DTL) considering the compactness of the structure and the adjustment of output energy. The CW proton beam could be accelerated to 1.8 MeV by one RFQ cavity, and

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15

Jing, Li, Jiu Hui Wu, Dong Guan, Mingming Hou, Lu Kuan, and Li Shen. "Effective parameters in beam acoustic metamaterials based on energy band structures." Modern Physics Letters B 30, no. 18 (2016): 1650224. http://dx.doi.org/10.1142/s0217984916502249.

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We present a method to calculate the effective material parameters of beam acoustic metamaterials. The effective material parameters of a periodic beam are calculated as an example. The dispersion relations and energy band structures of this beam are calculated. Subsequently, the effective material parameters of the beam are investigated by using the energy band structures. Then, the modal analysis and transmission properties of the beams with finite cells are simulated in order to confirm the correctness of effective approximation. The results show that the periodic beam can be equivalent to

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16

Ter-Avetisyan, S., M. Schnürer, R. Polster, P. V. Nickles, and W. Sandner. "First demonstration of collimation and monochromatisation of a laser accelerated proton burst." Laser and Particle Beams 26, no. 4 (2008): 637–42. http://dx.doi.org/10.1017/s0263034608000712.

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AbstractLaser produced ion beams have a large divergence angle and a wide energy spread. To our knowledge, this is the first demonstration of collimation and monochromatisation of laser accelerated proton beams, using a permanent quadrupole magnet lens system. It acts as a tunable band pass filter by collimating or focusing the protons with the same energy. Because it gathers nearly the whole proton emission, a strong enhancement of the beam density appears. For the collimated beam, an increase of the proton density in the (3.7 ± 0.3) MeV energy band up to a factor of ~30, from possible 40, re

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17

Liu, Donghuan, Mohammed Al-Haik, Mohamed Zakaria, and Muhammad R. Hajj. "Piezoelectric energy harvesting using L-shaped structures." Journal of Intelligent Material Systems and Structures 29, no. 6 (2017): 1206–15. http://dx.doi.org/10.1177/1045389x17730926.

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Energy harvesting from an L-shaped structure, formed by two beams and corner and end masses, is investigated with the objective of expanding the bandwidth of the frequency range over which energy can be harvested. The structure is excited in a direction that yields the most uniform strain distribution along its main beam. The length of the auxiliary beam is varied to determine its effect on the level and breadth of the frequency range over which energy can be harvested. Results from experiments having different geometries are presented and discussed. It is determined that the frequency range o

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18

Fairuz, Wan Nabila Mohd, Illani Mohd Nawi, Mohamad Radzi Ahmad, and Ramani Kannan. "Design analysis and simulation of serpentine-shaped piezoelectric cantilever beam for pipeline vibration-based energy harvester." AIMS Energy 12, no. 3 (2024): 561–99. http://dx.doi.org/10.3934/energy.2024027.

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<abstract> <p>This study investigated the design and simulation of a novel serpentine-shaped piezoelectric cantilever beam to harness pipeline vibration energy. As the demand for sustainable energy sources increases, harvesting piezoelectric energy from environmental vibrations offers an attractive way to use low-power devices. The purpose of the proposed serpentine configuration is to improve energy dissipation efficiency by maximizing the piezoelectric material exposure to dynamic mechanical stress caused by pipeline vibration. The design process included finite element analysis

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19

Ari-Izumi, Takashi, Ioana Gheorghe, Dan Filipescu, Satoshi Hashimoto, Shuji Miyamoto та Hiroaki Utsunomiya. "Spatial profiles of collimated laser Compton-scattering γ-ray beams". Journal of Instrumentation 18, № 06 (2023): T06005. http://dx.doi.org/10.1088/1748-0221/18/06/t06005.

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Abstract The intensity and energy spatial distributions of collimated laser Compton scattering (LCS) γ-ray beams and of the associated bremsstrahlung beams have been investigated as functions of the electron beam energy, electron beam phase space distribution, laser optics conditions and laser polarization. We show that the beam halo is affected to different extents by variations in the above listed parameters. In the present work, we have used laser Compton scattering simulations performed with the eliLaBr code (https://github.com/dan-mihai-filipescu/eliLaBr) and real LCS and bremsstrahlung γ

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20

Oleshko V.I. and Nguyen V. V. "Investigation of the parameters of a self-focused electron beam outputted behind the anode of a vacuum diode." Technical Physics Letters 48, no. 2 (2022): 47. http://dx.doi.org/10.21883/tpl.2022.02.53580.19053.

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The parameters of a high-current electron beam extracted from the self-focusing zone through a hole in the anode into a vacuum chamber are investigated. The beam parameters were determined from the measurement of the spatial distribution of destruction and glow arising in polymethyl methacrylate samples installed at different distances from the anode (electron beam autographs). The formation of two electron beams --- a self-focused with a high energy density, propagating along the axis of the cone facing the base to the anode with an apex angle of ~ 7o and a high-energy beam of low density, pr

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21

Cheng, Yuan Bin, Ji Hao Chen, Xiao Fei Yin, Wu Qi Zhu, and Hong Gang Zhang. "Competition Model Design of Anti Debris Flow Structure with Pillar Supported." Applied Mechanics and Materials 438-439 (October 2013): 634–38. http://dx.doi.org/10.4028/www.scientific.net/amm.438-439.634.

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A anti debris lash structural competition model of pillar supported house was introduced. Frame structure was adopted in the model and energy conversion beams were built in the hollow floor beams. The upper face of the energy conversion beam was inclined at the support position of the upper column. The energy conversion beam can raise the upper structure when horizontal displacement was produced after collision. Construction details of the model was introduced, structure mechanics analysis and simplified calculation was conducted. By installation of energy conversion beam, the horizontal impac

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Zhang, Liufeng, Xiao Tang, Zhaoye Qin, and Fulei Chu. "Vibro-impact energy harvester for low frequency vibration enhanced by acoustic black hole." Applied Physics Letters 121, no. 1 (2022): 013902. http://dx.doi.org/10.1063/5.0089382.

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In this Letter, we propose an enhanced vibro-impact energy harvester using acoustic black holes (ABHs) for scavenging low-frequency vibration energy. The energy harvester involves two beams: a relatively rigid piezoelectric generating beam with ABH profile and a flexible driving beam with a tip mass mounted at the end. The tip mass and the generating beam collide repeatedly under low-frequency excitations. Experimental studies are conducted to investigate the output performance of the energy harvester by comparing the output power and voltage of generating beams with different tailored ends. F

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23

Yoo, JW, DJ Thompson, and NS Ferguson. "Energy transfer in a beam-framed structure using a modal method and a wave method at mid frequencies." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 232, no. 1 (2016): 79–95. http://dx.doi.org/10.1177/0954406216673396.

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A fully framed system consisting of four beams and a rectangular plate has been investigated in terms of the energy transfer between the beams and the plate when a force is applied to one of the beams. This configuration, which is a mixture of stiff and flexible elements, is a particularly important example in the industrial area, as it is widely used. A modal model based on interface basis functions is used. A wave model, which is an approximate method, has also been developed in which the plate, acting as a wave impedance, is separately attached to each beam. Experimental studies have been c

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Alghamaz, Mohammad, Leila Donyaparastlivari, and Alwathiqbellah Ibrahim. "Dynamic Response and Energy Conversion of Coupled Cantilevers with Dual Piezoelectric–Triboelectric Harvesting Mechanisms." Micromachines 16, no. 2 (2025): 182. https://doi.org/10.3390/mi16020182.

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This study presents a Hybrid Piezoelectric–Triboelectric Energy Harvester (HPTEH) composed of two coupled cantilever beams, designed to enhance energy generation and broaden bandwidth by combining piezoelectric and triboelectric mechanisms. A theoretical 2-DOF lumped model was developed and validated with experimental results, demonstrating good agreement. Experimental findings reveal that Beam I exhibits a softening effect, with resonance frequencies shifting to lower values and increased displacement amplitudes under higher excitation levels due to material nonlinearities and strain-induced

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25

Jomaah, Muyasser M., and Diyaree J. Ghaidan. "Energy Absorption Capacity Of Layered Lightweight Reinforced Concrete Beams With Openings In Web." Civil Engineering Journal 5, no. 3 (2019): 690. http://dx.doi.org/10.28991/cej-2019-03091279.

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This research presents the flexural behavior on reinforced concrete beam with transverse web opening constructed from layered concrete. The layered concrete combining normal concrete and lightweight aggregate concrete (LWC) are depended in present study. In the experimental program, 13 models of normal and layered reinforced concrete beams are tested under the effect of four-point loads. All beams had the same overall geometrical dimensions and main longitudinal top and bottom with internal diagonal reinforcement provided around the openings. One of the beam specimen is tested as control beam

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Podolsky, V., S. Hepner, S. Schipmann, S. Valenteen, R. Thompson, and R. Langtry. "Characterization of a broad beam ion source converted into a high intensity deuterium beam." Journal of Physics: Conference Series 2743, no. 1 (2024): 012075. http://dx.doi.org/10.1088/1742-6596/2743/1/012075.

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Abstract Avalanche Energy is developing deuterium ion beams for the Orbitron fusion device. For these and similar projects, modification of off-the-shelf high current ion sources enables affordable and rapidly accessible alternatives to custom-built systems. We have successfully operated the Veeco MARK I broad beam source on deuterium to create multi-keV energy ions. Directing this beam through a small aperture required carefully designed optics. Once a narrower beam was created, a faraday cup was used to measure the beam current and profile while a Thomson Parabola was developed to help under

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Borowiec, Marek, Arkadiusz Syta, and Grzegorz Litak. "Energy Harvesting Optimizing with a Magnetostrictive Cantilever Beam System." International Journal of Structural Stability and Dynamics 19, no. 05 (2019): 1941002. http://dx.doi.org/10.1142/s0219455419410025.

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Vibration energy is scavenged by a beam system based on magnetostrictive material (MsM). The system consists of interconnected substructural beams (aluminum and magnetostrictive layers) with a neutral stress axis shifted away from the axis of symmetry of the magnetostrictive beam. The coil that generates the electromotive force is wound on the composite beam. The study investigates the effects of a tip mass placed at the end of the beam and the beam thickness influence. Multiple solutions are found for high amplitudes, and the optimal configuration of the operating conditions is proposed. In a

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Kotlyar, V. V., and A. A. Kovalev. "Sinusoidal Gaussian optical vortex as a superposition of two hypergeometric beams." Computer Optics 46, no. 1 (2022): 16–21. http://dx.doi.org/10.18287/2412-6179-co-1008.

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We analyze the propagation of hypergeometric beams with a parabolic initial wavefront in a homogeneous medium. While hypergeomentric beams have a central amplitude singularity in the initial plane and are of infinite energy, superposition of two such beams has no singularity and is of finite energy. A particular case of such a superposition we study in detail is a sinusoidal Gaussian beam with a unit topological charge. This beam belongs to the class of elegant laser beams since it is described by the same complex-argument function both in the initial plane and in the Fresnel diffraction zone.

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Poignant, Floriane, Ianik Plante, Luis Crespo, and Tony Slaba. "Impact of Radiation Quality on Microdosimetry and Chromosome Aberrations for High-Energy (>250 MeV/n) Ions." Life 12, no. 3 (2022): 358. http://dx.doi.org/10.3390/life12030358.

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Studying energy deposition by space radiation at the cellular scale provides insights on health risks to astronauts. Using the Monte Carlo track structure code RITRACKS, and the chromosome aberrations code RITCARD, we performed a modeling study of single-ion energy deposition spectra and chromosome aberrations for high-energy (>250 MeV/n) ion beams with linear energy transfer (LET) varying from 0.22 to 149.2 keV/µm. The calculations were performed using cells irradiated directly by mono-energetic ion beams, and by poly-energetic beams after particle transport in a digital mouse model, repre

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Manik, Josua Timotius, Anisza Okselia, Junios Junios, Angelica Margaretha, and Freddy Haryanto. "Evaluation of 6 MV photon beam characteristics on Varian Clinac iX: a Monte Carlo study." International Journal of Advances in Applied Sciences 14, no. 1 (2025): 227. https://doi.org/10.11591/ijaas.v14.i1.pp227-234.

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This work aims to study the characteristics of photon beams through phase space file (PSF) analysis using Monte Carlo (MC) simulation. 6 MV photon beams from the Varian Clinac iX were simulated using PRIMO software. The beam parameters were validated by evaluating the percentage depth dose and dose profile. A full PSF was scored at the downstream end of the linear accelerator (LINAC) upper and lower parts and analyzed to determine the beam fluence profile, energy fluence profile, angular distribution, and spectral distribution. The results show that within PSF 1, the photon beam has an average

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Egorov, Yuriy, and Alexander Rubass. "Spin-Orbit Coupling in Quasi-Monochromatic Beams." Photonics 10, no. 3 (2023): 305. http://dx.doi.org/10.3390/photonics10030305.

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We investigate the concept that the value of the spin-orbit coupling is the energy efficiency of energy transfer between orthogonal components. The energy efficiency changes as the beam propagates through the crystal. For a fundamental Gaussian beam, its value cannot exceed 50%, while the energy efficiency for Hermite–Gaussian and Laguerre–Gaussian beams of higher orders of the complex argument can reach a value close to 100%. For Hermite–Gauss and Laguerre–Gauss beams of higher orders of real argument, the maximum energy efficiency can only slightly exceed 50%. It is shown that zero-order Bes

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Yin, D. Y., J. Liu, G. D. Shen, et al. "Longitudinal Beam Dynamics for the Heavy-Ion Synchrotron Booster Ring at HIAF." Laser and Particle Beams 2021 (November 20, 2021): 1–9. http://dx.doi.org/10.1155/2021/6665132.

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To accelerate high-intensity heavy-ion beams to high energy in the booster ring (BRing) at the High-Intensity Heavy-Ion Accelerator Facility (HIAF) project, we take the typical reference particle 238U35+, which can be accelerated from an injection energy of 17 MeV/u to the maximal extraction energy of 830 MeV/u, as an example to study the basic processes of longitudinal beam dynamics, including beam capture, acceleration, and bunch merging. The voltage amplitude, the synchronous phase, and the frequency program of the RF system during the operational cycle were given, and the beam properties s

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Reddy Suda, V. B., and S. Priyatham Paul. "Flexural strength of steel fibre reinforced ternary concrete beams." IOP Conference Series: Earth and Environmental Science 982, no. 1 (2022): 012026. http://dx.doi.org/10.1088/1755-1315/982/1/012026.

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Abstract The paper presents an experimental study on the flexural performance of Conventional beam (CB), Ternary beam (TB) and fibrous ternary beam (TBF). Ternary beams are made by using 10% of Micro silica (MS) and 30% of Ground granulated blast furnace slag (GGBS) and Fibrous ternary beams were cast by incorporating crimped steel fibre in four volume fractions i.e. 0.5%, 1%, 1.5% and 2% to the predestined optimum ternary mix, was obtained from preliminary studies. The influence of Supplementary cementing materials (SCMs) and steel fibre on ultimate load, energy absorption, ductility, moment

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Voshchepynets, A., and V. Krasnoselskikh. "Electron beam relaxation in inhomogeneous plasmas." Annales Geophysicae 31, no. 8 (2013): 1379–85. http://dx.doi.org/10.5194/angeo-31-1379-2013.

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Abstract. In this work, we studied the effects of background plasma density fluctuations on the relaxation of electron beams. For the study, we assumed that the level of fluctuations was so high that the majority of Langmuir waves generated as a result of beam-plasma instability were trapped inside density depletions. The system can be considered as a good model for describing beam-plasma interactions in the solar wind. Here we show that due to the effect of wave trapping, beam relaxation slows significantly. As a result, the length of relaxation for the electron beam in such an inhomogeneous

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Chen, Rui-Pin, and Khian-Hooi Chew. "Far-field properties of a vortex Airy beam." Laser and Particle Beams 31, no. 1 (2012): 9–15. http://dx.doi.org/10.1017/s0263034612000729.

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AbstractAnalytical far-field expressions for the transverse electric mode and transverse electric magnetic mode terms, and the energy flux distributions of vortex Airy beams are derived based on the vector angular spectrum of the beam and the stationary phase method. The physical pictures of vortex Airy beams from the vectorial structure are illustrated and the energy flux distributions are demonstrated in far-field. The influences of the beam parameters, especially the exponential factor, on the energy flux distributions of vortex Airy beams and its transverse electric mode and transverse ele

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Li, Yuanqi, and Binhui Huang. "Evaluation on Seismic Performance of Beam-Column Joints of Fabricated Steel Structure with Replaceable Energy-Dissipating Elements." Sustainability 14, no. 6 (2022): 3350. http://dx.doi.org/10.3390/su14063350.

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This research proposes a beam-column hinged joint with additional replaceable energy-dissipating elements, which is highly industrialized and fully fabricated. In this structure, steel beam and steel column are hinged with pins, at which corners a replaceable energy dissipation element is added. The energy dissipation element is rigidly connected to the steel column through a section of H-beam and high-strength bolts and is hinged to the steel beam using high-strength bolts. The main materials, such as energy dissipation elements, steel columns, and steel beams, are all steel with a design yie

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Олешко, В. И., та V. V. Nguyen. "Исследование параметров самосфокусированного электронного пучка, выведенного за анод вакуумного диода". Письма в журнал технической физики 48, № 4 (2022): 3. http://dx.doi.org/10.21883/pjtf.2022.04.52075.19053.

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The parameters of a high-current electron beam extracted from the self-focusing zone through a hole in the anode into a vacuum chamber are investigated. The beam parameters were determined from the measurement of the spatial distribution of destruction and glow arising in polymethyl methacrylate samples installed at different distances from the anode (electron beam autographs). The formation of two electron beams - a self-focused with a high energy density, propagating along the axis of the cone facing the base to the anode with an apex angle of ~ 7º and a high-energy beam of low density, prop

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Jakhar, Niketan, Sarvesh Kumar, Chandan Thakur, et al. "Design and optimizations of electrostatic low energy intense beam transport for H^- ion source in LINAC4 at CERN." Journal of Instrumentation 20, no. 03 (2025): P03015. https://doi.org/10.1088/1748-0221/20/03/p03015.

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Abstract The electrostatic low energy beam transport (ELEBT) is used to handle low energy and intense beams from ion sources. It is preferred over magnetostatic low energy beam transport (MLEBT) for many reasons such as compactness, no space charge compensation and no transverse phase space coupling, more beam current handling capacity and less emittance growth as well as beam losses. The MLEBT has served in Linear accelerator 4 (LINAC4) at CERN and has been in operation at the test stand for about a decade but with demands of increasing luminosity and source upgradation to provide more beam c

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Kondo, Kyohei. "Analysis of Potential Energy Release Rate of Composite Laminate Based on Timoshenko Beam Theory." Key Engineering Materials 334-335 (March 2007): 513–16. http://dx.doi.org/10.4028/www.scientific.net/kem.334-335.513.

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The Timoshenko beam theory is used to model each part of cracked beam and to calculate the potential energy release rate. Calculations are given for the double cantilever beam specimen, which is simulated as two separate beams connected elastically along the uncracked interface.

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Yalçın, Muhammet Muaz. "Flexural Behavior of 3D-Printed Carbon Fiber-Reinforced Nylon Lattice Beams." Polymers 16, no. 21 (2024): 2991. http://dx.doi.org/10.3390/polym16212991.

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This study investigates the flexural behavior of 3D-printed multi-topology lattice beams, with a specific emphasis on octet and cube lattice geometries created through fused deposition modeling (FDM). The mechanical properties of these beams were evaluated through quasi-static three-point bending tests. A comparative analysis of load-carrying capacity, energy absorption, and specific energy absorption (SEA) indicates that octet lattice beams exhibit superior performance to cube lattice beams. The octet lattice beam in the triple-layer double-column (TL-DC) arrangement absorbed 14.99 J of energ

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Wang, Gang. "Analysis of bimorph piezoelectric beam energy harvesters using Timoshenko and Euler–Bernoulli beam theory." Journal of Intelligent Material Systems and Structures 24, no. 2 (2012): 226–39. http://dx.doi.org/10.1177/1045389x12461080.

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Single-degree-of-freedom lumped parameter model, conventional finite element method, and distributed parameter model have been developed to design, analyze, and predict the performance of piezoelectric energy harvesters with reasonable accuracy. In this article, a spectral finite element method for bimorph piezoelectric beam energy harvesters is developed based on the Timoshenko beam theory and the Euler–Bernoulli beam theory. Linear piezoelectric constitutive and linear elastic stress/strain models are assumed. Both beam theories are considered in order to examine the validation and applicabi

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Konoplev, I. V., S. A. Bogacz, Y. Shashkov, and M. A. Gusarova. "Concept of circular-linear energy recovery accelerator to probe the energy frontier." Journal of Instrumentation 17, no. 01 (2022): P01011. http://dx.doi.org/10.1088/1748-0221/17/01/p01011.

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Abstract Energy-frontier accelerators provide powerful tools performing high precision measurements confirming the fundamentals of the physics and broadening new research horizons. Such machines are either driven by circular or linear accelerators. The circular machines, having the centre-of-mass (CM) energy values reaching 200 GeV (for leptons) and above, experience beam energy loss and quality dilution, for example, due to synchrotron radiation, limiting the overall CM energy achievable and requiring a constant energy top-up to compensate the loss and the beam quality dilution. Linear collid

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43

Hou, Xinyue, Xue Li, Shun Zhao, Yinsen Zhang, and Lulu Wang. "High-Precision Bi-Directional Beam-Pointing Measurement Method Based on Space Solar Power Station System." Sensors 24, no. 18 (2024): 6135. http://dx.doi.org/10.3390/s24186135.

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In the process of wireless energy transmission from a Space Solar Power Station (SSPS) to a satellite, the efficiency of energy transmission is closely related to the accuracy of beam control. The existing methods commonly ignore the impact of array position, structural deviation of the transmitting antenna, and modulation errors, which leads to the deviation error in actual energy transmission beams and the reduction of energy transmission efficiency. This paper innovatively proposes a high-precision bi-directional beam-pointing measurement method, which provides a technical basis for advanci

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Fowler, Alex J., and M. Pinar Menguc. "Propagation of Focused and Multibeam Laser Energy in Biological Tissue." Journal of Biomechanical Engineering 122, no. 5 (2000): 534–40. http://dx.doi.org/10.1115/1.1289993.

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The results of a Monte Carlo simulation of laser beam propagation in turbid media are presented. The study was performed to determine whether using a focused beam or multiple beams instead of a single collimated beam could improve subsurface laser energy delivery in biological tissue. A parametric study was carried out to determine both the laser fluence at a target depth and the ratio of fluence at the target over surface fluence as a function of tissue properties and the mode of energy delivery. It was found that the reduced scattering coefficient was the primary determinant as to whether mu

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Öztürk, İsmail. "Crashworthiness design of heat treated vehicle parts with tailored properties." Materials Testing 64, no. 4 (2022): 563–73. http://dx.doi.org/10.1515/mt-2022-2001.

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Abstract In this study, a boron steel bumper beam’s crashworthiness performance with three different hardness values and six different bumper beam designs with tailored properties was compared in passenger safety. Peak crushing force and energy absorption values of the beams were examined by frontal impact simulations. Minimum peak crushing force value was obtained with the O25 heat treated beam, the front side O25 and rear side T500 heat treated beam and the front side T500 and rear side O25 heat treated beam. The Front side T25 and rear side O25 heat treated beam gave the highest energy abso

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Josua, Timotius Manik, Okselia Anisza, Junios Junios, Margaretha Angelica, and Haryanto Freddy. "Evaluation of 6 MV photon beam characteristics on Varian Clinac iX: a Monte Carlo study." International Journal of Advances in Applied Sciences (IJAAS) 14, no. 1 (2025): 227–34. https://doi.org/10.11591/ijaas.v14.i1.pp227-234.

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This work aims to study the characteristics of photon beams through phase space file (PSF) analysis using Monte Carlo (MC) simulation. 6 MV photon beams from the Varian Clinac iX were simulated using PRIMO software. The beam parameters were validated by evaluating the percentage depth dose and dose profile. A full PSF was scored at the downstream end of the linear accelerator (LINAC) upper and lower parts and analyzed to determine the beam fluence profile, energy fluence profile, angular distribution, and spectral distribution. The results show that within PSF 1, the photon beam has an average

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Lee, Yongjoong. "Lifetime assessment of functional components in the ESS target environment during beam energy ramp up." Journal of Neutron Research 22, no. 2-3 (2020): 299–308. http://dx.doi.org/10.3233/jnr-200151.

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The Target Station at the European Spallation Source (ESS) is designed to convert high power proton beam to high brightness neutron beams, for studying fundamental properties of materials. Upon commissioning of the ‘beam on target’ planned in 2022, the ESS linac will deliver lower energy proton beam than the design value of 2 GeV, for neutron production. The beam energy will then be gradually ramped up, with the sequential commissioning of the downstream part of the superconducting cryomodules. During neutron production, the beam intercepting devices and moderators are exposed to intense flux

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Perry, Roy, and Yuri Lyubarsky. "The role of resonant plasma instabilities in the evolution of blazar-induced pair beams." Monthly Notices of the Royal Astronomical Society 503, no. 2 (2021): 2215–28. http://dx.doi.org/10.1093/mnras/stab324.

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ABSTRACT The fate of relativistic pair beams produced in the intergalactic medium by very high energy emission from blazars remains controversial in the literature. The possible role of resonance beam plasma instability has been studied both analytically and numerically but no consensus has been reached. In this paper, we thoroughly analyse the development of this type of instability. This analysis takes into account that a highly relativistic beam loses energy only due to interactions with the plasma waves propagating within the opening angle of the beam (we call them parallel waves), whereas

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JANG, Ji-Ho, Dong-O. JEON, Hyunchang JIN, and Hyungjin KIM. "Beam Commissioning of the Heavy-ion Accelerator RAON." Physics and High Technology 33, no. 5 (2024): 9–16. http://dx.doi.org/10.3938/phit.33.010.

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RAON (Rare-isotope Accelerator complex for ON-line experiments) is the superconducting linac (SCL3 and SCL2) facility in Korea. It consists of an injector, a superconducting linac, and user facilities. It is designed to accelerate various ion beams from proton (A/Q=1) to uranium (A/Q=7.2). The ECR ion source in the injector system generates ion beams with the energy of 10 keV/u. They are accelerated to the energy of 500 keV/u by the RFQ (Radio-Frequency Quadrupole) in the injector. The superconducting linac (SCL3) includes 22 QWR (Quater-Wave Resonator) cavities and 102 HWR (Half-Wave Resonato

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Saadatmand, K., J. D. Schneider, C. Geisik, and R. R. Stevens. "Beam structure studies of low-energy ion beams." Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 56-57 (May 1991): 1088–90. http://dx.doi.org/10.1016/0168-583x(91)95103-k.

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