Patent application number | Description | Published |
20080315108 | Neutron detector - A neutron detector comprises a gas-filled dielectric shell, preferably a glass balloon, having opposite electrodes. An electric field is established whereby ionizing particles may be detected via ionization and current flow in the gas, using a pulse height analyzer or other conventional means. The dielectric shell preferably has low gas permeability and a bulk resistivity in the range of 10 | 12-25-2008 |
20090078872 | Doped Carbon Nanostructure Field Emitter Arrays for Infrared Imaging - An infrared imaging device and method for making infrared detector(s) having at least one anode, at least one cathode with a substrate electrically connected to a plurality of doped carbon nanostructures; and bias circuitry for applying an electric field between the anode and the cathode such that when infrared photons are absorbed by the nanostructures the emitted field current is modulated. The detectors can be doped with cesium to lower the work function. | 03-26-2009 |
20100155617 | Neutron detector - A neutron detector comprises a gas-filled dielectric shell, preferably a glass balloon, having opposite electrodes. An electric field is established whereby ionizing particles may be detected via ionization and current flow in the gas, using a pulse height analyzer or other conventional means. The dielectric shell preferably has low gas permeability and a bulk resistivity in the range of 10 | 06-24-2010 |
20110228640 | Torsional Ultrasonic Wave Based Level Measurement System - A level measurement system suitable for use in a high temperature and pressure environment to measure the level of coolant fluid within the environment, the system including a volume of coolant fluid located in a coolant region of the high temperature and pressure environment and having a level therein; an ultrasonic waveguide blade that is positioned within the desired coolant region of the high temperature and pressure environment; a magnetostrictive electrical assembly located within the high temperature and pressure environment and configured to operate in the environment and cooperate with the waveguide blade to launch and receive ultrasonic waves; and an external signal processing system located outside of the high temperature and pressure environment and configured for communicating with the electrical assembly located within the high temperature and pressure environment. | 09-22-2011 |
20120324908 | APPARATUS AND METHOD FOR MAGNETICALLY PROCESSING A SPECIMEN - An apparatus for magnetically processing a specimen that couples high field strength magnetic fields with the magnetocaloric effect includes a high field strength magnet capable of generating a magnetic field of at least 1 Tesla and a magnetocaloric insert disposed within a bore of the high field strength magnet. A method for magnetically processing a specimen includes positioning a specimen adjacent to a magnetocaloric insert within a bore of a magnet and applying a high field strength magnetic field of at least 1 Tesla to the specimen and to the magnetocaloric insert. The temperature of the specimen changes during the application of the high field strength magnetic field due to the magnetocaloric effect. | 12-27-2012 |
20130014863 | METHOD OF MAGNETICALLY PROCESSING AN IRON-CARBON ALLOYAANM Ludtka; Gerard M.AACI Oak RidgeAAST TNAACO USAAGP Ludtka; Gerard M. Oak Ridge TN USAANM Ludtka; Gail M.AACI Oak RidgeAAST TNAACO USAAGP Ludtka; Gail M. Oak Ridge TN USAANM Wilgen; John B.AACI Oak RidgeAAST TNAACO USAAGP Wilgen; John B. Oak Ridge TN USAANM Kisner; Roger A.AACI KnoxvilleAAST TNAACO USAAGP Kisner; Roger A. Knoxville TN US - A magnetic field assisted processing method entails heating an iron-carbon alloy at an austenitizing temperature for a time duration sufficient for the alloy to achieve an austenitic microstructure; cooling the iron-carbon alloy to an intermediate temperature defined by a continuous cooling transformation (CCT) diagram for the iron-carbon alloy at a rate sufficient to avoid phase transformation of the austenitic microstructure, the intermediate temperature being below a bainitic knee of the CCT diagram and above a martensite start temperature; and applying a high field strength magnetic field of at least about 0.2 Tesla to the iron-carbon alloy after reaching the intermediate temperature. The field is applied for a time duration sufficient to transform the austenitic microstructure into a fine dispersion of one or more iron carbide phases in a ferrite matrix in order to produce a magnetically-processed alloy having improved ductility and strength. | 01-17-2013 |
20130241389 | VACUUM FIELD EMISSION DEVICES AND METHODS OF MAKING SAME - A field emission device includes a substrate and a plurality of wires embedded in the substrate. The plurality of wires has at least a field emitter cathode wire; a control grid wire array; and a collector anode array. The field emitter cathode wire, control grid wire array, and collector anode array are embedded in and extend through a nonconductive substrate matrix. A method for making a vacuum field emission device is also disclosed. | 09-19-2013 |
20140251506 | IRON-BASED COMPOSITION FOR MAGNETOCALORIC EFFECT (MCE) APPLICATIONS AND METHOD OF MAKING A SINGLE CRYSTAL - A method of making a single crystal comprises heating a material comprising magnetic anisotropy to a temperature T sufficient to form a melt of the material. A magnetic field of at least about 1 Tesla is applied to the melt at the temperature T, where a magnetic free energy difference ΔG | 09-11-2014 |
20140269151 | EMAT ENHANCED DISPERSION OF PARTICLES IN LIQUID - Particulate matter is dispersed in a fluid material. A sample including a first material in a fluid state and second material comprising particulate matter are placed into a chamber. The second material is spatially dispersed in the first material utilizing EMAT force. The dispersion process continues until spatial distribution of the second material enables the sample to meet a specified criterion. The chamber and/or the sample is electrically conductive. The EMAT force is generated by placing the chamber coaxially within an induction coil driven by an applied alternating current and placing the chamber and induction coil coaxially within a high field magnetic. The EMAT force is coupled to the sample without physical contact to the sample or to the chamber, by another physical object. Batch and continuous processing are utilized. The chamber may be folded within the bore of the magnet. Acoustic force frequency and/or temperature may be controlled. | 09-18-2014 |