Relevant bibliographies by topics / RF Pulse Compressor

Academic literature on the topic 'RF Pulse Compressor'

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Published: 1 April 2023

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Journal articles on the topic "RF Pulse Compressor"

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Shu, Guan, Feng-Li Zhao, Shi-Lun Pei, and Ou-Zheng Xiao. "RF modulation studies on an S band pulse compressor." Chinese Physics C 40, no. 3 (March 2016): 037002. http://dx.doi.org/10.1088/1674-1137/40/3/037002.

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Li, Zongbin, Wencheng Fang, Qiang Gu, and Zhentang Zhao. "RF design of a C-band compact spherical RF pulse compressor for SXFEL." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 863 (August 2017): 7–14. http://dx.doi.org/10.1016/j.nima.2017.05.017.

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Karsli, Ozlem, Avni Aksoy, Caglar Kaya, Burak Koc, Mustafa Dogan, O. Faruk Elcim, and Mehmet Bozdogan. "High power RF operations studies at TARLA facility." Canadian Journal of Physics 97, no. 11 (November 2019): 1171–76. http://dx.doi.org/10.1139/cjp-2018-0778.

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Turkish Accelerator and Radiation Laboratory (TARLA) is a facility capable of accelerating an electron beam up to 40 MeV. Two beamlines were proposed to generate free-electron laser radiation and bremsstrahlung. The accelerator employs two normal conducting cavities, so-called buncher cavities: subharmonic buncher (SHB) and fundamental buncher (FB), and two cryomodules that house two TESLA cavities each. SHB operates in 260 MHz and FB in 1.3 GHz, and is powered by 1.5 kW and 500 W radio frequency (RF) amplifiers, respectively. Each TESLA cavity is driven by 18 kW saturated high-power solid-state amplifiers (SSA). In addition, a L band pulse compressor system is designed and implemented at the facility to actively promote high-power RF research. Currently, setup of a resonant ring test bench is approved to test the RF components under high power RF conditions. This paper describes the TARLA high power RF, RF controller, and network structures. High power tests and measurements of the RF components of the TARLA beamline are given. Outcomes from the operation of the L band pulse compressor are explained, and the resonant ring test stand is stated as a summary.
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Shu, Guan, Feng-Li Zhao, and Xiang He. "RF study of a C-band barrel open cavity pulse compressor." Chinese Physics C 39, no. 5 (May 2015): 057005. http://dx.doi.org/10.1088/1674-1137/39/5/057005.

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Fernandes, P., R. Parodi, C. Salvo, and B. Spataro. "The design of TE storage cavities for a rf pulse compressor system." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 288, no. 2-3 (March 1990): 549–54. http://dx.doi.org/10.1016/0168-9002(90)90151-u.

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Golubičić, Zoran, Slobodan Simić, and Aleksa J. Zejak. "Design and EPGA Implementation of Digital Pulse Compression for Band–Pass Radar Signals." Journal of Electrical Engineering 64, no. 3 (May 1, 2013): 191–95. http://dx.doi.org/10.2478/jee-2013-0028.

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The paper presents fully digitized approach for band-pass discrete coded radar signals. The emphasis is to use one generalized reconfigurable compressor for several different types of signals and different types of receivers. It fits for direct radio frequency receiver (RF) as well as for intermediate frequency (IF) receiver. The system implementation on field programmable gate area (FPGA) let us eliminate special chips previously needed. From the experimental results it is known that this approach appears to work well for matched and mismatched pulse compression and it outstands when timebandwidth product (TB) is of order 1000. A precision of 14 bits has been considered in the input signal and 16 bits in the filter coefficients. It gives the dynamic range of 78 dB and the quantification error less than 0.012%.
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VAN DER GEER, S. B., O. J. LUITEN, and M. J. DE LOOS. "DESIGN OF A 2 kA, 30 fs RF-PHOTOINJECTOR FOR WATERBAG COMPRESSION." International Journal of Modern Physics A 22, no. 22 (September 10, 2007): 4000–4005. http://dx.doi.org/10.1142/s0217751x07037573.

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Because uniformly filled ellipsoidal ‘waterbag’ bunches have linear self-fields in all dimensions, they do not suffer from space-charge induced brightness degradation. This in turn allows very efficient longitudinal compression of high-brightness bunches at sub or mildly relativistic energies, a parameter regime inaccessible up to now due to detrimental effects of non-linear space-charge forces. To demonstrate the feasibility of this approach, we investigate ballistic bunching of 1 MeV, 100 pC waterbag electron bunches, created in a half-cell rf-photogun, by means of a two-cell booster-compressor. Detailed GPT simulations of this table-top set-up are presented, including realistic fields, 3D space-charge effects, path-length differences and image charges at the cathode. It is shown that with a single 10MW S-band klystron and fields of 100 MV/m, 2kA peak current is attainable with a pulse duration of only 30 fs at a transverse normalized emittance of 1.5 μm.
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Zhang, Jingru, Cai Meng, Dazhang Li, Dou Wang, Guoxi Pei, Hua Shi, Jie Gao, Xiang He, Xiaoping Li, and Yunlong Chi. "R&D of CEPC injector linac." International Journal of Modern Physics A 36, no. 22 (August 5, 2021): 2142013. http://dx.doi.org/10.1142/s0217751x21420136.

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The CEPC includes a main ring and an injector. The injector consists of a booster and a linac. In order to meet the requirements of the booster, the baseline design of the linac is a 10 GeV electron and positron linac. Two alternative linac designs have also been introduced in this paper. For the linac baseline design, one-bunch-per-pulse is adopted. A 1.1 GeV damping ring is used to reduce the transverse emittance of positron beam. The main RF system of the linac adopts normal conducting S-band structure. Some key technologies of linac are development. The S-band structure and pulse compressor have been researched and studied. In the damping ring, two cavities used to provide 2 MV voltage. The preliminary cavity design has finished.
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Krainara, Siriwan, Shuya Chatani, Heishun Zen, Toshiteru Kii, and Hideaki Ohgaki. "Manipulation of Laser Distribution to Mitigate the Space-Charge Effect for Improving the Performance of a THz Coherent Undulator Radiation Source." Particles 1, no. 1 (November 7, 2018): 238–52. http://dx.doi.org/10.3390/particles1010018.

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A THz coherent undulator radiation (THz-CUR) source has been developed at the Institute of Advanced Energy, Kyoto University. A photocathode Radio-Frequency (RF) gun and a bunch compressor chicane are used for generating short-bunch electron beams. When the electron beam energy is low, the space-charge effect strongly degrades the beam quality, such as the bunch length and the energy spread at the high bunch charge condition at around 160 pC, and results in the reduction of the highest frequency and the maximum radiated power of the THz-CUR. To mitigate the space charge effect, we have investigated the dependence of the electron beam quality on the laser distribution in transverse and longitudinal directions by using a numerical simulation code, General Particle Tracer GPT. The manipulation of the laser distribution has potential for improving the performance of the THz-CUR source. The electron bunch was effectively compressed with the chicane magnet when the laser transverse distribution was the truncated Gaussian profile, illuminating a cathode. Moreover, the compressed electron bunch was shortened by enlarging the laser pulse width. Consequently, an enhancement of the radiated power of the THz-CUR has been indicated.
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Junphong, P., V. Ano, B. Lekprasert, D. Suwannakachorn, Thiraphat Vilaithong, and H. Wiedemann. "Bunch Compression of a Non-Relativistic 280-keV-He+ Beam." Solid State Phenomena 107 (October 2005): 59–62. http://dx.doi.org/10.4028/www.scientific.net/ssp.107.59.

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At 150 kV-pulsed neutron generator at the Fast Neutron Researh Facility is being upgraded to produce a 280-kV-pulsed-He beam for Time-of-Flight Rutherford Backscattering Spectrometry (TOF RBS). Modification are being done by replacing the existing beamline elements by a 400-kV accelerating tube, 45o-double focusing dipole magnet and quadrupole lens. The beam transport system has to be redesigned based on the new elements. The important part of a good pulsed beam depends on the pulsing system. The two main parts are the chopper and buncher. Radiofrequency (RF) of 2 MHz is used for the chopper and 4 MHz for the buncher. For the buncher the RF amplitude of 13 kV is applied to two gaps, so that the ion pulse is compressed twice. An optimized geometry for the 280-keV pulsed helium ion beam is presented in this paper,. The PARMELA code has been used to optimize the space-charge effect, resulting in a excitated pulse width of less than 2 ns at a target. The calculated distance from a buncher to the target is 4.6 m. Effects of energy spread and phase angle between the chopper and buncher have been included in the optimization of the bunch lengh.
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Dissertations / Theses on the topic "RF Pulse Compressor"

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Chatelain, Robert P. 1982. "RF compression of electron bunches applied to ultrafast electron diffraction." Thesis, McGill University, 2008. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=111943.

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The dynamics of atomic scale structures during structural change can be studied by Ultrafast Electron Diffraction (UED). The time resolution needed to reveal the fastest dynamics is 100 fs. Sub-angstrom structural resolution becomes possible with 1-1000 pC of charge necessary for diffraction pattern analysis during subtle structural changes. This combination of requirements cannot currently be realized due to the space-charge temporal broadening inherent to bunches of electrons of high fluence and short temporal duration. Simulations show that the incorporation of a specially designed Radio-Frequncy (RF) cavity into the UED apparatus removes this technical limitation. The RF cavity reverses the near linear position-momentum distribution of the temporally broadened electron bunch, causing the bunch to recompress itself as it propagates. It is found that our proposed method allows for sub-100 fs bunches with maximum charge of 0.6 pC, almost 3 orders of magnitude improvement over today's state of the art.
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Costa, Rui Jorge Duarte. "Face detection and recognision." Master's thesis, Universidade de Aveiro, 2016. http://hdl.handle.net/10773/21683.

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Mestrado em Engenharia Eletrónica e Telecomunicações
Ultimamente, as redes de telecomunicações móveis estão a exigir cada vez maiores taxas de transferência de informação. Com este aumento, embora sejam usados códigos poderosos, também aumenta a largura de banda dos sinais a transmitir, bem como a sua frequência. A maior frequência de operação, bem como a procura por sistemas mais eficientes, tem exigido progressos no que toca aos transístores utilizados nos amplificadores de potência de radio frequência (RF), uma vez que estes são componentes dominantes no rendimento de uma estação base de telecomunicações. Com esta evolução, surgem novas tecnologias de transístores, como os GaN HEMT (do inglês, Gallium Nitride High Electron Mobility Transistor). Para conseguir prever e corrigir certos efeitos dispersivos que afetam estas novas tecnologias e para obter o amplificador mais eficiente para cada transístor usado, os projetistas de amplificadores necessitam cada vez mais de um modelo que reproduza fielmente o comportamento do dispositivo. Durante este trabalho foi desenvolvido um sistema capaz de efetuar medidas pulsadas e de elevada exatidão a transístores, para que estes não sejam afetados, durante as medidas, por fenómenos de sobreaquecimento ou outro tipo de fenómenos dispersivos mais complexos presentes em algumas tecnologias. Desta forma, será possível caracterizar estes transístores para um estado pré determinado não só de temperatura, mas de todos os fenómenos presentes. Ao longo do trabalho vai ser demostrado o projeto e a construção deste sistema, incluindo a parte de potência que será o principal foco do trabalho. Foi assim possível efetuar medidas pulsadas DC-IV e de parâmetros S (do inglês, Scattering) pulsados para vários pontos de polarização. Estas últimas foram conseguidas á custa da realização de um kit de calibração TRL. O interface gráfico com o sistema foi feito em Matlab, o que torna o sistema mais fácil de operar. Com as medidas resultantes pôde ser obtida uma primeira análise acerca da eficiência, ganho e potência máxima entregue pelo dispositivo. Mais tarde, com as mesmas medidas pôde ser obtido um modelo não linear completo do dispositivo, facilitando assim o projeto de amplificadores.
Lately, the wireless networks should feature higher data rates than ever. With this rise, although very powerful codification schemes are used, the bandwidth of the transmitted signals is rising, as well as the frequency. Not only caused by this rise in frequency, but also by the growing need for more efficient systems, major advances have been made in terms of Radio Frequency (RF) Transistors that are used in Power Amplifiers (PAs), which are dominant components in terms of the total efficiency of base stations (BSS). With this evolution, new technologies of transistors are being developed, such as the Gallium Nitride High Electron Mobility Transistor (GaN HEMT). In order to predict and correct some dispersive effects that affect these new technologies and obtain the best possible amplifier for each different transistor, the designers are relying more than ever in the models of the devices. During this work, one system capable of performing very precise pulsed measurements on RF transistors was developed, so that they are not affected, during the measurements, by self-heating or other dispersive phenomena that are present in some technologies. Using these measurements it was possible to characterize these transistors for a pre-determined state of the temperature and all the other phenomena. In this document, the design and assembly of the complete system will be analysed, with special attention to the higher power component. It will be possible to measure pulsed Direct Current Current-Voltage (DC-IV) behaviour and pulsed Scattering (S) parameters of the device for many different bias points. These latter ones were possible due to the development of one TRL calibration kit. The interface with the system is made using a graphical interface designed in Matlab, which makes it easier to use. With the resulting measurements, as a first step analysis, the maximum efficiency, gain and maximum delivered power of the device can be estimated. Later, with the same measurements, the complete non-linear model of the device can be obtained, allowing the designers to produce state-of-art RF PAs.
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Book chapters on the topic "RF Pulse Compressor"

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Biegert, Jens, and Jean-Claude Diels. "Pulse Compression." In Encyclopedia of RF and Microwave Engineering. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2005. http://dx.doi.org/10.1002/0471654507.eme329.

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Conference papers on the topic "RF Pulse Compressor"

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Yakovlev, V. P. "Ferroelectric Switch For An Active RF Pulse Compressor." In HIGH ENERGY DENSITY AND HIGH POWER RF: 6th Workshop on High Energy Density and High Power RF. AIP, 2003. http://dx.doi.org/10.1063/1.1635119.

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Tantawi, Sami G. "Recent Advances in RF Pulse Compressor Systems at SLAC." In HIGH ENERGY DENSITY AND HIGH POWER RF: 6th Workshop on High Energy Density and High Power RF. AIP, 2003. http://dx.doi.org/10.1063/1.1635118.

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Vikharev, A. L. "Plasma Switch for X-Band Active SLED-II RF Pulse Compressor." In ADVANCED ACCELERATOR CONCEPTS: Eleventh Advanced Accelerator Concepts Workshop. AIP, 2004. http://dx.doi.org/10.1063/1.1842624.

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Vikharev, A. L. "High-Power Tests of a Two-Channel X-Band Active RF Pulse Compressor Using Plasma Switches." In HIGH ENERGY DENSITY AND HIGH POWER RF: 6th Workshop on High Energy Density and High Power RF. AIP, 2003. http://dx.doi.org/10.1063/1.1635120.

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Shlapakovski, Anatoli, Leonid Beilin, Moshe Donskoy, Yakov E. Krasik, and Edl Schamiloglu. "Self-consistent plasma density evolution during RF energy extraction from a microwave pulse compressor." In 2015 IEEE International Conference on Plasma Sciences (ICOPS). IEEE, 2015. http://dx.doi.org/10.1109/plasma.2015.7179958.

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Halbout, J. M., S. L. Palfrey, and D. L. Grischkowsky. "Ultrashort compression of amplified optical pulses." In OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1985. http://dx.doi.org/10.1364/oam.1985.wz1.

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We have developed an amplifier for femtosecond optical pulses that is pumped by the frequency-doubled output of a mode-locked Nd:YAG laser Q-switched at 800 Hz. We have successfully used this type of system to amplify both 100-fs output pulses from a colliding pulse mode-locked ring dye laser and 200-fs pulses obtained by compression of the output of a synchronously pumped, cavity pumped dye laser. In both cases, synchronization of the YAG laser pulses with the pulses from the dye laser is achieved by driving its acoustooptic mode-locker with a rf signal phase-locked to the optical pulse train of the dye laser. A short-term jitter of <25 ps is observed with this technique. A two-stage configuration allows amplification up to the microjoule level. We also have successfully addressed the problem of amplification of compressed optical pulses. Our primary application for this system is pulse compression in an optical fiber. The excellent mode quality of the amplified beam allows a coupling efficiency into the 4-μm fiber core of over 60%. Furthermore the very good amplitude stability enables us to obtain the highest compression ratios ever achieved on the femtosecond time scale (110 fs to 12 fs and 200 fs to 16 fs with the two systems, respectively).
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Wilson, Perry B. "RF pulse compression for future linear colliders." In Pulsed RF sources for linear colliders. AIP, 1995. http://dx.doi.org/10.1063/1.48415.

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MacInnes, P. "RF Pulse Compression Using Helically Corrugated Waveguides." In HIGH ENERGY DENSITY AND HIGH POWER RF: 7th Workshop on High Energy Density and High Power RF. AIP, 2006. http://dx.doi.org/10.1063/1.2158814.

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Lavine, Theodore L. "RF pulse compression in the NLC test accelerator at SLAC." In Pulsed RF sources for linear colliders. AIP, 1995. http://dx.doi.org/10.1063/1.48414.

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Vikharev, A. L. "Experiments on Active RF Pulse Compressors Using Plasma Switches." In HIGH ENERGY DENSITY AND HIGH POWER RF: 7th Workshop on High Energy Density and High Power RF. AIP, 2006. http://dx.doi.org/10.1063/1.2158813.

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Reports on the topic "RF Pulse Compressor"

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Hirshfield, Jay L. Quasi-Optical 34-GHz Rf Pulse Compressor. Office of Scientific and Technical Information (OSTI), June 2007. http://dx.doi.org/10.2172/908795.

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Farkas, Z. D., and J. N. Weaver. RF pulse compression development. Office of Scientific and Technical Information (OSTI), October 1987. http://dx.doi.org/10.2172/5611138.

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Tantawi, Sami. New Development in RF Pulse Compression. Office of Scientific and Technical Information (OSTI), August 2000. http://dx.doi.org/10.2172/763857.

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Wilson, P. B., Z. D. Farkas, T. L. Lavine, A. Menegat, C. Nantista, R. D. Ruth, and N. M. Kroll. Progress at SLAC on high-power rf pulse compression. Office of Scientific and Technical Information (OSTI), June 1992. http://dx.doi.org/10.2172/10137398.

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Nantista, Christopher D. ALTERNATIVE RF PULSE COMPRESSION SYSTEM CONFIGURATIONS FOR LINEAR COLLIDERS. Office of Scientific and Technical Information (OSTI), June 2002. http://dx.doi.org/10.2172/799105.

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Wilson, P. B., Z. D. Farkas, T. L. Lavine, A. Menegat, C. Nantista, R. D. Ruth, and N. M. Kroll. Progress at SLAC on high-power rf pulse compression. Office of Scientific and Technical Information (OSTI), June 1992. http://dx.doi.org/10.2172/6665078.

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Tantawi, Sami. The Next Linear Collider Test Accelerator's RF Pulse Compression and Transmission Systems. Office of Scientific and Technical Information (OSTI), February 1999. http://dx.doi.org/10.2172/10192.

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Guo, Jiquan. The Development of the Electrically Controlled High Power RF Switch and Its Application to Active RF Pulse Compression Systems. Office of Scientific and Technical Information (OSTI), December 2008. http://dx.doi.org/10.2172/953016.

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Tantawi, S. Multimoded Reflective Delay Lines and Their Application to Resonant Delay Line RF Pulse Compression Systems. Office of Scientific and Technical Information (OSTI), June 2004. http://dx.doi.org/10.2172/826970.

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Tantawi, Sami. Development of High Power X-Band Semiconductor RF Switch for Pulse Compression Systems of Future Linear Colliders. Office of Scientific and Technical Information (OSTI), November 2000. http://dx.doi.org/10.2172/784865.

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