cryogenic temperatures
Development Of An Experimental Setup For Emissivity Measurement At Cryogenic Temperatures
... ________________________________________________________________________________________________________ Abstract— Emisssivity is a prime most important factor that has to be known to calculate heat loads on the ...
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Characterizing the attenuation of coaxial and rectangular microwave-frequency waveguides at cryogenic temperatures
... We have presented measurements of the attenuation constant of commonly used, com- mercially available low-loss coaxial cables and rectangular waveguides down to millikelvin temperatures in a frequency range ...
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Enhanced Tensile Strength and Plasticity of Zr Cu Al Bulk Glassy Alloys at Cryogenic Temperatures
... cant difference is observed in a shear band structure on the side surface near the fracture surface. At temperatures of 295 and 223 K, almost no shear bands are observed on the side surfaces, as shown in Fig. 6(b) ...
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Tensile Characterization of Carbon Nanotube Reinforced Polymer Composites at Cryogenic Temperatures: Experimens and Multiscale Simulations
... This paper focuses on understanding the cryogenic tensile response of CNT-reinforced polymer composites. Tensile tests were performed at room temperature and liquid nitrogen temperature (77 K) on the composites ...
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Mechanical Properties and Dislocation Substructure of 6061 T6 Aluminum Alloy Impacted at Cryogenic Temperatures
... the cryogenic temperature regime, a pronounced strengthening effect occurs as the deformation temperature is ...under cryogenic temperatures and high strain ...
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GLOBAL JOURNAL OF ADVANCED ENGINEERING TECHNOLOGIES AND SCIENCES MEASUREMENT OF STORAGE CAPACITY OF ADSORBENTS IN A HYDROGEN STORAGE PROCESS AT CRYOGENIC TEMPERATURES Tomáš Brestovič *, Natália Jasminská, Marian Lázár, Romana Dobáková
... of cryogenic temperatures and the adsorption substances results in a significant reduction of the pressure of hydrogen stored, and hence the method is suitable for the ...
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Irradiation effect on structure integrity of bimetallic welds at cryogenic temperatures
... Bimetallic welds are used extensively in the construction of nuclear reactor pressure vessels (RPV). Though these welds have a high strength, they are susceptible to a change in fracture mode from ductile to brittle. ...
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Efficient heating of single molecule junctions for thermoelectric studies at cryogenic temperatures
... The energy dependent thermoelectric response of a single molecule contains valuable information about its transmission function and its excited states. However, measur- ing it requires devices that can efficiently heat ...
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Spectroscopy of polycrystalline materials using thinned-substrate planar Goubau line at cryogenic temperatures.
... 4 Main figure: The effective permittivity of the transmission line left axis and the time between the main pulse and the reflected pulse arising from etalon effects between the PC switch[r] ...
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Stress and Strain Distributions during Machining of Ti-6Al-4V at Ambient and Cryogenic Temperatures
... The mechanical characteristics found in Ti-6Al-4V are very complex because of its strong sensitivity to processing parameters such as strain rate and temperature. It is vital to understand these in order to clarify its ...
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State-selective reactions of cosmic dust analogues at cryogenic temperatures
... Between the target and the end of the copper rod are a series of thin metal foils, a tantalum resistive heater and a pair of 0.5 cm^ ruby blocks. The ruby blocks sit on a layer of indium for good thermal contact at the ...
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Creep compression behaviour of a polyurethane foam from cryogenic temperatures: size effect and long-term prediction
... Abstract. The objective of this work was to predict the long term behavior of Polyurethane foam (PU) at very low-temperature, by applying the time-temperature superposition principle (TTSP). The experimental background ...
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Lindlau, Jessica (2019): Optical spectroscopy of charge-tunable atomically thin semiconductors at cryogenic temperatures. Dissertation, LMU München: Fakultät für Physik
... Within this thesis, optical properties of ML and BL TMDs were studied with con- focal optical spectroscopy ranging from ambient to cryogenic environments and in magnetic fields of up to 9 T. The photophysics of ...
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Mechanical Properties and Dislocation Substructure of Inconel 690 Alloy Impacted at Cryogenic Temperatures
... (Fig. 3(c)). For each strain rate and temperature, the rate at which the flow stress increases with increasing strain is different; indicating a difference in the work hardening rate under different loading conditions. ...
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Photoelectric Properties of InAs/GaAs Quantum Dot Photoconductive Antenna Wafers
... at temperatures ranging from 13 K to 400 K is ...and cryogenic temperatures, we employed a broadly-tunable InAs/GaAs quantum dot based laser providing a coherent pump with power exceeding 20 mW over ...
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Silicon Germanium Heterojunction Bipolar Transistors for Extremely Low Noise Applications
... In this dissertation, the theory, modeling, and applications of state-of-the-art SiGe heterojunc- tion bipolar transistors operating at cryogenic temperatures have been investigated. In the first part of ...
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Molecule assisted ferromagnetic atomic chain formation
... Huygens-Kamerlingh Onnes Laboratory, Leiden University, Niels Bohrweg 2, 2333 CA Leiden, The Netherlands (Received 2 November 2014; revised manuscript received 18 April 2015; published 4 June 2015) One dimensional ...
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High pressure adsorptive storage in hydrogen in MIL 101 (Cr) and AX 21 for mobile applications:cryocharging and cryokinetics
... at cryogenic temperatures and the standard is to use liquid nitrogen temperature (77 K), which is affordable and easily ...are cryogenic temperatures and moderate pressures, certainly lower ...
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CRYOGENIC ENGINES
... 1. Heat conduction :-When the two bodies are in contact, heat flows from the bodies at higher temperature to the body with a lower temperature. Conduction can occur between any and all forms of matter, whether gas, ...
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CRYOGENIC PROCESSES – A REVIEW
... need cryogenic temperatures such as storage of large volumes of gases in small space in the liquefied form, preservation of insemination, very high vacuum applications and fundamental research in ...
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