Jackie R. Webster - Irvine CA David B. Chang - Tustin CA Keith V. Pearson - Long Beach CA
Assignee:
Hughes Aircraft Company - Los Angeles CA
International Classification:
G01N 2764
US Classification:
324469
Abstract:
An ion drag air flow meter (10) including a gas ionizer (16), an ion collector (14) and apparatus (30) for converting the collected ions into a signal providing an indication of the flow of a gas (40).
Jackie R. Webster - Irvine CA Keith V. Pearson - Wilmington CA David B. Chang - Tustin CA Norton L. Moise - Pacific Palisades CA Victor Vali - Laguna Hills CA
Assignee:
Hughes Aircraft Company - Los Angeles CA
International Classification:
G21K 106 G01N 23223 G01N 2320 G01T 136
US Classification:
378 85
Abstract:
A system for detecting the presence of known materials in a body or container. The system incorporates a gamma or X-ray source for irradiating the body with gamma rays to produce X-ray fluorescence of materials contained therein. A directionally discriminate X-ray detector is positioned to intercept X-rays emitted from the body and is adapted to pass only those X-rays having a predetermined wavelength and incident from a specific direction that are characteristic of a material of interest contained in the body. The detector includes a dislocation free single crystal having substantially parallel input and output surfaces. A second crystal aligned parallel to the first crystal may be disposed at a position offset from the first crystal to receive the X-rays transmitted by the first crystal in order to discriminate between materials fluorescing within the body. In a specific embodiment of the invention, the first detector comprises an elongated crystal which pass X-rays in accordance with the Borrmann effect. A plurality of the crystals are arranged in a linear array and the container is either scanned with the array or the container passed linearly past the array.
Fond du Lac, WII am a mother of three and a Grandmother of four!!! I love it. I am about to turn 46..... Oh boy the big 50 is around the corner. Good thing I don't feel like... I am a mother of three and a Grandmother of four!!! I love it. I am about to turn 46..... Oh boy the big 50 is around the corner. Good thing I don't feel like it. I am just loving life!!!