Academic literature on the topic 'Beam wave'

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Journal articles on the topic "Beam wave"

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Ansari, A., M. S. Patel, S. P. Mishra, Arvind Kumar, Asheel Kumar, and A. Varma. "Excitation of large-amplitude electron plasma wave by counterpropagation of two laser beams in spherical nanoparticles." Laser Physics 35, no. 4 (2025): 045402. https://doi.org/10.1088/1555-6611/adc559.

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Abstract The counterpropagation interaction of two different laser beams with a spherical nanoparticle medium is used to excite a large-amplitude electron plasma wave. The two laser beams having slightly different frequencies cause beat wave generation at the beat wave number k = k 1 + k 2 and beat wave frequency ω = ω 1 − ω 2 . The high-power laser beam radiation ionizes the atoms of the nanoparticles and subsequently converts them into plasma plume balls. The gradient in the field of each laser beam is considered to be responsible for the generation of a nonlinear ponderomotive force to the
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Narita, Y., U. Motschmann, H. Comişel, and D. Schmid. "Double Beam Instability for the Mercury Upstream Waves." Astrophysical Journal 983, no. 2 (2025): 125. https://doi.org/10.3847/1538-4357/adc1bc.

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Abstract Mercury shock-upstream region is plasma physically of great interest, as the solar wind plasma may encounter two ion beams, forming a double-beam plasma system. Properties of the double-beam instability are studied semianalytically using the magnetoionic theory (cold plasma waves including beams), such as the unstable mode, the resonance wavenumbers, and the growth rates, for various beam configurations. The cold plasma wave theory supports the idea that both the foreshock ions and the pickup ions can potentially drive the right-hand beam instability, and moreover, the instability may
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Ji, Jianyi, Ronghui Wang, Niujing Ma, Kunhong Huang, and Xiang Zhang. "Study of flexural wave propagation through a cable stayed beam subjected to a moving load." Advances in Structural Engineering 25, no. 5 (2022): 1057–71. http://dx.doi.org/10.1177/13694332211063248.

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A physical perspective of the propagation and attenuation of flexural waves is presented in this paper for the dynamic behaviors of cable stayed beams subjected to a moving load. Based on the method of reverberation-ray matrix (MRRM), the waveform solutions of the wave equations of a simplified beam-cable system subjected to a moving load (hereinafter referred to as a beam-cable system) are given, and the theory is verified by a numerical example. The dynamic response of cable stayed beams is decomposed into nine kinds of flexural waves, including traveling waves, near-field waves, and nondisp
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Mei, C., and B. R. Mace. "Wave Reflection and Transmission in Timoshenko Beams and Wave Analysis of Timoshenko Beam Structures." Journal of Vibration and Acoustics 127, no. 4 (2004): 382–94. http://dx.doi.org/10.1115/1.1924647.

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This paper concerns wave reflection, transmission, and propagation in Timoshenko beams together with wave analysis of vibrations in Timoshenko beam structures. The transmission and reflection matrices for various discontinuities on a Timoshenko beam are derived. Such discontinuities include general point supports, boundaries, and changes in section. The matrix relations between the injected waves and externally applied forces and moments are also derived. These matrices can be combined to provide a concise and systematic approach to vibration analysis of Timoshenko beams or complex structures
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Singh, 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 (2015): 621–32. http://dx.doi.org/10.1017/s0263034615000646.

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AbstractThis paper presents a scheme for beat wave excitation of an electron plasma wave (EPW) by cross-focusing of two intense cosh-Gaussian (ChG) laser beams in an under dense collisional plasma. The plasma wave is generated on account of beating of two ChG laser beams of frequencies ω1 and ω2. Starting from Maxwell's equations, coupled differential equations governing the evolution of spot size of laser beams with distance of propagation have been derived by using Moment theory approach in Wentzel–Kramers–Brillouin approximation. The collisional nonlinearity depends not only on the intensit
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HUANG, YEN-CHIEH. "LASER BEAT-WAVE BUNCHED BEAM FOR COMPACT SUPERRADIANCE SOURCES." International Journal of Modern Physics B 21, no. 03n04 (2007): 287–99. http://dx.doi.org/10.1142/s0217979207042069.

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A periodically bunched electron beam is useful for generating high-brightness electron superradiance. This paper studies the generation and acceleration of density-modulated electron beams from a photocathode electron gun driven by a laser beat wave. Computer simulation shows the feasibility of accelerating and preserving the density-modulated electron beam in an accelerator. This paper also details the implementation of a beat-wave laser system with a variable beat frequency for driving a photocathode electron gun.
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Zhao, Dong, and Ying Liu. "Effects of director rotation relaxation on viscoelastic wave dispersion in nematic elastomer beams." Mathematics and Mechanics of Solids 24, no. 4 (2018): 1103–15. http://dx.doi.org/10.1177/1081286518773516.

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In this paper, the transverse wave dispersion in a nematic elastomer (NE) Timoshenko beam is studied by considering anisotropy and viscoelasticity of NEs in the low frequency limit. Firstly, the characteristic equations of wave motion in an NE beam are derived, and then numerically solved to obtain the corresponding phase velocities and attenuation factors. The influences of anisotropic parameter, director rotation and rubber relaxation times on the wave dispersion in an NE beam are discussed. Results show that unlike the situation in general isotropic viscoelastic beam, non-classical viscoela
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Erofeenko, V. T., and I. S. Kozlovskaja. "Modeling of narrow beams of electromagnetic waves with axial symmetry on a plane." Doklady of the National Academy of Sciences of Belarus 67, no. 1 (2023): 7–13. http://dx.doi.org/10.29235/1561-8323-2023-67-1-7-13.

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A mathematical model of narrow beams of monochromatic electromagnetic waves propagating in vacuum is developed. Beams of electromagnetic waves are constructed with the order of axial symmetry m m( 0,1, 2, ), = K characterized by the beam localization radius Rпуч, the beam narrowness parameter n n( 2), ≥ and the beam attenuation coefficient N N( 2). ≥ The structure of the electric field for a TE-polarized wave beam is studied numerically.
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Fitio, Volodymyr, Iryna Yaremchuk, Andriy Bendziak, Michal Marchewka, and Yaroslav Bobitski. "Diffraction of a Gaussian Beam with Limited cross Section by a Volume Phase Grating under Waveguide Mode Resonance." Materials 14, no. 9 (2021): 2252. http://dx.doi.org/10.3390/ma14092252.

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In this work, the diffraction of a Gaussian beam on a volume phase grating was researched theoretically and numerically. The proposed method is based on rigorous coupled-wave analysis (RCWA) and Fourier transform. The Gaussian beam is decomposed into plane waves using the Fourier transform. The number of plane waves is determined using the sampling theorem. The complex reflected and transmitted amplitudes are calculated for each RCWA plane wave. The distribution of the fields along the grating for the reflected and transmitted waves is determined using inverse Fourier transform. The powers of
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Lv, Hangyuan, Shangjie Li, Xianzhen Huang, and Zhongliang Yu. "Band-Gap Properties of Finite Locally Resonant Beam Suspended Periodically with Two-Degree-of-Freedom Force Type Resonators." Crystals 11, no. 6 (2021): 716. http://dx.doi.org/10.3390/cryst11060716.

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The propagation properties of waves in finite Timoshenko locally resonant (LR) beams resting on forced vibrations and periodically attached two-degree-of-freedom force-type resonators are studied by the wave-based analysis approach. By calculating the motion equations of the beam, the transmission and reflection matrices of waves at the resonator attached point are first derived, and the forced vibration response of the finite periodic beam is deduced by the wave-based approach. Several examples are also analyzed by the finite element method to verify the high accuracy of the developed wave-ba
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Dissertations / Theses on the topic "Beam wave"

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Zhang, Deyou. "Training Beam Sequence Design for Millimeter Wave Tracking Systems." Thesis, The University of Sydney, 2020. https://hdl.handle.net/2123/22479.

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In this thesis, the researcher considers a time-varying millimeter wave multiple-input single-output system, where several different training beam sequence designs that are suitable for different beam tracking scenarios have been proposed. In the case where the codebook-based training beams are used, the researcher firstly introduces a power-based estimator to update the stale angle-of-departure (AoD) in each beam tracking period when the beam codebook is a unitary matrix. Moreover, the power-based estimator is also extended to the case where the codewords constituting the beam codebook are no
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Noujeim, Karam M. "Fixed-frequency beam-steerable leaky-wave antennas." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0016/NQ45831.pdf.

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Gradinaru, Adrian. "Millimeter-wave scanning-beam phased array antenna." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0001/MQ40937.pdf.

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Horger, John. "Multiple plane wave analysis of acousto-optic diffraction of Gaussian shaped light beams." Thesis, Virginia Tech, 1987. http://hdl.handle.net/10919/44053.

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A short history of acousto-optics research is presented along with a general description of how light and sound interact. <p>The Multiple Scattering model is derived and used with a Gaussian light beam to observe the distortion in light beam profile within the sound field. Numerical results are presented for comparison to previous studies using thick holograms and two orders of light. The results from using two light orders are compared to four light order results. <p>A Hamming sound amplitude distribution is introduced as a possible way to reduce the amount of light beam profile di
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Tao, Yuming. "Multiple-beam antenna array for millimeter-wave wireless communications." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0005/NQ39397.pdf.

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Jasim, Mohammed. "Initial Beam Access Schemes for Millimeter Wave Cellular Networks." Thesis, University of South Florida, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10791507.

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<p> Millimeter wave technologies present an appealing solution for increasing data throughputs as they provide abundant contiguous channel bandwidths as compared to conventional microwave networks. However, millimeter wave technologies suffer from severe propagation limitations and channel impairments such as atmospheric attenuation and absorption, path and penetration losses, and blockage sensitivity. Therefore, phased arrays and beamforming technologies are necessary to compensate for the degraded signal levels due to the aforementioned factors. Namely, base stations and mobile stations util
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Huang, Jeffrey. "Numerical solutions of continuous wave beam in nonlinear media." PDXScholar, 1987. https://pdxscholar.library.pdx.edu/open_access_etds/3742.

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Deformation of a Gaussian beam is observed when it propagates through a plasma. Self-focusing of the beam may be observed when the intensity of the laser increases the index of refraction of plasma gas. Due to the difficulties in solving the nonlinear partial differential equation in Maxwell's wave equation, a numerical technique has been developed in favor of the traditional analytical method. Result of numerical solution shows consistency with the analytical method. This further suggests the validity of the numerical technique employed. A three dimensional graphics package was used to depict
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Huang, Chi-Luen. "Effect of beam diffraction on nonlinear Rayleigh surface wave measurement." Thesis, Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/47537.

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This research investigates the effects of beam diffraction from a source of finite width on nonlinear Rayleigh wave propagation in an elastic half space. Previous work has shown that nonlinear ultrasonic Rayleigh waves can be used to evaluate material damage due to plastic deformation and fatigue. In this measurement, a relatively small wedge transducer is employed to launch Rayleigh surface waves in the specimen and the first and second harmonic amplitudes are measured in the far field as a function of propagation distance. In order to obtain a reliable set of measurement data, one needs to m
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Wiggins, Samuel Mark. "Experimental investigation of electron beam wave interactions utilising short pulses." Thesis, University of Strathclyde, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.248699.

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Menday, Roger. "The forced vibration of a partially delaminated beam." Thesis, Loughborough University, 1999. https://dspace.lboro.ac.uk/2134/27082.

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The forced vibration of a partially delaminated structure such as an aircraft wing can result in catastrophic crack growth. In order to look at the underlying mechanism of the dynamics and failure of the material, a simplified model of a cantilever beam with a single delamination at its free end is considered. We investigate a number of aspects of this system, using mathematical models to gain insight into its behaviour.
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Books on the topic "Beam wave"

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Guo, Bao-Zhu, and Jun-Min Wang. Control of Wave and Beam PDEs. Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-12481-6.

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G, Lesurf J. C., ed. Selected papers on Gaussian beam mode optics for millimeter-wave and terahertz systems. SPIE Optical Engineering Press, 1993.

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Gradinaru, Adrian. Millimeter-wave scanning-beam phased array antenna. National Library of Canada, 1998.

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Yura, H. T. Optical beam wave propagation through complex optical systems. Riso National Laboratory, 1986.

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service), SpringerLink (Online, ed. Beam-Wave Interaction in Periodic and Quasi-Periodic Structures. Springer-Verlag Berlin Heidelberg, 2011.

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Yamauchi, Junji. Propagating beam analysis of optical waveguides. Research Studies Press, 2003.

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Schächter, Levi. Beam-Wave Interaction in Periodic and Quasi-Periodic Structures. Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-19848-9.

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Schlüter, H., and A. Shivarova, eds. Advanced Technologies Based on Wave and Beam Generated Plasmas. Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-017-0633-9.

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Schächter, Levi. Beam-Wave Interaction in Periodic and Quasi-Periodic Structures. Springer Berlin Heidelberg, 1997. http://dx.doi.org/10.1007/978-3-662-03398-2.

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H, Schlüter, and Shivarova A, eds. Advanced technologies based on wave and beam generated plasmas. Kluwer, 1999.

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Book chapters on the topic "Beam wave"

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Sasiela, Richard J. "Beam Shape." In Springer Series on Wave Phenomena. Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/978-3-642-85070-7_13.

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Zohuri, Bahman. "All About Wave Equations." In Directed-Energy Beam Weapons. Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-20794-6_2.

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Zohuri, Bahman. "Scalar Wave Energy as Weapon." In Directed-Energy Beam Weapons. Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-20794-6_6.

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Zohuri, Bahman. "Millimeter-Wave Energy as Weapon." In Directed-Energy Beam Weapons. Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-20794-6_7.

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Chen, Shun-Ping, and Heinz Schmiedel. "Introduction to Electromagnetic Wave Propagation." In RF Antenna Beam Forming. Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-21765-4_1.

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Chen, Shun-Ping, and Heinz Schmiedel. "Introduction to Electromagnetic Wave Propagation." In RF Antenna Beam Forming. Springer International Publishing, 2024. http://dx.doi.org/10.1007/978-3-031-67081-7_1.

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Masoudi, Husain M., and John M. Arnold. "Parallel-Processing Finite-Difference Beam Propagation Methods." In Guided-Wave Optoelectronics. Springer US, 1995. http://dx.doi.org/10.1007/978-1-4899-1039-4_51.

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Koh, Yujiro. "Are Two-Beam Self-Interferences Mass-Independent?" In Wave-Particle Duality. Springer US, 1992. http://dx.doi.org/10.1007/978-1-4615-3332-0_8.

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Lörincz, A., and L. Andor. "Single-Beam Thermal Wave Microscopes." In Photoacoustic and Photothermal Phenomena. Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/978-3-540-48181-2_130.

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Choi, Jun H., and Tatsuo Itoh. "Beam-Scanning Leaky-Wave Antennas." In Handbook of Antenna Technologies. Springer Singapore, 2016. http://dx.doi.org/10.1007/978-981-4560-44-3_60.

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Conference papers on the topic "Beam wave"

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Riemensberger, Johann, Nikolai Kuznetsov, Alberto Nardi, et al. "Continuous-wave optical parametric amplification in photonic integrated circuits." In Laser Resonators, Microresonators, and Beam Control XXVII, edited by Andrea M. Armani, Alexis V. Kudryashov, Vladimir S. Ilchenko, Andrey B. Matsko, and Julia V. Sheldakova. SPIE, 2025. https://doi.org/10.1117/12.3044827.

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Pawar, Sheetal, Mithra Venkatesan, Nilakshi Rajule, Anil Poul, Sneha Kodag, and Nikhil Dindokar. "Beam Prediction in Millimeter Wave Communication." In 2024 8th International Conference on Computing, Communication, Control and Automation (ICCUBEA). IEEE, 2024. https://doi.org/10.1109/iccubea61740.2024.10775289.

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Santamaria Botello, Gabriel. "Electro-optic parametric circuits as low-noise millimiter-wave receivers." In Laser Resonators, Microresonators, and Beam Control XXVII, edited by Andrea M. Armani, Alexis V. Kudryashov, Vladimir S. Ilchenko, Andrey B. Matsko, and Julia V. Sheldakova. SPIE, 2025. https://doi.org/10.1117/12.3046492.

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An, Zeyu, Cuiwei Tang, Wangjie Zhang, and Zhiya Zhang. "A Holographic Beam-Scanning Leaky-Wave Antenna for Millimeter-Wave Communication." In 2024 IEEE 12th Asia-Pacific Conference on Antennas and Propagation (APCAP). IEEE, 2024. https://doi.org/10.1109/apcap62011.2024.10880991.

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Wang, Zhaoyang, Yijie Shen, Zhensong Wan, Qiang Liu, and Xing Fu. "To unify travelling- and standing-wave ray-wave structured light by coherent wave packets." In Laser Beam Shaping XXI, edited by Angela Dudley and Alexander V. Laskin. SPIE, 2021. http://dx.doi.org/10.1117/12.2596426.

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Brandsberg-Dahl, S., and J. T. Etgen. "Beam-Wave Migration." In 65th EAGE Conference & Exhibition. European Association of Geoscientists & Engineers, 2003. http://dx.doi.org/10.3997/2214-4609-pdb.6.b12.

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Brandsberg‐Dahl, Sverre, and John T. Etgen. "Beam‐wave imaging." In SEG Technical Program Expanded Abstracts 2003. Society of Exploration Geophysicists, 2003. http://dx.doi.org/10.1190/1.1818111.

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Ogata, S., H. Hosokawa, and T. Yamashita. "LiNbO3 blazed grating fabricated by reactive ion-beam etching." In Integrated and Guided Wave Optics. Optica Publishing Group, 1988. http://dx.doi.org/10.1364/igwo.1988.tud5.

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A guided-wave acousto-optic device will certainly serve important functions such as deflection, modulation and switching of laser light beams in future optical communication and processing systems. We had experimentally demonstrated, for the first time, a high-performance guided-wave acousto-optic light beam deflector by employing blazed grating couplers as shown in Fig.11. In order to realize their high coupling efficiency, the blazed grating couplers had been developed by the reactive ion-beam etching(RIBE) technique using holographically produced photoresist gratings as masks2.
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Spentza, Eirini, and Chris Swan. "Wave-Vessel Interactions in Beam Seas." In ASME 2009 28th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2009. http://dx.doi.org/10.1115/omae2009-79605.

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This paper concerns the nonlinear interaction of waves with a floating vessel. A detailed experimental study has been undertaken in a 3-D wave basin, using a scaled model tanker subject to a variety of incident wave conditions. The vessel, which is free to move in heave, pitch and roll, has a draft of 14m (at full-scale) and is subject to a range of incident wave periods propagating at right angles to the side shell of the vessel. Measurements undertaken with and without the vessel in place allow the diffracted-radiated wave field to be identified. The laboratory data indicate that the diffrac
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Li, JianQing, YuLu Hu, Bin Li, et al. "Beam-wave interaction simulator." In 2007 International Conference on Microwave and Millimeter Wave Technology. IEEE, 2007. http://dx.doi.org/10.1109/icmmt.2007.381357.

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Reports on the topic "Beam wave"

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Manasse, R. Pencil beam radar selectivity of ocean wave spectra. Office of Scientific and Technical Information (OSTI), 1994. http://dx.doi.org/10.2172/88599.

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Williams, Ronald L. Electron Beam Transport in Advanced Plasma Wave Accelerators. Office of Scientific and Technical Information (OSTI), 2013. http://dx.doi.org/10.2172/1061446.

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Huang, Jeffrey. Numerical solutions of continuous wave beam in nonlinear media. Portland State University Library, 2000. http://dx.doi.org/10.15760/etd.5626.

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Rahmani, Mehran, and Manan Naik. Structural Identification and Damage Detection in Bridges using Wave Method and Uniform Shear Beam Models: A Feasibility Study. Mineta Transportation Institute, 2021. http://dx.doi.org/10.31979/mti.2021.1934.

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This report presents a wave method to be used for the structural identification and damage detection of structural components in bridges, e.g., bridge piers. This method has proven to be promising when applied to real structures and large amplitude responses in buildings (e.g., mid-rise and high-rise buildings). This study is the first application of the method to damaged bridge structures. The bridge identification was performed using wave propagation in a simple uniform shear beam model. The method identifies a wave velocity for the structure by fitting an equivalent uniform shear beam model
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Morey, I. J., and C. K. Birdsall. Traveling-wave-tube simulation: The IBC (Interactive Beam-Circuit) code. Office of Scientific and Technical Information (OSTI), 1989. http://dx.doi.org/10.2172/6330238.

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Olsen, R. C., D. R. Lowery, and J. L. Roeder. Plasma Wave Observations During Electron Beam Experiments at High Altitudes. Defense Technical Information Center, 1990. http://dx.doi.org/10.21236/ada217780.

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Ellison, Chad M., Matthew Perricone, Kevin M. Faraone, Robert Allen Roach, and Jerome T. Norris. Evaluation of weld porosity in laser beam seam welds: optimizing continuous wave and square wave modulated processes. Office of Scientific and Technical Information (OSTI), 2007. http://dx.doi.org/10.2172/902878.

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Elson, J. M., and Phuc Tran. Coupling of Gaussian Incident Beam Energy into Planar Guided Wave Structures. Defense Technical Information Center, 1997. http://dx.doi.org/10.21236/ada325112.

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Bain, Rachel, Richard Styles, and Jared Lopes. Ship-induced waves at Tybee Island, Georgia. Engineer Research and Development Center (U.S.), 2022. http://dx.doi.org/10.21079/11681/46140.

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Commercial vessels transiting the Savannah entrance channel intermittently generate large wake events at Tybee Island, Georgia, creating a potential hazard for beachgoers. However, not all commercial vessels generate large wakes, and the relationship between vessel dimensions, operating conditions, wake height, and drawdown magnitude is unclear. This study evaluates bathymetric data, high-frequency wave and vessel wake measurements, and broadcast vessel identification over a 4-month period with the goal of providing a quantitative characterization of vessel wake conditions at Tybee Island. Dat
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Hull, Andrew J., and David A. Hurdis. An Inverse Method for Measuring the Flexural Wave Properties of a Beam. Defense Technical Information Center, 2001. http://dx.doi.org/10.21236/ada401029.

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