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Showing 1 to 20 of 146 for “"Liquid Nitrogen"”.
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Surface Conductance of Germanium Cleaved in Liquid Nitrogen
Made available in DSpace on 2015-05-12T21:38:35Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 6607790.PDF: 2870570 bytes, checksum: be1d0c9d543d1078a703954ef3556d85 (MD5) Previous issue date: 1966
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Surface conductance of germanium cleaved in liquid nitrogen
… occurring upon cleavage of a (Ill) plane, in liquid nitrogen, Experiments are carried out with n-type samples whose donor concentrations vary from 10 13 to 10 18 /cm 3 • D-c measurements are made on p-n-p structures; upon cleavage ~ a po-type channel is formed across the surface, It is found …
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Pool boiling of liquid nitrogen on corrugated surfaces
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1980.
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Thermal bubble behaviour in liquid nitrogen under electric fields
… thermally induced bubble behaviour changes in liquid nitrogen (LN2) under electric fields. Cryogenic liquids such as LN2 have been used not only as the coolant but also as the electrical insulator in superconducting and cryogenic apparatus. However, bubbles are easily formed in these liquids by …
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Submerged combustion of premixed hydrocarbon-oxygen flames in liquid nitrogen
… flames were operated beneath the surface of liquid nitrogen in hopes that some unusual intermediates would be obtained from the resulting quenching process. This quenching would prevent the further reaction of the intermediates which would lead to the final products that are observed under …
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Optimizing Laser and Liquid Nitrogen Treatments for Weed Control in Turfgrass Systems
… to problematic turfgrass weeds: cryogenic liquid exposure and patterned laser energy. In the cryogenic study, a custom-built applicator was used to deliver precise doses of liquid nitrogen (LN) to individual plants of goosegrass (Eleusine indica) and annual bluegrass (Poa annua). Four field …
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Convective heat transfer model for determining quench recovery of high temperature superconducting YBCO in liquid nitrogen
… of high temperature superconductors (HTS), liquid nitrogen may be used to cool HTS devices. Yttrium barium copper oxide (YBCO), an HTS with critical temperature of 93 K, is a promising HTS for transmission cables and electric power devices. However, before the coated YBCO conductor can be …
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Design and analysis of a liquid nitrogen delivery system for cooling a high temperature superconducting magnet for MAGLEV
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1995.
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An SEM surface study of nucleate pool boiling heat transfer to saturated liquid nitrogen reduced pressures from 0.1 to 0.9
… boiling and maximum heat flux characteristics of liquid nitrogen boiling from characterized surfaces. Several textures of gold plated copper surfaces were studied in addition to silver and silver oxide surfaces. Data were taken over a wide range of reduced pressures. All surfaces were examined …
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Liquid nitrogen as a suitable alternative to pistachios peeling process [Azoto liquido come alternativa sostenibile per il processo di pelatura del pistacchio]
… di dottorato ha analizzato l’impiego dell’azoto liquido (LN2) come metodo criogenico di pelatura sostenibile, o cryopeeling, valutandone gli effetti sull’efficienza, sulla qualità della granella del prodotto pelato e sulla conservazione dei composti antiossidanti nelle skin. Le prove condotte …
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Infrared absorption of neutron irradiated silicon
… to that of non-irradiated silicon at room and liquid nitrogen temperatures. It was found that instead of the 1.75 micron absorption band that has been mentioned in numerous papers transmission was completely cut off below about 2.5 microns at room temperature and about 1.8 microns at liquid …
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A theoretical and experimental investigation of the annular jet ground effect machine
… to that of non-irradiated silicon at room and liquid nitrogen temperatures. It was found that instead of the 1.75 micron absorption band that has been mentioned in numerous papers transmission was completely cut off below about 2.5 microns at room temperature and about 1.8 microns at liquid …
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Determination of Phase Fraction, Lattice Parameters and Crystallite Size in Mechanically Alloyed Fe-Ni Powders
… alloyed Fe-Ni powders ball milled at liquid nitrogen temperature. Pure Fe-Ni samples were ball milled in a SPEX 8000 shaker mill at liquid nitrogen temperature. X-ray diffractometry was used to determine the phase fractions of the bcc and fcc phases in the alloys and to determine the …
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Preliminary design of a cryogenic thermoelectric generator.
… 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 thermoelectric generator uses pressurized liquid nitrogen as its cold reservoir …
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Investigation of temperature effects on electro mechanically cooled Ge detectors
… mechanically cooled Xcooler detector, an Ortec liquid nitrogen cooled detector and a Canberra cryo-cycle hybrid electro mechanical/ liquid nitrogen cooled detector. The ambient room temperature was controlled between temperatures of � 5 - 30oC and the energy resolution for the 60, 122, 779 and …
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Transformation Behavior of a Titanium(50)nickel(47)iron(3) Alloy
… temperature range between room temperature and liquid nitrogen temperature. Based
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Transmission Electron Microscopy (Tem) Study of Minerals in Coal
… cut from these coals; a cold stage cooled by liquid nitrogen was used to reduce thermal degradation of the minerals by the ion-beam.
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