Patent application number | Description | Published |
20100074396 | MEDICAL IMAGING WITH BLACK SILICON PHOTODETECTOR - Medical imaging may be accomplished with a high photoconductive gain at a relatively low operating voltage by employing a black silicon photodetector and integrating CMOS components with elements of the photodetector. | 03-25-2010 |
20120031325 | Crystal Growth Crucible Lid - A lid for a crystal growth chamber crucible is constructed by forming arcuate sector-shaped portions and coupling them in abutting relationship, for example by welding, to form an annular profile fabricated lid. The arcuate sector-shaped portions may be formed and removed from a lid fabrication blank with less waste than when unitary annular lids are formed and removed from a similarly sized fabrication blank. For example, the sector-shaped portions may be arrayed in an undulating pattern on the fabrication sheet. | 02-09-2012 |
20120055395 | CZOCHRALSKI CRYSTAL GROWTH PROCESS FURNACE THAT MAINTAINS CONSTANT MELT LINE ORIENTATION AND METHOD OF OPERATION - A Czochralski process (“CZ”) crystal growth method and furnace having a heater capable of generating a heating zone, a crucible within the heating zone and capable of retaining a volume of molten crystal growth material forming a melt line oriented in a designated position within the heating zone, a seed growth rod retractable from the crucible with a rod retraction mechanism, for forming a crystal boule thereon proximal the melt line from the molten crystal growth material. The furnace causes relative movement between the crucible and heating zone as the crystal boule is retracted, so that the melt line is maintained in the designated position within the heating zone. In some embodiments relative movement is based at least in part on sensed weight of the growing crystal boule. In other embodiments the crucible growth rod retraction mechanism are fixed relative to each other by a gantry. | 03-08-2012 |
20120080645 | Suppression Of Crystal Growth Instabilities During Production Of Rare-Earth Oxyorthosilicate Crystals - Disclosed are a method of growing a rare-earth oxyorthosilicate crystal and a crystal grown using the method. A melt is prepared by melting a first substance including at least one rare-earth element and a second substance including at least one element from group 7 of the periodic table. A seed crystal is brought into contact with the surface of the melt and withdrawn to grow the crystal. | 04-05-2012 |
20120126171 | Crystal Growth Atmosphere For Oxyorthosilicate Materials Production - A method of growing a rare-earth oxyorthosilicate crystal, and crystals grown using the method are disclosed. The method includes preparing a melt by melting a first substance including at least one first rare-earth element and providing an atmosphere that includes an inert gas and a gas including oxygen. | 05-24-2012 |
20120145963 | Rare-Earth Oxyorthosilicate Scintillator Crystals and Method of Making Rare-Earth Oxyorthosilicate Scintillator Crystals - A method of making LSO scintillators with high light yield and short decay times is disclosed. In one arrangement, the method includes codoping LSO with cerium and another dopant from the IIA or IIB group of the periodic table of elements. The doping levels are chosen to tune the decay time of scintillation pulse within a broader range (between about ˜30 ns up to about ˜50 ns) than reported in the literature, with improved light yield and uniformity. In another arrangement, relative concentrations of dopants are chosen to achieve the desired light yield and decay time while ensuring crystal growth stability. | 06-14-2012 |
20120145964 | Rare-Earth Oxyorthosilicate Scintillator Crystals and Method of Making Rare-Earth Oxyorthosilicate Scintillator Crystals - A method of making LSO scintillators with high light yield and short decay times is disclosed. In one arrangement, the method includes codoping LSO with cerium and another dopant from the IIA or IIB group of the periodic table of elements. The doping levels are chosen to tune the decay time of scintillation pulse within a broader range (between about ˜30 ns up to about ˜50 ns) than reported in the literature, with improved light yield and uniformity. In another arrangement, relative concentrations of dopants are chosen to achieve the desired light yield and decay time while ensuring crystal growth stability. | 06-14-2012 |
20130032722 | Radiation Detection With Optical Amplification - A device for detecting ionizing radiation includes a radiation interaction region configured to generate light in response to an interaction with the ionizing radiation, an optical gain medium region in optical communication with the radiation interaction region and configured to amplify the light, and an energy source coupled to the optical gain medium region and configured to maintain a state of population inversion in the optical gain medium region. The optical gain medium region has an emission wavelength that corresponds with a wavelength of the light generated by the radiation interaction region. | 02-07-2013 |
20130087711 | Rare-Earth Metal Halide Scintillators with Reduced Hygroscopicity and Method of Making the Same - The present disclosure discloses rare earth metal halide scintillators compositions with reduced hygroscopicity. Compositions in specific implementations include three group of elements: Lanthanides, (La, Ce, Lu, Gd or V), elements in group 17 of the periodic table of elements (CI, Br and I) and elements of group 13 (B, AI, Ga, In, TI), and any combination of these elements. Examples of methods for making the compositions are also disclosed. | 04-11-2013 |
20130087712 | Metal Halide Scintillators With Reduced Hygroscopicity and Method of Making the Same - The present disclosure discloses, in one arrangement, a scintillator material made of a metal halide with one or more additional group-13 elements. An example of such a compound is Ce:LaBr | 04-11-2013 |
20140021410 | Mixed Halide Scintillators - A mixed halide scintillator material including a fluoride is disclosed. The introduction of fluorine reduces the hygroscopicity of halide scintillator materials and facilitates tuning of scintillation properties of the materials. | 01-23-2014 |
20140097346 | Radiation Detection Utilizing Optical Bleaching - A method and device for improving the optical performance (such as time resolution) of scintillation detectors using the optical bleaching technique are disclosed. Light of a selected wavelength is emitted by a light source into a scintillator. The wavelength is selected to meet the minimum energy requirement for releasing of charge carriers captured by the charge carrier traps in the scintillation material. Trap-mediated scintillation components are thus reduced by optical bleaching and the optical performance of the scintillator crystal and the detector is enhanced. | 04-10-2014 |
20140203210 | Passivation of Metal Halide Scintillators - A halide material, such as scintillator crystals of LaBr | 07-24-2014 |
20140271436 | Rare Earth Oxyorthosilicate Scintillation Crystals - The use of the effect of crystallographic axis orientation on the effectiveness in annealing in multiple atmospheres and chemical compositions of lutetium oxyorthosilicate crystals and other scintillator crystals is disclosed. By controlling axis orientation an favorable annealing condition can be selected to repair both internal interstitial and vacancy defects through the crystal lattice. Axis orientation can be further utilized to control the uniformity of surface finish of chemically etched crystal. | 09-18-2014 |