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Добірка наукової літератури з теми "HELICAL WIGGER"

Автор: Grafiati
Опубліковано: 11 вересня 2023

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Статті в журналах з теми "HELICAL WIGGER"

1

Abedi-Varaki, Mehdi. "Electron acceleration of a surface wave propagating in wiggler-assisted plasma." Modern Physics Letters B 33, no. 23 (August 16, 2019): 1950267. http://dx.doi.org/10.1142/s0217984919502671.

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In this paper, we study the electron acceleration by a surface plasma wave (SPW) propagating through two parallel metal sheets in the presence of wiggler magnetic field strength. The configuration of interest consists of a helical magnetostatic wiggler, an external magnetic field and two parallel metal half-spaces. Dispersion relation of SPW in the attendance of helical magnetostatic wiggler is recognized and observed as compared with that of without wiggler field. A numerical calculation in Matlab software was developed by employing the fourth-order Runge–Kutta method for studying the electron energy and electron trajectory in SPW. Numerical results depict that with increasing of [Formula: see text]-parameter [Formula: see text] is the ratio of wiggler frequency to plasma frequency), minimum modes of SPW have an increasing trend and with increase of the wiggler frequency, the normalized frequencies decreased and a gap appeared between them. Furthermore, it is seen that with increase of the [Formula: see text]-parameter, the value of the kinetic energy as compared with the absence of the wiggler magnetic field increased. In fact, the electron energy gained is higher in the presence of a helical magnetostatic wiggler as compared with the absence of wiggler field. In addition, it is observed that due to effects of the wiggler field and SPW field, the electron traverses more distance in the propagation direction of the laser pulse.
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2

Fajans, J. "Bifilar helical wiggler magnet inductance." Review of Scientific Instruments 60, no. 9 (September 1989): 3073–74. http://dx.doi.org/10.1063/1.1140609.

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3

Lin, A. T., and Chih-Chien Lin. "Peniotron amplifiers with helical wiggler magnetic fields." IEEE Transactions on Plasma Science 24, no. 3 (June 1996): 838–42. http://dx.doi.org/10.1109/27.533086.

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4

Meurdesoif, Y., J. Gardelle, T. Lefevre, J. L. Rullier, and J. T. Donohue. "Characterization of a pulsed bifilar helical wiggler." Journal of Applied Physics 87, no. 9 (May 2000): 4499–506. http://dx.doi.org/10.1063/1.373096.

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5

Wang, Mei, S. Y. Park, and J. L. Hirshfield. "Helical magnetized wiggler for synchrotron radiation laser." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 429, no. 1-3 (June 1999): 419–23. http://dx.doi.org/10.1016/s0168-9002(99)00121-7.

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6

Nam, Soon-Kwon, and Ki-Bum Kim. "Chaotic behaviour in a realizable helical-wiggler field." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 507, no. 1-2 (July 2003): 69–73. http://dx.doi.org/10.1016/s0168-9002(03)00840-4.

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7

Vetrovec, J. "Design of a high-field taperable helical wiggler." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 296, no. 1-3 (October 1990): 563–67. http://dx.doi.org/10.1016/0168-9002(90)91267-f.

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8

Yeom, K. H., Jae Koo Lee, and T. H. Chung. "Wiggler-free FEL with an intense helical beam." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 358, no. 1-3 (April 1995): ABS52—ABS53. http://dx.doi.org/10.1016/0168-9002(94)01494-9.

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9

Calvo, Miguel, and Otto Rendon. "Field configurations in Helical magnetic wigglers." Review of Scientific Instruments 61, no. 1 (January 1990): 124–28. http://dx.doi.org/10.1063/1.1141887.

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10

Ohigashi, N., Y. Tsunawaki, M. Fujita, K. Imasaki, K. Mima, and S. Nakai. "Construction of compact FEM using solenoid-induced helical wiggler." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 507, no. 1-2 (July 2003): 250–55. http://dx.doi.org/10.1016/s0168-9002(03)00872-6.

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Дисертації з теми "HELICAL WIGGER"

1

KAKKAR, SACHIN. "ROLE OF HELICAL WIGGER ON THZ RADIATION GENERATION FROM FREE ELECTRON LASER." Thesis, 2016. http://dspace.dtu.ac.in:8080/jspui/handle/repository/14853.

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Анотація:
Terahertz (THz, or be called T-ray) wave refers to the electromagnetic wave with the frequency between 0.1 THz (1THz=1000GHz) and 10 THz or wavelength from 30 μm to 3000 μm. In the frequency domain, this region of electromagnetic wave is located between microwave and infrared wave. Different from the great successes in the microwave and infrared light wave, the applications of THz wave are much less investigated in the past few decades. Recently, it has recently been demonstrated that THz wave exhibits several unique features in terms of applications. For example, THz wave can easily penetrate fabrics and plastics, but it will be reflected by metallic materials. Thus, THz wave has a promising application in security screening. In order to realize the applications of THz wave, the compact, efficient, and high power THz sources have become a critical element of researches in THz wave. In this dissertation I have developed the formalism for tunable coherent terahertz radiation generation from a relativistic electron beam, modulated by two laser beams, as it passes through a helical wiggler. The lasers exert a ponderomotive force on beam electrons, and modulate their velocity. In the drift space, velocity modulation translates into density modulation. As the beam bunches pass through the wiggler, they acquire a transverse velocity, constituting a transverse current that acts as an antenna to produce coherent THz radiation. .
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Частини книг з теми "HELICAL WIGGER"

1

Nam, Soon-Kwon, and Ki-Bum Kim. "Chaotic behaviour in a realizable helical-wiggler field." In Free Electron Lasers 2002, 69–73. Elsevier, 2003. http://dx.doi.org/10.1016/b978-0-444-51417-2.50023-7.

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2

Ohigashi, N., Y. Tsunawaki, M. Fujita, K. Imasaki, K. Mima, and S. Nakai. "Construction of compact FEM using solenoid-induced helical wiggler." In Free Electron Lasers 2002, 250–55. Elsevier, 2003. http://dx.doi.org/10.1016/b978-0-444-51417-2.50063-8.

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3

Tsunawaki, Yoshiaki, Nobuhisa Ohigashi, Makoto Asakawa, Mitsuhiro Kusaba, Kazuo Imasaki, and Kunioki Mima. "Tunable Hybrid Helical Wiggler with Multiple-Poles per Period." In Free Electron Lasers 2003, II—3—II—4. Elsevier, 2004. http://dx.doi.org/10.1016/b978-0-444-51727-2.50141-3.

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4

Tsunawaki, Yoshiaki, Nobuhisa Ohigashi, Makoto Asakawa, Kazuo Imasaki, and Kunioki Mima. "Magnetic field analysis of hybrid helical wiggler with multiple poles per period." In Free Electron Lasers 2002, 166–69. Elsevier, 2003. http://dx.doi.org/10.1016/b978-0-444-51417-2.50045-6.

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5

"Conversion of a Whistler Wave into a Controllable Helical Wiggler Magnetic Field." In Electromagnetics of Time Varying Complex Media, 223–34. CRC Press, 2010. http://dx.doi.org/10.1201/9781439817070-a6.

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6

Yu, Junsheng. "Gain of free electron laser for a combined helical wiggler with an axial guide magnetic field near magnetoresonance." In Free Electron Lasers 1997, II—10—II—11. Elsevier, 1998. http://dx.doi.org/10.1016/b978-0-444-82978-8.50108-1.

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7

Mikhailov, S. F., V. N. Litvinenko, N. G. Gavrilov, O. A. Shevchenko, N. A. Vinokurov, and P. D. Vobly. "Improvement of the field quality in the helical wigglers for the OK-5 VUV FEL at Duke." In Free Electron Lasers 2002, 294–98. Elsevier, 2003. http://dx.doi.org/10.1016/b978-0-444-51417-2.50071-7.

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Тези доповідей конференцій з теми "HELICAL WIGGER"

1

Niculescu, V. I. R., Vasile D. Babin, and Mihaela Dan. "Helical radial sinusoidal modulated wiggler." In ROMOPTO 2000: Sixth Conference on Optics, edited by Valentin I. Vlad. SPIE, 2001. http://dx.doi.org/10.1117/12.432831.

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2

Hang, Pingshan. "Transportation of intense relativistic electron beams in a bifilar helical wiggler." In 16th International Conference on Infrared and Millimeter Waves. SPIE, 2017. http://dx.doi.org/10.1117/12.2297992.

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3

Kalluri, D. K. "Conversion of a whistler wave into a controllable helical wiggler magnetic field." In IEEE Conference Record - Abstracts. 1996 IEEE International Conference on Plasma Science. IEEE, 1996. http://dx.doi.org/10.1109/plasma.1996.551661.

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4

Wilk, Andrzej B., Henryk M. Madej, and Bogusław E. Łazarz. "Vibration Processing Techniques for Fault Detection in Gearboxes." In ASME 2003 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/detc2003/ptg-48084.

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Vibration analysis is a very important tool in condition monitoring of operating machines. Many signal processing methods have been developed to extract information about incipient faults from externally measured vibration signals. The article presents the laboratory examinations of some faults in spur and helical gears. In case of spur gears two types of progressing local faults of cracked and chipped gear tooth were simulated and the smoothed pseudo Wigner-Ville distribution was used to demonstrate fault advancement via residual vibration signal analysis. Observing changes in the features of the WV distribution in the contour plots and changes of Kurtosis value monitored the progression of a fault. In case of helical gears some signal changes of transverse vibration velocity of shafts during the process of pitting growth in the tooth working surface have been investigated. Some new indices of pitting wear have been suggested and compared with other non-dimensional discriminants.
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5

Esmaeilzadeh, M., and Mohammad S. Fallah. "Chaotic Electron Dynamic in a Three - Dimensional Helical Wiggler with Ion channel Guiding." In >2006 Joint 31st International Conference on Infrared Millimeter Waves and 14th International Conference on Teraherz Electronics. IEEE, 2006. http://dx.doi.org/10.1109/icimw.2006.368269.

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6

Esmaeilzadeh, M. "Effects of Self-Fields on Gain in a Helical Wiggler and Axial Magnetic Field." In >2006 Joint 31st International Conference on Infrared Millimeter Waves and 14th International Conference on Teraherz Electronics. IEEE, 2006. http://dx.doi.org/10.1109/icimw.2006.368763.

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7

Esmaeilzadeh, M., and M. Mirzakhani. "Effects of self-fields on dispersion relation in a helical wiggler with ion-channel guiding." In 2007 Joint 32nd International Conference on Infrared and Millimeter Waves and the 15th International Conference on Terahertz Electronics (IRMMW-THz). IEEE, 2007. http://dx.doi.org/10.1109/icimw.2007.4516486.

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8

Esmaeilzadeh, Mahdi, and Vahid Ghfouri. "Self-fields and their effects on electron orbits in a three-dimensional helical wiggler free-electron laser." In 2008 33rd International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz 2008). IEEE, 2008. http://dx.doi.org/10.1109/icimw.2008.4665836.

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9

KORDBACHEH, A. A., B. MARAGHECHI, and H. AGHAHOSSEINI. "ANALYSIS OF FREE-ELECTRON LASER WITH HELICAL WIGGLER AND AN ION-CHANNEL GUIDING BY RELATIVISTIC RAMAN BACKSCATTERING THEORY." In Proceedings of the XI Regional Conference. WORLD SCIENTIFIC, 2005. http://dx.doi.org/10.1142/9789812701862_0051.

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10

Pan, Min-chun. "Mechanical Noise Identification Using Time-Frequency Representations." In ASME 2001 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/detc2001/vib-21005.

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Анотація:
Abstract Three computation schemes of time-frequency representations (TFRs) have been developed and implemented to identify different components of mechanical noise originated from the transmission system of electrical vehicles. This study explores the close relationships between three TFRs, i.e. the spectrogram based on windowed Fourier transform (WFT), the Wigner-Ville distribution (WVD), and the smoothed WVD (SWVD). One main purpose is to pursue the efficiency of computing the SWVD of a dynamic signature. The revised scheme can tremendously reduce the computation time to a scale of around 1/90, compared with the original scheme. To assess the validation of these TFR schemes, firstly, four synthetic signals are designed and processed. Secondly, the developed TFRs are applied to distinguish different spectral components of transmission noise, and identify their sources. This study takes an electrical scooter with a continuous velocity transmission (CVT) system as a test bench. The CVT-belt noise, helical-gear whine noise, and fan noise can be clearly identified via the processing of the TFRs. These obtained conclusions can be used as references for machine element modification to improve annoying noise.
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Звіти організацій з теми "HELICAL WIGGER"

1

Caspi, S. Forces in a Thin Cosine (nTheta) Helical Wiggler. Office of Scientific and Technical Information (OSTI), May 1997. http://dx.doi.org/10.2172/1001640.

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Caspi, S. Forces in a thin cosine(n{theta}) helical wiggler. Office of Scientific and Technical Information (OSTI), March 1995. http://dx.doi.org/10.2172/125418.

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3

Caspi, S. Magnetic field components in a sinusoidally varying helical wiggler. Office of Scientific and Technical Information (OSTI), July 1994. http://dx.doi.org/10.2172/10180667.

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4

Caspi, S. The vector potential and stored energy of thin cosine (n{theta}) helical wiggler magnet. Office of Scientific and Technical Information (OSTI), December 1995. http://dx.doi.org/10.2172/207361.

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