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Showing 1 to 20 of 502 for “"cryogenic"”.
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Cryogenic optical refrigeration
… coolers. Further cooling below the NIST-defined cryogenic temperature of 123K is shown feasible for for this record cooling sample given sufficient absorbed power. With an order of magnitude improvement to parasitic background absorption, theory predicts cooling which approaches liquid nitrogen …
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Cryogenic characteristics of IGBTs
… significant work has been undertaken on the cryogenic operation of small devices, little has been published on larger devices, particularly the IGBT. This therefore forms the focus of this study. To examine the cryogenic performance of the sample devices, a cryo-system consisting of a cold …
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Impact cryogenic vapor explosions.
Thesis. 1977. M.S.--Massachusetts Institute of Technology. Dept. of Chemical Engineering.
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Magnetically augmented cryogenic refrigeration
Thesis (Mech. E.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1995.
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Cryogenic characterization of Josephson junctions
Cryogenic characterization is a crucial part of understanding the behavior of low-temperature quantum electronics. Reliable device testing provides the feedback to fabrication process development, facilitating the rapid development of quantum devices. The research presented in this thesis explores …
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Numerical Simulation of a Cryogenic Spray
<p>Cryogenic sprays have many applications in modern engineering. Cooling of electronic equipment subject to high heat flows, surgical ablation of gastrointestinal mucosae or orbital maneuvering are a few examples of their versatility. However, the atomization of a cryogenic liquid is a complex …
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On-Orbit Cryogenic Propellant Storage Optimization
<p>The optimization of an on-orbit Cryogenic Propellant Storage (CPS) system enables human exploration missions by reducing launch vehicle mass to orbit requirements and providing an extensible approach for human spaceflight missions to near-Earth asteroids, the moon, and Mars. The optimal CPS …
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Electron Interactions in Cryogenic Helium Plasmas
Made available in DSpace on 2015-05-12T21:41:28Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 6408381.PDF: 4187284 bytes, checksum: 9e1426669fe9023e1236bd737ee05aff (MD5) Previous issue date: 1964
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Preliminary design of a cryogenic thermoelectric generator.
A cryogenic thermoelectric generator is proposed to increase the efficiency of a vehicle propulsion system that uses liquid nitrogen as its fuel. The proposed design captures some of the heat required for vaporizing or initial heating of the liquid nitrogen to produce electricity. The …
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CRESST Dark Matter Search with Cryogenic Calorimeters
Das CRESST Experiment im Gran Sasso Untergrundlabor sucht nach Dunkler Materie in Form von schwach wechselwirkenden massiven Teilchen (WIMPs) ueber elastische Streuung an Kernen. Die erste Phase von CRESST benutzte 262 g Saphir Kristalle als Absorber. Ein niedriger Untergrund, eine …
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Cryogenic carbon cycling at an Icelandic glacier
Glaciers and ice caps are recognised as an important component of the global carbon cycle. Carbon within glacial systems exists in organic and inorganic forms, across supraglacial, englacial and subglacial realms. It is often difficult to detach cryospheric carbon cycling from hydrology, with the …
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Structure and stabilization of cryogenic spray flames
… on its efficiency and reliability. Engines using cryogenic fuels, such as liquid oxygen and hydrogen, are used for most missions since they combine high performance with a relatively light structure. The design of such motors has, until recently, been based on empirical results from systematic …
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Millivolt silicon photonic modulators for cryogenic applications
Cryogenic technologies promise to overcome existing bottlenecks in a range of science and engineering fields including quantum computing, high performance computing and single-photon communication systems. As these technologies mature and systems scale, a readout solution for high speed, low power …
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Calibration of Infrared Photons in Cryogenic Germanium Detectors
… physics to the dark matter puzzle. The Super Cryogenic Dark Matter Search experiment (SuperCDMS) is considered one of the pioneer experiments in the direct search for WIMPs. It is based primarily on deploying germanium and silicon detectors at cryogenic temperatures to search for direct …
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MANAGING CRYOGENIC ENERGY FLUID STORAGE AND TRANSFER OPERATIONS
… level, temperature, pressure, and composition in cryogenic tanks. Additionally, we combined the tank model with the Unisim® process simulator to create a dynamic simulation twin for LNG bunkering systems, enabling analysis of Truck-to-Ship and Ship-to-Ship bunkering operations following the LNG …
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CRYOGENIC ATOMIC FORCE MICROSCOPE FOR CHARACTERIZATION OF NANOSTRUCTURES
… we present the design and applications of a cryogenic atomic force microscope (AFM) for characterization of nanostructures. The cryogenic AFM with a conductive tip can measure DC current through nanostructures. We use quartz tuning fork (QTF) as the force sensor. Unique coarse z motor design …
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