Littérature scientifique sur le sujet « Compact clock »
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Articles de revues sur le sujet "Compact clock"
Khabarova, Ksenia, Denis Kryuchkov, Alexander Borisenko, Ilia Zalivako, Ilya Semerikov, Mikhail Aksenov, Ivan Sherstov, Timur Abbasov, Anton Tausenev et Nikolay Kolachevsky. « Toward a New Generation of Compact Transportable Yb+ Optical Clocks ». Symmetry 14, no 10 (20 octobre 2022) : 2213. http://dx.doi.org/10.3390/sym14102213.
Texte intégralGellesch, Markus, Jonathan Jones, Richard Barron, Alok Singh, Qiushuo Sun, Kai Bongs et Yeshpal Singh. « Transportable optical atomic clocks for use in out-of-the-lab environments ». Advanced Optical Technologies 9, no 5 (26 novembre 2020) : 313–25. http://dx.doi.org/10.1515/aot-2020-0023.
Texte intégralLiu, Xiaochi, Ning Ru, Junyi Duan, Peter Yun, Minghao Yao et Jifeng Qu. « High-performance coherent population trapping clock based on laser-cooled atoms ». Chinese Physics B 31, no 4 (1 mars 2022) : 043201. http://dx.doi.org/10.1088/1674-1056/ac2d21.
Texte intégralYun, Peter, Sinda Mejri, Francois Tricot, Moustafa Abdel Hafiz, Rodolphe Boudot, Emeric de Clercq et Stéphane Guérandel. « Double-modulation CPT cesium compact clock ». Journal of Physics : Conference Series 723 (juin 2016) : 012012. http://dx.doi.org/10.1088/1742-6596/723/1/012012.
Texte intégralPechoneri, R. D., S. T. Müller, C. Bueno, V. S. Bagnato et D. V. Magalhães. « Portable compact cold atoms clock topology ». Journal of Physics : Conference Series 733 (juillet 2016) : 012049. http://dx.doi.org/10.1088/1742-6596/733/1/012049.
Texte intégralAhmed, Mushtaq, Daniel V. Magalhães, Aida Bebeachibuli, Stella T. Müller, Renato F. Alves, Tiago A. Ortega, John Weiner et Vanderlei S. Bagnato. « The Brazilian time and frequency atomic standards program ». Anais da Academia Brasileira de Ciências 80, no 2 (juin 2008) : 217–52. http://dx.doi.org/10.1590/s0001-37652008000200002.
Texte intégralLUO, ZHIHONG, YEUNG ON AU, BENJAMIN LAU et HENRY LAW. « A 0.0052 mm2 COMPACT DIGITAL PLL IN 65 nm CMOS ». Journal of Circuits, Systems and Computers 21, no 08 (décembre 2012) : 1240026. http://dx.doi.org/10.1142/s0218126612400269.
Texte intégralGubin, M. A., A. N. Kireev, A. V. Konyashchenko, P. G. Kryukov, A. V. Tausenev, D. A. Tyurikov et A. S. Shelkovnikov. « Realisation of a compact methane optical clock ». Quantum Electronics 38, no 7 (31 juillet 2008) : 613–14. http://dx.doi.org/10.1070/qe2008v038n07abeh013914.
Texte intégralKim, Seungjun, Junghoon Jin et Jongsun Kim. « A Cost-Effective and Compact All-Digital Dual-Loop Jitter Attenuator for Built-Off-Test Applications ». Electronics 11, no 21 (7 novembre 2022) : 3630. http://dx.doi.org/10.3390/electronics11213630.
Texte intégralHoang, Anh The, Ziyu Shen, Kuangchao Wu, An Ning et Wenbin Shen. « Test of Determining Geopotential Difference between Two Sites at Wuhan Based on Optical Clocks’ Frequency Comparisons ». Remote Sensing 14, no 19 (28 septembre 2022) : 4850. http://dx.doi.org/10.3390/rs14194850.
Texte intégralThèses sur le sujet "Compact clock"
GOZZELINO, MICHELE. « Pulsed rubidium clock towards space applications ». Doctoral thesis, Politecnico di Torino, 2020. http://hdl.handle.net/11583/2836782.
Texte intégralBomstad, Wayne Roger. « An ultra-compact antenna test system and its analysis in the context of wireless clock distribution ». [Gainesville, Fla.] : University of Florida, 2002. http://purl.fcla.edu/fcla/etd/UFE0000507.
Texte intégralTrémine, Stéphane. « Etude du refroidissement laser d'atomes de césium 133 dans un champ de speckle 3D et réalisation d'une horloge atomique compacte ». Thesis, Paris 6, 2016. http://www.theses.fr/2016PA066133/document.
Texte intégralThe HORACE project consists in the development of a high-performance compact atomic clock based on isotropic laser cooling of 133Cs atoms, targeting the needs for on-board clocks. In order to minimize the clock size, the entire clock sequence is performed inside one interaction zone only, including atomic cooling, preparation, interrogation and detection. This is made possible with a microwave interrogation cavity that is both resonant at the clock transition frequency, and used as an integrating sphere for the cooling light as well. This thesis work is mainly dedicated to the experimental study of the atomic cooling in the 3D speckle field generated inside the cavity. By limiting the cooling sequence to a capture phase, about 3x108 atoms can be cooled to kinetic temperatures lower than 60 microkelvins. Besides, we show that an inhomogeneous optical energy repartition in the cavity leads us to perform the sub-Doppler cooling phase in 2 steps. Despite random polarization change from one speckle grain to another, the atomic cooling dynamics observed in the sub-Doppler regime is similar to the one observed in conventional optical lattices. The last part of this thesis is devoted to the metrological aspect where the entire clock sequence is demonstrated for the first time at the same place. The fractional frequency stability of 2x10-13-1/2 should be reached on Earth
Kroemer, Eric. « Etude du déplacement collisionnel de la fréquence d'horloge du césium en présence du gaz tampon hélium ou xénon. Applications pour microcellules à haute température ». Thesis, Besançon, 2015. http://www.theses.fr/2015BESA2047/document.
Texte intégralThis thesis presents a study on collisional shift of cesium clock frequency in the presence of helium or xenon buffer gas. Introduction of buffer gas in alkaline vapour cells is necessary to narrow the CPT line-width by Dicke effect. Nevertheless, buffer gas induces a quadratic shift of the clock frequency versus temperature cell. Cancellation of collisional shift temperature dependence is possible at a so-called inversion temperature depending on the buffer gas ratio. This inversion temperature is great working point for micro atomic clocks. This temperature is required to be 90 or even 100 °C, especially to work in harsh environmental constraints. We measured collisional shift coefficients of cesium clock frequency in presence of helium buffer gas and we determined for the first time the value of the quadratic coefficient. About xenon buffer gas, the measurement of collisional shift coefficients is more difficult because of non-expected cubic behavior of collisional clock frequency shift which could be linked to the interaction with van der Waals molecules. We established that a neon-helium buffer gas mixture could allow an inversion temperature superior to more than 80 °C. Inversion temperatures from 89 to 94 °C are measured in cesium vapor microcells filled with a mixture containing a few percent of helium
Muller, Stella Torres. « Padrão de frequência compacto ». Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/76/76132/tde-11052010-154900/.
Texte intégralWe present some relevant aspects for the construction and characterization of a compact primary frequency standard. In this system, the atomic ensemble is prepared with a magnetooptical trap. Once a significant number of cold atoms is obtained, the laser beams are turned off and, during the free expansion, the cloud is submitted to a sequence of two microwave pulses, characterizing the well-known Ramsey method. The microwave pulses are applied in a microwave cavity that was sculpted inside the vacuum chamber. All the working cycle takes place into this cavity. When the atoms are interrogated by two pulses of τ = 1 ms separated by Τ = 8 ms, the linewidth of the central fringe is 52 Hz and a short-term stability 10-13 is observed. Some frequency shifts were evaluated.
Reinhard, Friedemann. « Design and construction of an atomic clock on an atom chip ». Paris 6, 2009. https://tel.archives-ouvertes.fr/tel-00414386.
Texte intégralVon, Bandel Nicolas. « Development and study of low noise laser diodes emitting at 894 nm for compact cesium atomic clocks ». Thesis, Montpellier, 2017. http://www.theses.fr/2017MONTS003/document.
Texte intégralThis PhD work deals with the design, the fabrication and the study of high-coherence semiconductor laser sources emitting at 894 nm, for application to compact, optically-pumped cesium atomic clocks in an industrial context. We are particularly interested in the electrically pumped "Distributed-Feedback" in-plane laser diodes (DFB). The aim is to obtain a low-threshold, single-mode laser with high optical efficiency and a linewidth of less than 1 MHz. We first deal with the design and first-order characterization of the DFB diodes until they are put into modules for the clock. We then carry out an in-depth study of the physical properties of the laser emission in terms of coherence time. For that purpose, a new universal method for characterizing the optical frequency noise is introduced. Finally, we look further into the spectral properties of the emission in a servo configuration on a fluorescence line of the cesium ("Dither-Locking"). We show that the intrinsic properties of the component satisfy the requirements of the industrial system as defined in the study
Tricot, Francois. « Analyse et réduction des sources d'instabilitè de fréquence dans une horloge CPT compacte ». Thesis, Sorbonne université, 2018. http://www.theses.fr/2018SORUS037/document.
Texte intégralThis thesis work has been granted by a CIFRE-Défense contract to study the frequency stabilities of an atomic clock based on coherent population trapping. The objective is to demonstrate a frequency stability in the range of 10-13 tau-1/2 up to 10 000 s. A caesium vapour cell is used with a high-contrast excitation scheme using cross linear polarisations and a Ramsey interrogation. The short-term frequency stability is presented with the reduction of the phase and the laser power noise, both limiting clock performance at 1 s integration time. The optimisation of the microwave chain with a new local oscillator, and the implementation of a very low noise power lock loop have improved the frequency stability down to 2,3x10-13 at 1 s integration time. The fluctuations analysis of the operating parameters (laser intensity, magnetic field, temperature, etc.) and the measurement of the clock frequency show that the medium-term frequency instability is mostly limited by laser power and magnetic field fluctuations at the level of 2x10-14 at 2 000 s integration time. These analyses also show that laser power fluctuations, despite servo loop control, are related to polarisation fluctuations through temperature fluctuations inside the experiment isolation box. Finally, the studies of a dual-frequency and dual-polarisation laser for a compact CPT clock are presented, paving the way to industrialisation by reducing the optical bench
McGahey, Christopher Shawn. « Harnessing nature's timekeeper ». Diss., Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/28255.
Texte intégralCommittee Chair: Usselman, Steven; Committee Member: Ceccagnoli, Marco; Committee Member: Giebelhaus, August; Committee Member: Hunt, William; Committee Member: Krige, John.
Yu, Jen-Tsung, et 游仁宗. « A Compact Delay-Recycled Clock Skew-Compensation And/Or Duty-Cycle-Correction Circuit ». Thesis, 2011. http://ndltd.ncl.edu.tw/handle/34570195575256761660.
Texte intégral國立暨南國際大學
電機工程學系
99
A clock skew-compensation and/or duty-cycle correction circuit (CSADC) is indispensably required to maximize the performance of a synchronous double edge clocking system. Most conventional CSADC adopted a cascade structure that inherits a lower performance property that is causing a slower the locking procedure, meanwhile the dual loop design results in more design complexity. In this thesis, a compact delay-recycled CSADC was proposed. There are two significant design concepts in the CSADC. The first is a fast locking and low power measure-and-tuned architecture. The second is a bandwidth augmentation technique. Compared to conventional CSADCs, the proposed circuit achieves at least a 4.24 times reduction in power, a 7.93 times reduction in power bandwidth ratio, and a 1.11 times reduction in lock-in cycles. In TSMC 0.18-μm 1P6M 1.8V CMOS process, the “input signal frequency range” of the proposed CSADC from 300MHz to 2GHz, and the corrected duty cycle variation ranges from 48.41% to 55.51% are confirmed through HSPICE circuit simulation. When the clock frequency is 2GHz, the acceptable input duty cycles ranges from 30% to 70%. Besides, the aligned phase error and power consumption are 67ps and 5.87mW, respectively.
Livres sur le sujet "Compact clock"
Company, Atkins Clock. Illustrated catalogue of clocks manufactured by the Atkins Clock Company, Bristol, Conn. Bristol, Conn : American Clock & Watch Museum, 1999.
Trouver le texte intégralGeller, Clint B. A study of E. Howard & Co. watchmaking innovations, 1858-1875 by Clint Geller. Columbia, PA : National Association of Watch and Clock Collectors, 2005.
Trouver le texte intégralUnitt, Doris Joyce. Arthur Pequegnat clocks : With history & price guide. Peterborough, Ont : Clock House Publications, 1985.
Trouver le texte intégralTownsend, George E. E. Howard & Co. watches, 1858-1903. Kansas City, Mo. (P.O. Box 9808, Kansas City 64134) : Heart of America Press, 1985.
Trouver le texte intégralLy, Tran Duy. Seth Thomas clocks & movements : A guide to identification and prices. Arlington, Va : Arlington Book Co., 1985.
Trouver le texte intégralSeth Thomas clocks & movements. 3e éd. [Johnson City, TN : Arlington Book Co.], 2004.
Trouver le texte intégralHerrmann, Wayne. The wonderful world of pendulettes : Lux, Keebler & Westclox. Merriam, Ks : R & W Publishers, 2000.
Trouver le texte intégralE, Connell James, dir. The Canada and Hamilton clock companies. Erin, Ont : Boston Mills Press, 1986.
Trouver le texte intégralVarkaris, Jane. The Canada and Hamilton clock companies. Erin, Ont : Boston Mills Press, 1986.
Trouver le texte intégralThe watch of the future : The story of the Hamilton electric watch. 2e éd. Corte Madera, CA : R. Rondeau, 1992.
Trouver le texte intégralChapitres de livres sur le sujet "Compact clock"
Li, Yuanhao, Shaohang Xu, Sifei Chen, Chang Liu, Jiale Wang, Yining Li et Yanhui Wang. « Research of Light Shift in Pulse Light Detected Compact Cesium Beam Clock ». Dans Lecture Notes in Electrical Engineering, 353–60. Singapore : Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-2576-4_31.
Texte intégralHogan, Peter A., et Dirk Puetzfeld. « Gravitational (Clock) Compass ». Dans Frontiers in General Relativity, 99–125. Cham : Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-69370-1_5.
Texte intégralTrautschold, Martin, et Gary Mazo. « Utilities : Clock, Calculator, Compass, and Weather ». Dans iPhone 4 Made Simple, 593–614. Berkeley, CA : Apress, 2010. http://dx.doi.org/10.1007/978-1-4302-3193-6_26.
Texte intégralBertolucci, Cristiano, Elena Frigato et Augusto Foà. « The Reptilian Clock System : Circadian Clock, Extraretinal Photoreception, and Clock-Dependent Celestial Compass Orientation Mechanisms in Reptiles ». Dans Biological Timekeeping : Clocks, Rhythms and Behaviour, 223–39. New Delhi : Springer India, 2017. http://dx.doi.org/10.1007/978-81-322-3688-7_10.
Texte intégralZhang, Yize, Junping Chen, Xiuqiang Gong, Bin Wu, Jiexian Wang, Sainan Yang et Mao Li. « Modeling and Application of COMPASS Satellite Orbits and Clocks Predicted Correction ». Dans Lecture Notes in Electrical Engineering, 181–91. Berlin, Heidelberg : Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-54743-0_16.
Texte intégralXu, Shaohang, Sifei Chen, Chang Liu, Yining Li, Jiale Wang et Yanhui Wang. « A New Method to Suppress the AC-Stark Shift of Compact Cesium Beam Atomic Clocks ». Dans Lecture Notes in Electrical Engineering, 17–25. Singapore : Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-3146-7_2.
Texte intégralObukhov, Yuri N., et Dirk Puetzfeld. « Measuring the Gravitational Field in General Relativity : From Deviation Equations and the Gravitational Compass to Relativistic Clock Gradiometry ». Dans Fundamental Theories of Physics, 87–130. Cham : Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-11500-5_3.
Texte intégralSchmal, Christoph, Gregor Mönke et Adrián E. Granada. « Analysis of Complex Circadian Time Series Data Using Wavelets ». Dans Methods in Molecular Biology, 35–54. New York, NY : Springer US, 2022. http://dx.doi.org/10.1007/978-1-0716-2249-0_3.
Texte intégralHeinold, Alina, Marc Kuhn et Meike Grimme. « “Point-and-Click” – B2B-Customer Loyalty in the Internet : An Empirical Study on Potential Antecedents Exemplified at German Company “WERU” ». Dans Celebrating the Past and Future of Marketing and Discovery with Social Impact, 11–24. Cham : Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-95346-1_6.
Texte intégral« A Wash ». Dans Compass and Clock, 71–72. Ohio University Press, 2016. http://dx.doi.org/10.2307/j.ctv224tz56.44.
Texte intégralActes de conférences sur le sujet "Compact clock"
Newman, Zachary, David Carlson, Andrew Ferdinand et Scott B. Papp. « Engineered Multi-Output Supercontinuum Generation in Tantala Waveguides for Optical-Lattice-Clock Stabilization ». Dans CLEO : Science and Innovations. Washington, D.C. : Optica Publishing Group, 2022. http://dx.doi.org/10.1364/cleo_si.2022.sm2f.5.
Texte intégralLe Coq, Y., C. W. Oates et L. Hollberg. « Ultra-Stable Compact Optical Atomic Clock ». Dans Laser Science. Washington, D.C. : OSA, 2006. http://dx.doi.org/10.1364/ls.2006.lthb4.
Texte intégralLurie, A., C. R. Locke, C. Perrella, P. S. Light, F. Benabid et A. N. Luiten. « Towards a compact optical fibre clock ». Dans 2010 Conference on Precision Electromagnetic Measurements (CPEM 2010). IEEE, 2010. http://dx.doi.org/10.1109/cpem.2010.5544157.
Texte intégralJammi, S., A. Ferdinand, Z. Newman, C. Ropp, W. Zhu, W. Lunden, D. Sheredy et al. « Integrated Photonics for a Compact Strontium Optical Clock ». Dans CLEO : Science and Innovations. Washington, D.C. : Optica Publishing Group, 2022. http://dx.doi.org/10.1364/cleo_si.2022.sf2k.7.
Texte intégralDeNatale, J. F., R. L. Borwick, C. Tsai, P. A. Stupar, Y. Lin, R. A. Newgard, R. W. Berquist et M. Zhu. « Compact, low-power chip-scale atomic clock ». Dans 2008 IEEE/ION Position, Location and Navigation Symposium. IEEE, 2008. http://dx.doi.org/10.1109/plans.2008.4570007.
Texte intégralTremine, S., S. Guerandel, D. Holleville, N. Dimarcq et A. Clairon. « Microwave interrogation in a compact atomic clock ». Dans 18th European Frequency and Time Forum (EFTF 2004). IEE, 2004. http://dx.doi.org/10.1049/cp:20040899.
Texte intégralBregazzi, Alan, Etienne Batori, Ben Lewis, Christoph Affolderbach, Gaetano Mileti, Erling Riis et Paul Griffin. « A compact cold-atom double-resonance clock ». Dans Quantum Sensing, Imaging, and Precision Metrology, sous la direction de Selim M. Shahriar et Jacob Scheuer. SPIE, 2023. http://dx.doi.org/10.1117/12.2657390.
Texte intégralLaudat, Théo, Konstantin Ott, Mengzi Huang, Vincent Dugrain, Alice Sinatra, Peter Rosenbusch, Carlos Garrido Alzar et Jakob Reichel. « Creating Spin Squeezing in a Compact Atomic Clock ». Dans Quantum Information and Measurement. Washington, D.C. : OSA, 2017. http://dx.doi.org/10.1364/qim.2017.qf2a.2.
Texte intégralPoli, N., R. E. Drullinger, G. Ferrari, M. Prevedelli, F. Sorrentino, M. G. Tarallo et G. M. Tino. « Prospect for a compact strontium optical lattice clock ». Dans Optical Engineering + Applications, sous la direction de R. Jason Jones. SPIE, 2007. http://dx.doi.org/10.1117/12.739057.
Texte intégralShah, Vishal, Robert Lutwak, Richard Stoner et Mark Mescher. « A compact and low-power cold atom clock ». Dans 2012 IEEE International Frequency Control Symposium (FCS). IEEE, 2012. http://dx.doi.org/10.1109/fcs.2012.6243691.
Texte intégralRapports d'organisations sur le sujet "Compact clock"
Buell, W. F., et B. Jaduszliwer. Compact CW Cold Beam Cesium Atomic Clock. Fort Belvoir, VA : Defense Technical Information Center, juillet 2000. http://dx.doi.org/10.21236/ada380684.
Texte intégralWoyczynski, Lauren, Christina Misunas et Md Irfan Hossain. Building the Adolescent Indicators and Gender Gaps Dashboard. Population Council, 2022. http://dx.doi.org/10.31899/sbsr2022.1014.
Texte intégralSamach, Alon, Douglas Cook et Jaime Kigel. Molecular mechanisms of plant reproductive adaptation to aridity gradients. United States Department of Agriculture, janvier 2008. http://dx.doi.org/10.32747/2008.7696513.bard.
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