Готові списки джерел за темами / Pulse operation mode

Добірка наукової літератури з теми "Pulse operation mode"

Автор: Grafiati

Опубліковано: 30 травня 2022

Оновлено: 31 травня 2022

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Статті в журналах з теми "Pulse operation mode"

Godun, D. V., S. V. Bordusau, and G. P. Budzko. "Output Current Control System of a High Voltage Electric Pulse Generator for Plasma Excitation." PLASMA PHYSICS AND TECHNOLOGY 6, no. 1 (2019): 7–9. http://dx.doi.org/10.14311/ppt.2019.1.7.

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A control and pulse discharge current limiting system integrated into an AC/DC converter and pulse modulator of a high voltage pulse generator have been developed. The peculiarity of such system\textquotesingle s operation is the stabilization of the power supplied to the discharge and the correction of the width of output electric pulses towards decrease upon reaching the specified pulsed current amplitude value. The system enables the pulse generator to work in the modes close to the ``short circuited load'' mode. In this case the driving module of a composite IGBT key performs the correction of the working pulse width and blocks the pulse generator operation if needed. The suggested circuit design solutions allow using the generator in a wide range of electric plasma-forming parameters' modes and working with various types of vacuum gas discharge systems.

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Zhuravlev, I. M., and A. V. Osipov. "Resonant solar cell energy converter in the power supply system for small spacecraft." Proceedings of Tomsk State University of Control Systems and Radioelectronics 23, no. 3 (September 25, 2020): 81–85. http://dx.doi.org/10.21293/1818-0442-2020-23-3-81-85.

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The operation of a solar cell resonant converter at operating modes in the power supply system of a small spacecraft is investigated. The resonant converter with pulse-code regulation simulation model has been developed, and the operation point by stabilizing charge current mode and stabilizing output voltage mode is considered. The converter regulating characteristics in various operating modes are obtained.

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Takahashi, Sadayuki, Takeshi Yano, Shinichi Hori, and Eiichi Sato. "Pulse Mode Operation for Piezoelectric Ceramic Actuator." Japanese Journal of Applied Physics 26, S2 (January 1, 1987): 180. http://dx.doi.org/10.7567/jjaps.26s2.180.

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Zhang, Liqiang, Zhiyong Pan, Zhuang Zhuo, and Yunzheng Wang. "Three Multiple-Pulse Operation States of an All-Normal-Dispersion Dissipative Soliton Fiber Laser." International Journal of Optics 2014 (2014): 1–7. http://dx.doi.org/10.1155/2014/169379.

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Multiple-pulse operation states of an all-normal-dispersion Yb-doped double-clad dissipative soliton fiber laser are investigated in this paper. The proposed laser can deliver harmonic mode-locked pulses, bound states of dissipative solitons, and dual-wavelength dual-pulses. Stable second-harmonic and third-harmonic mode-locked pulse trains are obtained with the output power of 1.39 W and 1.46 W, respectively, and the corresponding single pulse energies are 12.1 nJ and 8.5 nJ. With the adjustment of pump power and the wave plates, the fiber laser generates bound states of two or three dissipative solitons. Moreover, a dual-wavelength dual-pulse state is presented, where the output pulses from the nonlinear polarization rotation rejection port consists of the leading and trailing edges of the pulses circulating in the cavity.

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Gribacheva, V., and S. Shcherbakov. "THE COOLING SYSTEM OF THE PERIODIC PULSED REACTOR." PROBLEMS OF ATOMIC SCIENCE AND TECHNOLOGY. SERIES: NUCLEAR AND REACTOR CONSTANTS 2021, no. 2 (June 26, 2021): 256–67. http://dx.doi.org/10.55176/2414-1038-2021-2-256-267.

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The paper proposes the configuration and composition equipment of the cooling system of the designed periodic pulsed reactor (PPR) of high power. The special features of the PPR are a small flow section, a large heating of the coolant in the power pulse and the impossibility of useful use of thermal energy in the periodic mode of operation. Liquid lithium is proposed as a coolant and heat is discharged through air heat exchangers (AHE). The goal was to achieve compactness and low power consumption, the ability to work with frequent stops and optimize the operation of equipment in pulse modes. For this purpose, high-temperature AHE with a small heat exchange surface and forced air cooling are used, the circulation circuit is divided into two parts - the reactor circuit and the AHE circuit with two circulation pumps and a common drain tank. The separation of the circuit allows to independently perform the operations of starting, stopping and heating the circuits in a periodic mode. The drain tank limits the composition of the equipment exposed to temperature pulses. Numerical studies of the temperature regime of the coolant in the equipment of the PDR cooling system are carried out. The calculations were performed using the TURBOFLOW code in two-dimensional terms for all the main elements of the equipment. Quasi-stationary (nominal and partial power levels) and pulse modes of operation are considered. Calculated characteristics for forced and natural air circulation are obtained. The limits of the air circulation modes under the conditions of non-freezing of the coolant are determined. The obtained values of the maximum temperatures of the coolant: in the pulsed mode is 750 °C, in the quasi-stationary mode - 490 °C with an average power of 15 MW, air flow of 150 m3/s and the size of the AHE in the plan of 5×5 m, 100 panels of 1.08×0.025×5 m.

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Cauffman, Stephen, Monica Blank, Philipp Borchard, and Kevin Felch. "Adaptation of a Dual-Frequency 104/140 GHz Gyrotron for Operation at 175 GHz." EPJ Web of Conferences 203 (2019): 04004. http://dx.doi.org/10.1051/epjconf/201920304004.

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A dual-frequency gyrotron capable of operation in the TE28,7 cavity interaction mode at 140 GHz, or in the TE22,5 mode at 104 GHz, has been developed for use in electron cyclotron heating in the W7-X stellarator at IPP Greifswald. The gyrotron incorporates an internal converter design that has been numerically optimized to convert either of the two operating modes into a high-quality Gaussian output beam. During short-pulse factory testing, the gyrotron produced 900 kW at 140 GHz, and 520 kW at 104 GHz. After delivery to IPP, the gyrotron was conditioned to long-pulse operation at 140 GHz, demonstrating 30-minute pulses at several power levels up to 811 kW, and producing ten consecutive ten-minute pulses at 811 kW as well. After long-pulse capabilities were demonstrated at 140 GHz, IPP requested an analysis of the feasibility of operating the gyrotron (without internal modification) in an additional mode with a frequency near 175 GHz. Several potential interaction modes were evaluated to determine the required operating parameters for excitation of these modes, and to assess the expected interaction efficiency, output power, internal diffraction losses, and output beam quality. The most promising modes appear to be the TE33,9 (173 GHz) and the TE34,9 (176 GHz), which should generate 400-500 kW of RF in a suitable magnet capable of producing the necessary 7.1 T field required for operation at these higher frequencies. Because the existing gyrotron’s internal converter was not optimized for these modes, however, internal losses are expected to be higher than usual (up to 7%), and the output beam pattern will require external phase-correction in order to produce a Gaussian beam. A feasibility analysis for such external phase correction has been performed, demonstrating that a high-quality beam can be recovered using numerically synthesized external phase-correcting mirror surfaces.

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Pushkarev, A. I., Y. I. Isakova, and I. P. Khaylov. "Stabilization of ion beam generation in a diode with self-magnetic insulation in double-pulse mode." Laser and Particle Beams 33, no. 2 (April 17, 2015): 283–91. http://dx.doi.org/10.1017/s0263034615000385.

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AbstractThe paper presents the results of statistical studies of ion beam generation in different geometry diodes with explosive emission cathode in a mode of self-magnetic insulation. The experiments were carried out using the TEMP-4M pulsed ion beam accelerator during its operation in both unipolar pulse mode (100 ns, 250–300 kV) and bipolar-pulse mode with the first negative (300–600 ns, 100–150 kV) followed by a second positive (120 ns, 250–300 kV) pulse. It is found that the standard deviation of the total energy and energy density of the beam does not exceed 10–11%, while the same shot-to-shot variation in ion current density was found to be 20–30%. The mechanism of the energy density stabilization from pulse to pulse may be associated with the charge exchange between accelerated ions and stationary molecules and formation of accelerated neutrals. We observed a high correlation between the energy density (or total beam energy) and the duration of the first voltage pulse. We performed analysis of Blumlein statistical performance when the Blumlein was terminated with a resistive load and with a self-magnetically insulated ion diode. A characteristic feature of Blumlein operation in the double-pulse mode is an excellent reproducibility of breakdown of the preliminary spark gap, the variation in breakdown voltage is <2%. At the same time, the shot-to-shot variation in the breakdown voltage of the main spark gap in both bipolar- and unipolar pulse mode is 3–4 times higher than that for the preliminary spark gap. To improve the statistical performance of the main spark gap we used the first voltage pulse at the output of Blumlein to trigger the main spark gap. The new trigatron-type regime of the main spark gap operation showed a better reproducibility of the first pulse duration, with the time jitter not exceeding 10 ns in a set of 50 pulses.

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Sun, Yanwen, Franz-Josef Decker, James Turner, Sanghoon Song, Aymeric Robert, and Diling Zhu. "Pulse intensity characterization of the LCLS nanosecond double-bunch mode of operation." Journal of Synchrotron Radiation 25, no. 3 (March 27, 2018): 642–49. http://dx.doi.org/10.1107/s160057751800348x.

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The recent demonstration of the `nanosecond double-bunch' operation mode,i.e.two X-ray pulses separated in time between 0.35 and hundreds of nanoseconds and by increments of 0.35 ns, offers new opportunities to investigate ultrafast dynamics in diverse systems of interest. However, in order to reach its full potential, this mode of operation requires the precise characterization of the intensity of each X-ray pulse within each pulse pair for any time separation. Here, a transmissive single-shot diagnostic that achieves this goal for time separations larger than 0.7 ns with a precision better than 5% is presented. It also provides real-time monitoring feedback to help tune the accelerator parameters to deliver double pulse intensity distributions optimized for specific experimental goals.

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Xu, Nannan, Pengfei Ma, Shenggui Fu, Xinxin Shang, Shouzhen Jiang, Shuyun Wang, Dengwang Li, and Huanian Zhang. "Tellurene-based saturable absorber to demonstrate large-energy dissipative soliton and noise-like pulse generations." Nanophotonics 9, no. 9 (February 12, 2020): 2783–95. http://dx.doi.org/10.1515/nanoph-2019-0545.

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AbstractTwo-dimensional layered monoelemental materials (Xenes) with excellent optoelectronic properties have various property-related applications, such as energy, biomedicine, and optoelectronic devices. Xenes also show excellent performance in acting as saturable absorbers (SAs) for obtaining ultrafast laser operations. Few-layer tellurene as a typical Xenens exhibits distinct optoelectronic properties and promising practical application potential, and its nonlinear optical absorption characteristics and related ultrafast modulation applications have been investigated preliminarily. However, tellurene-based SAs to demonstrate large-energy mode-locked operations, which have special applications in industrial and scientific research areas, are seldom studied. In this work, we focus on the preparation of tellurene-based SAs and explore its applications in demonstrating large-energy mode-locked operations [dissipative soliton (DS) and noise-like pulses (NLP)]. For DS operation, the maximum average output power, pulse width, and largest pulse energy are 23.61 mW, 5.87 ps, and 1.94 nJ, respectively. NLP operation with a recorded average output power of 106.6 mW and a pulse energy of 8.76 nJ is also generated, which shows significant enhancement in comparison to previously reported Xenes-based works. Our contribution reveals the great potential and capacity of tellurene-based SAs in obtaining large-energy pulse operations and further promotes the explorative investigation of Xenes-based optoelectronic devices.

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Popova, L. I., S. K. Andreev, V. K. Gueorguiev, and N. D. Stoyanov. "Pulse mode of operation of diode humidity sensors." Sensors and Actuators B: Chemical 37, no. 1-2 (November 1996): 1–5. http://dx.doi.org/10.1016/s0925-4005(97)80065-2.

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Дисертації з теми "Pulse operation mode"

Rasmeni, Sibusiso Wiseman. "Simulation of the switched reluctance machine under single pulse mode operation." Thesis, Stellenbosch : Stellenbosch University, 2003. http://hdl.handle.net/10019.1/53590.

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Thesis (MScEng)--University of Stellenbosch, 2003.
ENGLISH ABSTRACT: Two distinct simulation methods have been developed to simulate the single and the multi-phase excited current waveforms of the switched reluctance machine (SRM) under single pulse mode operation. These simulation methods are explained and evaluated in this thesis. A non-commercial finite element package that takes the SRM's nonlinear magnetic property into account is used in this regard. The simulation program uses the finite element solution directly during the simulation. Both simulation methods have been investigated in terms of result and total simulation time. In this investigation it is shown how feasible the simulation methods will be with the next generation of fast computers. The factors affecting the simulated current waveforms of the SRM under single pulse mode operation are investigated in detail in this thesis. With these factors taken into account, the measured and simulated multi-phase current waveforms are compared with each other and discussed.
AFRIKAANSE OPSOMMING: Twee verskillende simulasie metodes is ontwikkel om die enkel- en multi-fase stroomgolfvorms van die geskakelde reluktansiemasjien (GRM) onder enkelpulsmodus-werking te simuleer. In hierdie tesis word hierdie simulasie metodes verduidelik en geëvalueer. 'n Nie-kommersiële eindige element pakket wat die nielinieêre magnetiese eienskap van die GRM in ag neem is in hierdie verband gebruik. Die simulasie program gebruik die eindige-element oplossing direk gedurende die simulasie. Beide simulasie metodes is ondersoek in terme van resultaat en simulasietyd. In hierdie ondersoek word getoon hoe uitvoerbaar hierdie tipe simulasie metodes gaan wees met die volgende hoë spoed generasie rekenaars. Die faktore wat die gesimuleerde stroomgolfvorms van die GRM onder enkelpulsmodus-werking beïnvloed word deeglik in hierdie tesis ondersoek. Met hierdie faktore in ag geneem word die gemete en gesimuleerde multi-fase stroomgolfvorms met mekaar vergelyk en bespreek.

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Matos, Antonio P. "Characterization and application of four-layer semiconductor structures in pulse mode operation." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2006. http://library.nps.navy.mil/uhtbin/hyperion/06Sep%5FMatos.pdf.

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Thesis (M.S. in Physics)--Naval Postgraduate School, September 2006.
Thesis Advisor(s): Gamani Karunasiri, James H. Luscombe. "September 2006." Includes bibliographical references (p. 69-70). Also available in print.

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Atkinson, Terry. "Modeling of magnetic optic for the short pulse mode operation of Energy Recovery Linac based light sources." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät, 2015. http://dx.doi.org/10.18452/17300.

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Das Forschungsfeld der Synchrotronstrahlungsquellen hat sich in den letzen Jahren entscheidend weiterentwickelt. Alle Zukunftsideen, unabhängig von ihrer Komplexität, haben dennoch eines gemeinsam: die Erzeugung kurzer Pulse. Die Naturwissenschaften haben die Spitzenbrillanz, die mit Hilfe kürzester Pulse produziert werden kann, als neues Schlüsselwerkzeug entdeckt. Die Nutzergemeinschaft verlangt nicht mehr nur ein statisches Bild, sondern vielmehr eine Reihe von bewegten Aufnahmen atomarer Substrukturen und den dazugehöringen Prozessen. Existierende dritte Generation Synchrotronstrahlungsquellen werden an die neuen Herausforderungen angepasst: Verbesserungen an der Magnet-Optik sowie der Einbau modernster Beschleunigertechnologie ermöglichen die Erzeugung kürzester Pulse mit höchster Brillanz für zeitaufgelöste Experimente. Ein möglicher Kandidat für die Lichtquelle der nächsten Generation ist ein Linear-Beschleuniger mit Energierückgewinnung. Durch die Verwendung langer Beschleunigungsstrukturen kann es, selbst bei hohen Energien, nicht zur Ausbildung des Emittanzgleichgewichts wie in Speicherringen kommen. Durch die Verwendung Impulsabhängiger-Umlaufbahnen und der Rückgewinnung der Strahlenergie ist es mit `Energy Recovery Linac'' (ERL)-basierten Quellen energieeffizient möglich, hochenergetische Elektronen-Pulse im Femtosekundenbereich zu erzeugen. Die longitudinale Elekronstrahldynamik solcher ERLs ist eines der Hauptthemen dieser Arbeit. Umfangreiche Simulationen über die gesamte Maschine wurden im Rahmen der `Femto-Science Factory'' Lichtquellen Studie durchgeführt. Die Begrenzungen des Kurzpulsmodus Betriebes wurden untersucht und mit den Erwartungen verglichen. Besondere Aufmerksamkeit lag dabei auf den 6D Elektronenstrahleigenschaften, insbesondere auf der Vermeidung von Strahlaufweitungen, die mit der Erzeugung von Ultra-Kurzpulsen einhergehen können.
Synchrotron light sources are entering a new era. No matter how elaborate, all the next generation proposals share a common necessity; the production of ultra-short electron bunches. There is an evolution in the field of science under investigation using the high peak brilliance generated from such bunches. The user community is demanding not just pictures but videos of atomic substructures and the processes that define them. Existing 3rd generation facilities are modifying their magnetic lattices and upgrading the acceleration schemes in order to keep up with this trend of generating short pulses with ultimate brilliance for time resolved experiments. A possible candidate for the next generation light source is one based on ERL technology. Using long linacs to accelerate to high energies overcomes the present limitation of emittance equilibrium in storage rings. By implementing independent arcs for acceleration and deceleration while recuperating the beams energy, ERL based sources are theoretically capable of efficiently producing high energy femtosecond long bunch lengths. The study of the longitudinal motion of the beam through single pass magnetic optic in combination with linacs is the main topic of this thesis. Dedicated start-to-end simulations in the framework of the Femto-Science Factory large scale light source are undertaken. The expectations and restrictions on the short pulse mode (SPM) operation are comprehensively examined in this work. Particular attention is given to the 6D electron beam properties and with it the beam degradation caused by the production of ultra-short bunches.

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Atkinson, Terry [Verfasser], Alexander [Akademischer Betreuer] Matveenko, Eberhard [Akademischer Betreuer] Jaeschke, and Kurt [Akademischer Betreuer] Aulenbacher. "Modeling of magnetic optic for theshort pulse mode operation of Energy Recovery Linac based light sources / Terry Atkinson. Gutachter: Alexander Matveenko ; Eberhard Jaeschke ; Kurt Aulenbacher." Berlin : Mathematisch-Naturwissenschaftliche Fakultät, 2015. http://d-nb.info/1077244320/34.

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Yagci, Mahmut Emre. "Development Of A Picosecond Pulsed Mode-locked Fiber Laser." Master's thesis, METU, 2013. http://etd.lib.metu.edu.tr/upload/12615773/index.pdf.

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Fiber lasers represent the state-of-the-art in laser technology and hold great promise for a wide range of applications because they have a minimum of exposed optical interfaces, very high efficiency, and are capable of exceptional beam quality. In the near future, the most important markets such as micromachining, automotive, biomedical and military applications will begin to use this technology. The scope of this thesis is to design and develop a short picosecond pulsed fiber laser using rare-earth doped fiber as a gain medium. The proposed master oscillator power amplifier (MOPA) will be used to generate pulses with high repetition rates. In this study, first we explain the basic theoretical background of nonlinear optics and fiber laser. Then, the numerical simulation will be introduced to explain how the laser system design and optimization. The simulation is based on nonlinear Schrö
dinger equation with the method of split-step evaluation. The brief theoretical background and simulation results of the laser system will be shown. Finally, the experimental study of the developmental fiber laser system that comprises an oscillator, preamplifier and power amplifier will be discussed.

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Тугай, Сергій Борисович. "Імпульсні режими роботи технологічних електронно-променевих гармат високовольтного тліючого розряду". Doctoral thesis, Київ, 2013. https://ela.kpi.ua/handle/123456789/6373.

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Tang, Wei-Hao, and 湯幃皓. "Study and Application of Piezoelectric Pulse-wave Energy Harvester Skin Patch Operating in 3-1, 3-3 Mode." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/98p99e.

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碩士
國立臺灣大學
工程科學及海洋工程學研究所
106
Due to the growing population with chronic diseases in aging society, the expenses of healthcare increases dramatically. Thus, wearable devices gradually prosper for the purpose of health condition monitoring to reduce healthcare expenses. However, if these sensor devices are powered by batteries, they will cause the limited service time and environmental impact. In order to extend the service time of batteries, or even replace them, many researchers have been studied on transforming the dynamic energy from human motion into electrical energy. Due to the popularity of the wristband-type devices and regular pulse from human arterial pulse, this study is based on harvesting the energy from arterial pulse. The piezoelectric material is chosen to fabricate the energy harvester because of its high electromechanical coupling factor. The bridge-type pulse wave energy harvester (EH) is made by commercial PZT. With the optimized fabrication process of aerosol deposition method, annealing, and poling of PZT thin film by our previous study, the output performances between soft-type (AC750) and hard-type (MPT) PZT, between {3-1} and {3-3} mode are compared, which will further be confirmed by numerical simulation. The experimental results show when operating in {3-1} mode, AC750 and MPT bimorph EH with same dimension generate the maximum voltage of 71.1 mV and 104.8 mV under an optimal load when measuring pulse-wave. The corresponding instantaneous power are 5.05 nW and 13.4 nW. When in {3-3} mode, MPT unimorph EH generates the maximum voltage of 190 mV and 4.4 nW. The output power hasn’t achieved to certain level so far, but it still shows the potential application of pulse-wave EH.

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Vereshchago, Eugen, Vitalii Kostiuchenko, and Andrii Hrieshnov. "Calculation and analysis of dynamic properties of a soft switching converter under operation on the arc load." Thesis, 2020. http://eir.nuos.edu.ua/xmlui/handle/123456789/5025.

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Vereshchago, E. Calculation and analysis of dynamic properties of a soft switching converter under operation on the arc load / E. Vereshchago, V. Kostiuchenko, A. Hrieshnov // 40th Intern. Conf. on Electronics and Nanotechnology (ELNANO). – Kyiv : IEEE, 2020. – P. 820–825.
The processes in the converter with soft switching transistors operating on an arc load are investigated. A comparative analysis of the calculated frequency characteristics of a PWM converter in normal operation with the characteristics of its linear model is presented. The features of calculating the equivalent frequency characteristics of the loop gain of switching devices are considered. The dynamic resistance of a switching power supply is estimated.

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Книги з теми "Pulse operation mode"

Wright, A. G. Linear performance. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780199565092.003.0009.

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This chapter is concerned with a single consideration: the degree of proportionality between a light signal and its resulting electrical output. This is formally referred to as linearity, which depends on the suitability of the chosen PMT and the mode of operation (pulsed or analogue). Applications fall into two groups: analogue operation (DC) and transient applications. Linearity in a pulsed mode of operation concerns both pulse height (charge) and the rate of events. Generally, in the DC mode, only the mean anode current is relevant. Methods for determining both forms of non-linearity are presented, based on actual measurements. Test methods using multiple light sources, bootstrapping, single step (piggyback), and shot noise are investigated. A method for uncovering non-linearity in high-Z scintillators by using coincident gamma emissions (60Co) is demonstrated. An analytical means for correcting results at the 1 % level is provided.

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(Editor), Jun Ye, and Steven T. Cundiff (Editor), eds. Femtosecond Optical Frequency Comb: Principle, Operation and Applications. Springer, 2004.

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The Arccos and Lommel Diffraction Formulations: An Approximate Fourier Transform Pair Leading to A Unified Theory of Spatially Averaged Diffraction Corrections for Ultrasonic Piston Transducers Operating in Pulsed Mode. Storming Media, 1998.

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Shore, Bruce W. Our Changing Views of Photons. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780198862857.001.0001.

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This book describes the changing views of the physics community toward photons, and how photons are viewed today in several contexts. The first portion, a ninechapter Memoir with few equations and many definitions, explains the changing view of physicists toward radiation and its wave-particle photons, written for those with interest but possibly without technical background. It gives operational definitions that have been used for photons and their association with quantum-state manipulations that include Quantum Information, astronomical sources and crowds of photons, the boxed fields of cavity Quantum Electrodynamics It defines, qualitatively, the historical photons of Planck, Einstein, Compton, and Bohr, the later photons of Dirac, Feynman, and Glauber, and the photon constituents of the Standard Model of Particle Physics. It points to contemporary photons as causers of change to atoms, as carriers of messages, and as subject to controllable creation and alteration. A second portion, of three tutorial appendices, explains the mathematical background of quantum theory and radiation needed by those whose profession involves photonics and who therefore want more detailed understanding of the Memoir portion: quantum theory and the Schrodinger equation for quantum-state manipulation; Maxwell equations for electromagnetism with wave modes that become photons through a quantization postulate, possibly exhibiting quantum entanglement; and the coupling of atoms and fields to create quasiparticles that are seen as slow and stored light pulses. As with other Memoirs, the present book has idiosyncrasies of the author. Most notably, on the opening page of each chapter, and at the end of the book, is a cartoon drawn by the author, as a grad student, that reflects the changing views of a PhD aspirant toward the grad school experience as he progressed through the graduate school of MIT in the 1950s.

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Частини книг з теми "Pulse operation mode"

Burghardt, B., W. Mückenheim, and D. Basting. "Single-Mode Operation of Pulsed Dye Lasers." In Laser Spectroscopy VIII, 430–31. Berlin, Heidelberg: Springer Berlin Heidelberg, 1987. http://dx.doi.org/10.1007/978-3-540-47973-4_137.

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Hashimoto, Kengo. "Subcriticality." In Accelerator-Driven System at Kyoto University Critical Assembly, 13–49. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-0344-0_2.

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AbstractFor a subcritical reactor system driven by a periodically pulsed spallation neutron source in KUCA, the Feynman-α and the Rossi-α neutron correlation analyses are conducted to determine the prompt neutron decay constant and quantitatively to confirm a non-Poisson character of the neutron source. The decay constant determined from the present Feynman-α analysis well agrees with that from a previous analysis for the same subcritical system driven by an inherent source. Considering the effect of a higher mode excited, the disagreement can be successfully resolved. The power spectral analysis on frequency domain is also carried out. Not only the cross-power but also the auto-power spectral density have a considerable correlated component even at a deeply subcritical state, where no correlated component could be previously observed under a 14 MeV neutron source. The indicator of the non-Poisson character of the present spallation source can be obtained from the spectral analysis and is consistent with that from the Rossi-α analysis. An experimental technique based on an accelerator-beam trip or restart operation is proposed to determine the subcritical reactivity of ADS. Applying the least-squares inverse kinetics method to the data analysis, the subcriticality can be inferred from time-sequence neutron count data after these operations.

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Kim, Kwang-Suk, Jeong-Moog Kim, Seung-Kyu Park, Seung-Hoon Lee, and Cheol-Jung Kim. "Mixed Operation of CW and Pulsed Modes in Solid-State Laser for Medical Applications." In Laser in der Medizin / Laser in Medicine, 530–33. Berlin, Heidelberg: Springer Berlin Heidelberg, 1996. http://dx.doi.org/10.1007/978-3-642-80264-5_126.

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Wang, H., D. Dopheide, and V. Strunck. "Experimental Investigation of the Optical Characteristics of Diode Lasers in CW- and High-Frequency Pulsed Operation Modes for LDA Applications." In Laser in der Technik / Laser in Engineering, 313–19. Berlin, Heidelberg: Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/978-3-662-08251-5_73.

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"Synthesis of Sequential Circuits for Operation in Pulse Mode." In The Principles of Switching Circuits. The MIT Press, 2003. http://dx.doi.org/10.7551/mitpress/5564.003.0008.

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Pljonkin, A. P. "Vulnerability of the Synchronization Process in the Quantum Key Distribution System." In Research Anthology on Advancements in Quantum Technology, 345–54. IGI Global, 2021. http://dx.doi.org/10.4018/978-1-7998-8593-1.ch015.

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A typical structure of an auto-compensation system for quantum key distribution is given. The principle of operation of a fiber-optic system for the distribution of quantum keys with phase coding of photon states is described. The operation of the system in the synchronization mode and the formation of quantum keys was investigated. The process of detecting a time interval with an optical synchronization pulse is analyzed. The structural scheme of the experimental stand of the quantum-cryptographic network is given. Data are obtained that attest to the presence of a multiphoton signal during the transmission of sync pulses from the transceiver station to the coding and backward direction. The results of experimental studies are presented, which prove the existence of a vulnerability in the process of synchronization of the quantum key distribution system. It is shown that the use of a multiphoton optical pulse as a sync signal makes it possible for an attacker to unauthorized access to a quantum communication channel. The experimental results show that tapping a portion of the optical power from the quantum communication channel during the synchronization process allows an attacker to remain unnoticed while the quantum protocol is operating. Experimentally proved the possibility of introducing malfunctions into the operation of the quantum communication system at the stage of key formation, while remaining invisible for control means.

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Valtchev, Stanimir, and Svilen S. Valtchev. "Control for the Contactless Series Resonant Energy Converter." In Emerging Capabilities and Applications of Wireless Power Transfer, 102–40. IGI Global, 2019. http://dx.doi.org/10.4018/978-1-5225-5870-5.ch005.

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This chapter presents control methods applied in the operation of the series loaded series resonant (SLSR) power converters in a most efficient operation zone. The choice of the control method is affected by the objective to guarantee suitably the efficiency, being this method in the same time, relatively easy to apply. The first part of the chapter compares three basic principles of regulation: frequency mode (FM), pulse width mode (PWM), and their combination (PWM/FM). Finally, a new method for instantaneous regulation is developed. The proposed technique consists of a simplified observation of a state variable value to limit each portion of supplied energy, depending on the requirement for power in each half period. The result of this regulation is comparable to the current mode (CM) control applied to the hard-switching power converters. The viability of this new regulation method is demonstrated by simulations of its analogue circuit implementations and experimentally proved. The circuit is also prepared for the changes in the magnetic coupling (contactless energy transfer).

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J. Zhang, Jian. "In Search of Optimal Laser Settings for Lithotripsy by Numerical Response Surfaces of Ablation and Retropulsion." In Response Surface Methodology in Engineering Science [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.96271.

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Even though ureteroscopic laser lithotripsy (URSL) has become the preferred treatment option for urolithiasis due to shorter operation time and a better stone-free rate, the optimum laser pulse settings for URSL with the shortest operative times remain unknown. In this chapter, two sets of design of experiments (DOE) were conducted with response surface methodology: 1) the quantitative responses of calculus ablation and retropulsion in terms of the pulse energy, pulse width, and the number of pulses of a prototype Chromium (Cr3+), Thulium (Tm3+), Holmium (Ho3+) triple doped yttrium aluminum garnet (CTH:YAG) laser system. The ablation or retropulsion is inversely proportional to the pulse width, and the pulse width has a higher impact coefficient for the ablation than for the retropulsion. The quadratic fit of the response surface for the volume of ablation has a nonlinear relationship with the pulse width and number of pulses. 2) the laser setting optimization of laser lithotripsy of a commercially available CTH: YAG laser system. The experimental setup is based on a benchtop model first introduced by Sroka’s group. Comparing to frequency, the laser pulse energy or peak power has a higher impact coefficient to stone retropulsion as compared to stone ablation in CTH: YAG laser lithotripsy. The most efficient way to curtail stone retropulsion during laser lithotripsy is to lower the laser pulse peak power.

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Mohapatra, Mohamayee, and Chitti Babu Baladhandautham. "Implementation of Improved Control Strategy of DC-AC Converter using Delta-Sigma Modulator." In Smart Grid as a Solution for Renewable and Efficient Energy, 249–72. IGI Global, 2016. http://dx.doi.org/10.4018/978-1-5225-0072-8.ch011.

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This Chapter presents a comparative study between two current control techniques, namely, conventional Delta Modulator and novel Delta-Sigma Modulator. The use of Delta modulator in variable speed drives poses a problem of noise while converting analog signal in to digital form; to optimize Pulse Width Modulated (PWM) inverter waveforms on-line without any optimization process. But in the Delta-Sigma Modulator the noise varies. It can be successfully applied to over-sampling digital-to-analog and analog-to-digital data converters, switch mode power supplies and inverters It is easy to implement, smooth inverter operation and provides low harmonics at the inverter output. The comparative study between the above said current controllers has been verified by the MATLAB computer simulation in terms of the high frequency power spectra, average switching frequency, rms current error and total harmonic distortion of load current waveforms. The obtained theoretical results are validated with experimental platform based on TMS320F2812 digital signal processor for effectiveness of the study.

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Haidar Shahine, Mike. "Neuromorphic Photonics." In Optoelectronics [Working Title]. IntechOpen, 2020. http://dx.doi.org/10.5772/intechopen.94297.

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Neuromorphic photonic applies concepts extracted from neuroscience to develop photonic devices behaving like neural systems and achieve brain-like information processing capacity and efficiency. This new field combines the advantages of photonics and neuromorphic architectures to build systems with high efficiency, high interconnectivity and paves the way to ultrafast, power efficient and low cost and complex signal processing. We explore the use of semiconductor lasers with optoelectronic feedback operating in self-pulsating mode as photonic neuron that can deliver flexible control schemes with narrow optical pulses of less than 30 ps pulse width, with adjustable pulse intervals of −2 ps/mA to accommodate specific Pulse Position Modulation (PPM) coding of events to trigger photonic neuron firing as required. The analyses cover in addition to self-pulsation performance and controls, the phase noise and jitter characteristics of such solution.

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Тези доповідей конференцій з теми "Pulse operation mode"

Chepusov, A. S., A. A. Komarskiy, S. R. Korzhenevskiy, and O. D. Krasniy. "Study of field electron emission properties of commercial graphite cathodes in pulse-repetitive mode." In VIII Information school of a young scientist. Central Scientific Library of the Urals Branch of the Russian Academy of Sciences, 2020. http://dx.doi.org/10.32460/ishmu-2020-8-0007.

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The article considers field emission cathodes from industrial graphites MG, MPG-7, and GMZ operated in the pulse-periodic mode with the pulse repetitionrate of 1 to 30 Hz. The operation of field emitters in the pulsed mode differs from operation at a constant voltage. Under stabilization of the high potential level, the amplitude of the pulses of the emission current decreases that leads to increasing the operating voltage in the pulsed mode. During operation of the graphite cathode (when the pulse current is recorded), the operating voltage at the anode stabilizes and oscillates within 5%. Operation in the direct current mode under similar conditions is accompanied by a change in the voltage value by more than 10 %.

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Lee, Shinwook, Dimitrios Mandridis, and Peter J. Delfyett. "Mode-locked eXtreme Chirped Pulse Oscillator (XCPO) Operation in the eXtreme Chirped Pulse Regime." In LEOS 2007 - IEEE Lasers and Electro-Optics Society Annual Meeting. IEEE, 2007. http://dx.doi.org/10.1109/leos.2007.4382637.

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Hardtdegen, A., F. Cuppers, M. von Witzleben, U. Bottger, S. Menzel, R. Waser, and S. Hoffmann-Eifert. "Characterization of HfO2/TiOx ReRAM Cells in Pulse Operation Mode." In 2018 IEEE 18th International Conference on Nanotechnology (IEEE-NANO). IEEE, 2018. http://dx.doi.org/10.1109/nano.2018.8626314.

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Yang, L. Zh, Y. C. Wang, G. F. Chen, Y. Sh Wang, and W. Zhao. "Multi-pulse operation of Yb3+-doped fiber mode-locked laser." In 27th International congress on High-Speed Photography and Photonics, edited by Xun Hou, Wei Zhao, and Baoli Yao. SPIE, 2007. http://dx.doi.org/10.1117/12.725385.

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Pasini, Angelo, Giovanni Pace, and Lucio Torre. "Pulse Mode Operation of a 1 N 98% Hydrogen Peroxide Thruster." In 51st AIAA/SAE/ASEE Joint Propulsion Conference. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2015. http://dx.doi.org/10.2514/6.2015-4057.

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Min, Gao. "Improving the conversion efficiency of thermoelectric generators through “pulse mode” operation." In 9TH EUROPEAN CONFERENCE ON THERMOELECTRICS: ECT2011. AIP, 2012. http://dx.doi.org/10.1063/1.4731592.

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Plinski, Edward F., B. W. Majewski, A. S. Bednarczyk, and Krzysztof M. Abramski. "Pulse-mode operation of an rf-excited CO 2 waveguide laser." In Twelfth International Symposium on Gas Flow and Chemical Lasers and High-Power Laser Conference. SPIE, 1998. http://dx.doi.org/10.1117/12.334478.

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Zackharchenko, V. D., and O. V. Pak. "Potential of radar pulse strobing scheme use in phase-sensitive operation mode." In 2017 Radiation and Scattering of Electromagnetic Waves (RSEMW). IEEE, 2017. http://dx.doi.org/10.1109/rsemw.2017.8103641.

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Zhang, Junling, Xiaoyun Feng, Ke Li, Jun Zheng, and Dandan Huang. "Mode of short-circuit state operation in 24-pulse uncontrolled bridge rectifier." In 2009 International Conference on Electrical Machines and Systems (ICEMS). IEEE, 2009. http://dx.doi.org/10.1109/icems.2009.5382955.

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Czyszanowski, Tomasz, Robert P. Sarzala, Maciej Dems, Michal Wasiak, Wlodzimierz Nakwaski, and Krassimir Panajotov. "Pulse-regime single-mode operation of antiwaveguide photonic-crystal 1300-nm VCSEL." In SPIE Photonics Europe, edited by Krassimir Panajotov, Marc Sciamanna, Angel A. Valle, and Rainer Michalzik. SPIE, 2010. http://dx.doi.org/10.1117/12.854067.

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Звіти організацій з теми "Pulse operation mode"

Medley, S. S. ,. PPPL. Operation of the TFTR Pellet Charge Exchange Diagnostic in the Pulse Counting Mode during H+ RF-minority Heating. Office of Scientific and Technical Information (OSTI), May 1998. http://dx.doi.org/10.2172/289901.

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Yamamoto Junji, D. J. Massoletti, D. W. Heikkinen, and Kenji Sumita. Operation in pulsed mode at RTNS-II. Office of Scientific and Technical Information (OSTI), September 1987. http://dx.doi.org/10.2172/6380914.

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