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Relevant bibliographies by topics / Vibrational energy][Cryogenics

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Academic literature on the topic 'Vibrational energy][Cryogenics'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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Journal articles on the topic "Vibrational energy][Cryogenics"

1

Simpson, C. J. S. M., M. L. Turnidge, and J. P. Reid. "Vibrational energy transfer between molecules dissolved in cryogenic liquids." Journal of Molecular Liquids 70, no. 2-3 (November 1996): 125–31. http://dx.doi.org/10.1016/0167-7322(96)00962-2.

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2

Puchkin, Vladimir, Ilya Turkin, Larisa Salanti, Olga Sumskaja, and Vladimir Kornienko. "Study increase the mechanical characteristics of tool materials by cryogenic treatment." E3S Web of Conferences 279 (2021): 01011. http://dx.doi.org/10.1051/e3sconf/202127901011.

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In this work, the hypothesis of taking into account a specific thermoEMF to determine the degree of hardening of the cutting tool by cryogenic hardening is put forward, which is the most convenient and important value from the point of view of information content. As a result of studies of improving the mechanical characteristics of instrumental materials by cryogenic treatment, the values of the absolute and specific values of thermo emf were revealed depending on the temperature of three instrumental materials obtained by tarrying them together with platinum. The values of temperatures at the maximum values of the specific thermo emf, have been obtained. It was found that deep cooling of the metal increases the degree of ordering of its structure and increases the vibrational energy of the crystal lattice. The results of the study showed that the resistance of the cryogenic cutting tool increases by up to three times, this positively affects the energy efficiency of the use of such a tool in production. The reduction of energy costs is expressed in the reduction of kilowatt-hours associated with the costs of sharpening the tool and can reach up to 30% of the total amount of electricity consumed.

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3

Steinmann, Ricardo G., Gema Martinez-Criado, Damien Salomon, Hugo Vitoux, Remi Tucoulou, Julie Villanova, Sylvain Laboure, Joel Eymery, and Jaime Segura-Ruiz. "A helium mini-cryostat for the nanoprobe beamline ID16B at ESRF: characteristics and performance." Journal of Synchrotron Radiation 27, no. 4 (June 16, 2020): 1074–79. http://dx.doi.org/10.1107/s1600577520007110.

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A helium mini-cryostat has been developed for the hard X-ray nanoprobe ID16B of the European Synchrotron to collect X-ray excited optical luminescence and X-ray fluorescence at low temperature (<10 K). The mini-cryostat has been specifically designed to fit within the strong space restrictions and high-demanding mechanical constraints imposed by the beamline to provide vibration-free operation and maximal thermal stability. This paper reports the detailed design, architecture and technical requirements of the mini-cryostat, and presents the first experimental data measured using the cryogenic equipment. The resulting cryo-system features ultimate thermal stability, fast cool-down and ultra-low vibrations. The simultaneous X-ray fluorescence and X-ray excited optical luminescence data acquired from bulk GaN and core/shell InGaN/GaN multi-quantum wells validated the excellent performance of the cryostat with ultimate resolution, stability and sensitivity.

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4

Borba, A., L. I. L. Cabral, R. Fausto, and M. L. S. Cristiano. "Structure, vibrational spectroscopy, and photochemistry of 5-phenoxy-1-phenyltetrazole in argon and nitrogen cryomatrices." Canadian Journal of Chemistry 93, no. 12 (December 2015): 1335–44. http://dx.doi.org/10.1139/cjc-2015-0025.

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The molecular structure, infrared spectra, and photochemistry of 5-phenoxy-1-phenyltetrazole (5PPT) isolated in argon and N2 cryogenic matrices were investigated by infrared spectroscopy and theoretical calculations (DFT(B3LYP)/6-311++G(d,p)). Calculations yield two dissimilar minima on the potential energy surface of the molecule, both being eightfold degenerate by symmetry and belonging to the C1 symmetry point group. Extensive analysis of the potential energy landscape of the molecule was performed. Upon consideration of the zero-point vibrational correction to the energy, the calculations predict that the higher energy minimum shall relax barrierlessly to the lower energy form, leading to conclude that the compound exists in a single conformer in the gas phase. Accordingly, a single conformer was observed and fully characterized spectroscopically upon isolation of the monomer of the compound in argon and nitrogen cryomatrices. UV-laser irradiation (λ = 250 nm) of matrix-isolated 5PPT leads to photocleavage of the tetrazole ring, with release of N2 and formation of the corresponding carbodiimide.

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5

Toellner, T. S., J. Collins, K. Goetze, M. Y. Hu, C. Preissner, E. Trakhtenberg, and L. Yan. "Ultra-stable sub-meV monochromator for hard X-rays." Journal of Synchrotron Radiation 22, no. 5 (July 17, 2015): 1155–62. http://dx.doi.org/10.1107/s1600577515012230.

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A high-resolution silicon monochromator suitable for 21.541 keV synchrotron radiation is presented that produces a bandwidth of 0.27 meV. The operating energy corresponds to a nuclear transition in151Eu. The first-of-its-kind, fully cryogenic design achieves an energy-alignment stability of 0.017 meV r.m.s. per day, or a 100-fold improvement over other meV-monochromators, and can tolerate higher X-ray power loads than room-temperature designs of comparable resolution. This offers the potential for significantly more accurate measurements of lattice excitation energies using nuclear resonant vibrational spectroscopy if combined with accurate energy calibration using, for example, high-speed Doppler shifting. The design of the monochromator along with its performance and impact on transmitted beam properties are presented.

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6

UCHIYAMA, TAKASHI. "PRESENT STATUS OF CLIO IN 2004." International Journal of Modern Physics A 20, no. 29 (November 20, 2005): 7066–68. http://dx.doi.org/10.1142/s0217751x05030843.

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The CLIO project in Japan consists of two kinds of interferometric detectors in a tunnel of Kamioka mine. One is a geophysical strain meter and the other one is a gravitational wave (GW) detector. The GW detector is called Cryogenic Laser Interferometer Observatory (CLIO). The characteristics of CLIO are the use of cryogenic to reduce the thermal noises and an underground site for low seismic vibration. CLIO is under construction, and installation of the first cryogenic system was completed in the autumn of 2004.

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7

TOMARU, TAKAYUKI, TOSHIKAZU SUZUKI, TOMIYOSHI HARUYAMA, TAKAKAZU SHINTOMI, NOBUAKI SATO, AKIRA YAMAMOTO, YUKI IKUSHIMA, et al. "SMALL VIBRATION CRYOCOOLER SYSTEM FOR CRYOGENIC GRAVITATIONAL WAVE INTERFEROMETER." International Journal of Modern Physics A 20, no. 29 (November 20, 2005): 7063–65. http://dx.doi.org/10.1142/s0217751x05030831.

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An ultra-small vibration cryocooler system for a cryogenic interferometric gravitational wave detector has been developed. The system consists of a pulse tube cryocooler and a vibration-reduction system. Its vibration level was about 50 nm for the vertical direction at 1 Hz, which was three orders of magnitude smaller than that of an original pulse tube cryocooler.

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8

Oliver, V. I., and V. T. Shvetsov. "Reduction of vibrations in gas cryogenic machines." Chemical and Petroleum Engineering 24, no. 4 (April 1988): 180–83. http://dx.doi.org/10.1007/bf01837181.

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9

Oliver, V. I., Yu O. Prusman, A. V. Gromov, and V. V. Den'gin. "High-frequency vibrations of gas cryogenic machines." Chemical and Petroleum Engineering 25, no. 9 (September 1989): 495–97. http://dx.doi.org/10.1007/bf01156020.

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10

Cantargi, Florencia, Javier Dawidowski, Christian Helman, José Ignacio Márquez Damian, Rolando Jose Granada, Giovanni Romanelli, Julio Gabriel Cuello, Goran Skoro, and Matthew Krzystyniak. "Validated scattering kernels for triphenylmethane at cryogenic temperatures." EPJ Web of Conferences 239 (2020): 14002. http://dx.doi.org/10.1051/epjconf/202023914002.

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Cold neutrons are widely used in different fields of research such as the study of the structure and dynamics of solids and liquids, the investigation of magnetic materials, biological systems, polymer science, and a rapidly growing area of industrial applications. In a pulsed neutron source where the pulse width is an important parameter to be considered, hydrogenated materials are often used because of their high energy transfer in each collision. The preliminary scattering kernel for triphenylmethane, a material of great potential interest for cold neutron production, had been presented at the ND2016 conference. Here, a new model for the generation of the scattering kernels for this material, together with experimental results on its total cross section measured at the VESUVIO instrument (ISIS Neutron and Muon Source, United Kingdom) is presented. The thermal scattering kernel was generated by means of the NJOY Nuclear Data Processing system, using as input the vibrational modes obtained by density functional theory techniques (DFT). The agreement between measurements and our model validates the scattering kernel construction and the cross section library generated in ENDF and ACE formats.

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Dissertations / Theses on the topic "Vibrational energy][Cryogenics"

1

Williams, H. T. "Energy transfer in gases and liquids at low temperatures." Thesis, University of Oxford, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.233537.

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Wilson, Graham John. "Energy transfer in gases and cryogenic liquids." Thesis, University of Oxford, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.239254.

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Turnidge, Martin Laurence. "Vibrational energy transfer at low temperatures and the use of infrared laser excitation for trace detection." Thesis, University of Oxford, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.337427.

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Books on the topic "Vibrational energy][Cryogenics"

1

United States. National Aeronautics and Space Administration., ed. Influence of temperature and impact velocity on the coefficient of restitution. [Washington, DC]: National Aeronautics and Space Administration, 1994.

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2

United States. National Aeronautics and Space Administration., ed. Influence of temperature and impact velocity on the coefficient of restitution. [Washington, DC]: National Aeronautics and Space Administration, 1994.

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Conference papers on the topic "Vibrational energy][Cryogenics"

1

Yoshida, Yoshiki, Masato Eguchi, Taiichi Motomura, Masaharu Uchiumi, Hirotaka Kure, and Yoshiyuki Maruta. "Rotordynamic Forces Acting on Three-Bladed Inducer Under Super-Synchronous/Synchronous Rotating Cavitation." In ASME 2008 Fluids Engineering Division Summer Meeting collocated with the Heat Transfer, Energy Sustainability, and 3rd Energy Nanotechnology Conferences. ASMEDC, 2008. http://dx.doi.org/10.1115/fedsm2008-55135.

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Asymmetric cavitation, in which cavity lengths are unequal on each blade, is known as a source of cavitation induced shaft vibration in turbomachinery. To investigate the relationship of the uneven cavity length and rotordynamic force in a cavitating inducer with three blades, we conducted two experiments. In one, the growth of cavity unevenness at the inception of synchronous rotating cavitation in cryogenic flow was observed, and in the other, the rotordynamic fluid forces in water were examined by using a rotordynamic test stand with active magnetic bearings. Rotordynamic performances were obtained within a wide range of cavitation numbers and whirl/shaft speed ratios included super-synchronous/synchronous rotating cavitation. These experimental results indicate that the shaft vibration due to the rotating cavitation is one type of self-excited vibrations arising from the coupling of cavitation instability and rotordynamics.

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2

Yamaguchi, Tomoya, Yuki Oshida, Wong Teck Soon, Kazuo Maeno, and Masanori Ota. "Investigation on Oscillating Behavior of Laser-Induced Cavitation Bubble Near Wall in Room Temperature Water and Cryogenic Liquid." In ASME-JSME-KSME 2011 Joint Fluids Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/ajk2011-10043.

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Cavitation is bubbling phenomena caused by local pressure reduction or strong energy concentration in liquids. Cavitation is widely observed in fluid machinery and it causes vibration, noise, erosion, and loss of efficiency. In addition, cavitation occurs in laser treatment and causes the ruin of human tissues. There are a lot of researches on cavitation phenomena in room temperature liquids. It is known that laser-induced bubble generates pressure waves, and the bubble oscillates and collapses eventually. Recently, it is reported that cavitation occurs in cryogenic liquid such as rocket propellant. However, there are few researches about cavitation in cryogenic liquid. Generally, the thermo-physical properties such as surface tension and viscosity of cryogenic liquid are different from those of room temperature water, and cavitation in cryogenic liquid occurs near boiling temperature (low subcooling region). In our experiment, single bubble was generated by focused laser, and its behavior and pressure wave were visualized. The focusing point of the laser was also settled near a wall in the liquids by designated distance. Interacting behavior of laser-induced bubble with the wall was also investigated. We chose liquid nitrogen (LN2) as cryogenic liquid for safety. LN2 was pressurized in order to increase the degree of subcooling. These experiments show difference of oscillation periods between bubble in water at room temperature and in liquid nitrogen. In addition, there is difference of oscillating behavior of LN2 bubbles in low and high subcooling regions. We discuss influence of the degree of subcooling and stand-off distance. It is found that shapes of deformation and oscillation period of bubble are influenced by these parameters.

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