Littérature scientifique sur le sujet « D1 cooling »
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Articles de revues sur le sujet "D1 cooling"
Maximenko, Serguei I., Jaime A. Freitas, N. Y. Garces, E. R. Glaser et Mark A. Fanton. « Evolution of D1-Defect Center in 4H-SiC during High Temperature Annealing ». Materials Science Forum 600-603 (septembre 2008) : 429–32. http://dx.doi.org/10.4028/www.scientific.net/msf.600-603.429.
Texte intégralZharov, M. V. « Analysis of features of heat transfer processes during crystallization of aluminum alloy granules in aqueous and water-vapor media ». Materials Science, no 8 (2023) : 3–13. http://dx.doi.org/10.31044/1684-579x-2023-0-8-3-13.
Texte intégralDouzi, Wafa, Xavier Guillot, Delphine Bon, François Seguin, Nadège Boildieu, Daniel Wendling, Nicolas Tordi, Olivier Dupuy et Benoit Dugué. « 1H-NMR-Based Analysis for Exploring Knee Synovial Fluid Metabolite Changes after Local Cryotherapy in Knee Arthritis Patients ». Metabolites 10, no 11 (13 novembre 2020) : 460. http://dx.doi.org/10.3390/metabo10110460.
Texte intégralSingh, Balkar, Sehijpal Singh, Vivek Aggarwal et Gurpreet Singh. « Modeling and Optimization of Turning Hastelloy C-276 under Sustainable Machining Environments ». Solid State Phenomena 356 (18 mars 2024) : 21–31. http://dx.doi.org/10.4028/p-bj6vjw.
Texte intégralMishra, Purna Chandra, Dipti Kanta Das et Susant Kumar Sahu. « Comparative Performance In Hard Turning Of AISI 1015 Steel With Carbide Insert Using Orthogonal Array Design And Grey Relational Analysis Under Spray Impingement Cooling And Dry Environment ». International Journal of Manufacturing, Materials, and Mechanical Engineering 4, no 3 (juillet 2014) : 1–32. http://dx.doi.org/10.4018/ijmmme.2014070101.
Texte intégralYeargin, Susan, Amy L. McKenzie, Lindsey E. Eberman, J. Derek Kingsley, David J. Dziedzicki et Patrick Yoder. « Physiological and Perceived Effects of Forearm or Head Cooling During Simulated Firefighting Activity and Rehabilitation ». Journal of Athletic Training 51, no 11 (1 novembre 2016) : 927–35. http://dx.doi.org/10.4085/1062-6050-51.10.09.
Texte intégralTalarico, F. M., E. Stump, B. F. Gootee, K. A. Foland, R. Palmeri, W. R. Van Schmus, P. K. Brand et C. A. Ricci. « First evidence of a “Barrovian”-type metamorphic regime in the Ross orogen of the Byrd Glacier area, central Transantarctic Mountains ». Antarctic Science 19, no 4 (2 août 2007) : 451–70. http://dx.doi.org/10.1017/s0954102007000594.
Texte intégralSchulz, Bernhard. « Mineral chemistry, geothermobarometry and pre-Alpine high-pressure metamorphism of eclogitic amphibolites and mica schists from the Schobergruppe, Austroalpine basement, Eastern Alps ». Mineralogical Magazine 57, no 387 (juin 1993) : 189–202. http://dx.doi.org/10.1180/minmag.1993.057.387.01.
Texte intégralHermansyah, Hermansyah, Novian Sutami et Miksusanti Miksusanti. « AMPLIFIKASI PCR DOMAIN D1/D2 28S rDNA MENGGUNAKAN PRIMER ITS1 DAN ITS4 SAMPEL DNA DARI Candida tropicalis YANG DIISOLASI DENGAN METODE PENDINGINAN ». Indonesian Journal of Pure and Applied Chemistry 1, no 1 (23 juillet 2018) : 1. http://dx.doi.org/10.26418/indonesian.v1i1.26037.
Texte intégralBalogun, Kayode B., Griffin Nicholls, Olujide Sokunbi et Kara R. Stewart. « PSV-9 Effects of Natural Honey Inclusion in Dilution and Freezing Extenders on Frozen-thawed Semen Quality in Boars ». Journal of Animal Science 99, Supplement_1 (1 mai 2021) : 211. http://dx.doi.org/10.1093/jas/skab054.346.
Texte intégralThèses sur le sujet "D1 cooling"
Dash, Gentle. « Simultaneous D1 laser cooling of Bose-Fermi Lithium isotopes ». Electronic Thesis or Diss., Université Paris sciences et lettres, 2022. http://www.theses.fr/2022UPSLE039.
Texte intégralThis thesis reports on the construction of a new generation Bose-Fermi quantum gas experiment. We implement simultaneous D1 sub-Doppler cooling on ⁶Liand ⁷Li isotopes. We operate D1 molasses on ⁷Li |Fg = 2⟩ → |Fe = 1⟩ and on ⁶Li |Fg = 3/2⟩ → |Fe = 3/2⟩ which display dark states. Using a novel pulsed sequence we cool both isotopes from a magneto optical trap (MOT) temperature of ∼ 1 mKto less than 100 µK in 3 ms. We discuss the optimization of the pulsed cooling sequence. We also provide a detailed description of the machine focusing in particular on the all-diode laser system, the magnetic field coil design and the new computer control system. The obtained phase space densities of ∼ 2 × 10⁻⁶ are suitable for directly loading a far detuned optical dipole trap with ∼ 7 × 10⁵ atoms where evaporative cooling to dual quantum degeneracy could be performed. Our results pave the way towards the study of Bose-Fermi quantum many-body physics at low temperature
Sievers, Franz. « Ultracold Fermi mixtures and simultaneous sub-Doppler laser cooling of fermionic 6Li and 40K ». Thesis, Paris 6, 2014. http://www.theses.fr/2014PA066221/document.
Texte intégralThis thesis reports on novel techniques for experimental studies of ultracold, fermionic lithium and potassium quantum gases. The new parts of our 6Li-40K apparatus are described and characterised. We present a narrow-linewidth, all-solid-state laser source, emitting 5W at 671 nm. We employ the laser source in the context of a novel sub-Doppler cooling mechanism, operating on the D1 atomic transition of alkali atoms, for laser cooling of lithium. This D1 molasses allows us to simultaneously cool a mixture of 6Li and 40K atoms to deep sub-Doppler temperatures, while retaining large atom numbers and high atomic densities. The measured phase space densities after the molasses phase are on the order of 10-4 for both 6Li and 40K. The D1 laser cooling paves the way for fast evaporation to quantum degeneracy in magnetic and optical traps. We present the evaporative cooling of 40K atoms. The evaporation starts in an optically plugged magnetic quadrupole trap and continues in an optical dipole trap. At the end of the evaporation, we obtain a quantum degenerate spin-mixture of 40K atoms, with more than 7x105 atoms in each of the two spin states and T/TF<0.34
Neto, Julio Flemming. « Co-desaceleração de dois alcalinos via laser e aumento de eficiência e novas formas de aprisionamento em armadilhas magneto-ópticas ». Universidade de São Paulo, 1995. http://www.teses.usp.br/teses/disponiveis/76/76131/tde-26052014-163530/.
Texte intégralWe demonstrate, for the first time, a laser cooling of a double atomic beam. By loading an oven at 650oC with a Li179Na alloy we get an effusive distillation producing a beam with equal fluxes of Li and Na. This two-species beam was laser cooled by Zeeman technique with Li = -850 MHz and Na = +150 MHz detunings from the corresponding 2S1/2 F = 2 2P3/2 F = 3 atomic transitions. In a second experiment, we show a new two-color vapor-cell magneto-optical trap. By surrounding type-I Na trap with a non-overlaping type-II trap we achieve a ~10-fold improvement in the number of cooled atoms. This is achieved when the capture laser is detuned 12 MHz to the red of the 32S1/2 F = 2 32P3/2 F = 2 transition. In a third experiment, we observe the first alkaline magneto-optical trap operating on 2S1/2 2P1/2 transition (D1 line). For the choosen sodium atoms, we have four different traps within D1 line, with 105 to 107 cooled atoms. For two of them, one has to revert the usual sign of circular polarizations of the cooling lasers, due to negative Zeeman shift of the lower hyperfine levels
Kretzschmar, Norman. « Experiments with Ultracold Fermi Gases : quantum Degeneracy of Potassium-40 and All-solid-state Laser Sources for Lithium ». Thesis, Paris, Ecole normale supérieure, 2015. http://www.theses.fr/2015ENSU0012/document.
Texte intégralThis thesis presents novel techniques for the experimental study of ultracold quantum gases of fermionic lithium and potassium atoms. In the first part of this thesis, we describe the design and characterization of the new components of our experimental apparatus capable of trapping and cooling simultaneously $^6$Li and $^{40}$K atoms to ultracold temperatures. We report on a novel sub-Doppler cooling mechanism, operating on the D$_1$ line transition of alkali atoms, for laser cooling of lithium and potassium. The measured phase space densities after this molasses phase are on the order of $10^{-4}$ for both $^6$Li and $^{40}$K. We present the forced evaporative cooling of $^{40}$K atoms, starting in an optically plugged magnetic quadrupole trap and continuing in an optical dipole trap. In this context, we report on the production of a quantum degenerate Fermi gas of $1.5\times10^5$ atoms $^{40}$K in a crossed dipole trap with $T/T_{_F} = 0.17$, paving the way for the study of strongly interacting superfluids of $^{40}$K. In the second part of this thesis, we present a narrow-linewidth, all-solid-state laser source, emitting 5.2 W in the vicinity of the lithium D-line transitions at 671 nm. The source is based on a diode-end-pumped unidirectional ring laser operating on the 1342 nm transition of Nd:YVO$_4$, capable of producing 6.5 W of single-mode light delivered in a diffraction-limited beam. We report on three different approaches for second-haromonic generation of its output beam, namely by employing an enhancement cavity containing a ppKTP crystal, intracavity frequency doubling and a ppZnO:LN waveguide structure
Suchet, Daniel Léo. « Simulating the dynamics of harmonically trapped Weyl particles with cold atoms Simultaneous sub-Doppler laser cooling of fermionic 6Li and 40K on the D1 line : Theory and experiment Analog simulation of Weyl particles with cold atoms ». Thesis, Paris 6, 2016. http://www.theses.fr/2016PA066262.
Texte intégralDuring my PhD, I contributed to the design and construction of the Fermix experiment, dedicated to the study of a 6Li-40K fermionic mixture at ultra low temperatures. Our main results are twofold. First, we developed a new sub-Doppler laser cooling scheme, taking advantage of the existence of dark states in the D1 line of alkali atoms. This so-called \emph{grey molasses} allows for a phase space density up to 10⁻⁴, the highest value reported for the simultaneous laser cooling of those two species. The improvement due to this cooling step enabled the production of a quantum degenerate 40K gas in a dipole trap, with 3x10⁵ atoms in two spin states at 62 nK, corresponding to 17% of the Fermi temperature. Second, introducing a canonical mapping, we showed that non-interacting ultra-relativistic particles (Weyl fermions) in a harmonic trap can be simulated by cold fermions confined in a quadrupole potential. We study experimentally, numerically and theoretically the relaxation of these systems towards a steady state which can not be described by a Boltzman distribution, but rather presents strongly anisotropic effective temperatures. This analogy also allows us to translate fundamental properties of relativistic particles in the language of cold atoms. In particular, we demonstrate that the Klein paradox is equivalent to Majorana losses. Finally, we present a theoretical study of the long range interactions between particles confined in two 2D layers immersed in a 3D atomic cloud
Livres sur le sujet "D1 cooling"
Refrigeration, International Institute of, dir. Cold chain refrigeration equipment by design : Proceedings of meetings of commissions B1, B2, D1, D2/3 (November 15-18, 1993). Paris : The Institute, 1993.
Trouver le texte intégralActes de conférences sur le sujet "D1 cooling"
Wang, Xue-yi, Jian Pu, Rui-ming Yuan et Jian-hua Wang. « Combined Influence of Surface Deposition and Hole-Blockage on Film-Cooling Performances ». Dans ASME Turbo Expo 2016 : Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/gt2016-56902.
Texte intégralGevorgian, G. A., K. E. Kahramanian, R. B. Kostanian et E. V. Kosheverskii. « Crystalline Air Cooled CW Laser ». Dans The European Conference on Lasers and Electro-Optics. Washington, D.C. : Optica Publishing Group, 1996. http://dx.doi.org/10.1364/cleo_europe.1996.cwf40.
Texte intégralAli, Ehtesham, Hwabhin Kwon, Je-Hyun Lee et Heesung Park. « Analysis of Melting and Solidification Behavior in DED Laser Welding of Inconel 901 ». Dans ASME Turbo Expo 2022 : Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/gt2022-82851.
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