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  • Improvements in Low Power, End window, Transmission-Target X-ray Tubes
    End-window transmission-target X-ray tubes are designed for very close anode-to-sample. coupling for compact portable XRF instruments. Several recent improvements have been. achieved to make these tubes considerably brighter, with better output stability and even smaller size and lower power
  • Miniature X-Ray Tubes Utilizing Carbon-Nano Tube Based Cold Cathodes
    The electron field-emission properties of carbon nanotubes enable the fabrication of cold. cathodes for a variety of vacuum device applications. The utilization of these cathodes is. an attractive alternative for the replacement of thermionic or hot cathodes for generating. X-rays. Miniature X-ray
  • Characterization Techniques for Miniature Low Power X-Ray Tubes
    as the spectral characterization of the tube. The beamspot. dimensions and location can be measured at several high-voltage settings to ensure. stability. This setup allows monitoring spectral contamination lines, total output flux, and. net target-peak intensity at the anode line. To ensure tube X-ray
  • Simultaneous XRD/XRF with low-power X-Ray tubes
    A test bench instrument constructed at Moxtek, Inc. is capable of simultaneously capturing x-ray diffraction (XRD) and x-ray fluorescence (XRF) information using a charge-coupled device (CCD) as the x-ray detector. NASA is funding the instrument's construction because of its low-power consumption
  • Luggage X-Ray Cooling
    The X-ray tube generates heat during operation and must be cooled to allow continuous operation. The cooling is accomplished by a standard chiller assembly including a liquid to air heat exchanger, a filter, a fluid reservoir and pump to move the fluid around the cooling circuit
  • Case Study: The Analog-Digital X-ray Machine
    The discovery of 'X-rays' was first reported at the end of 1895 when Wilhelm Conrad Röntgen was conducting experiments with electrostatic charges and cathode ray tubes. In 2008 we have such medical imaging technology as computed tomography (CT), magnetic resonance imaging (MRI), or positron
  • Medical Device Link .
    . It was for these reasons that device ) sought to replace the lead components in its computed tomography (CT) systems. �The electronic parts [located near the x-ray tube] in the CT scanner
  • Medical Device Link .
    integrity. Standard features include a 75-mm x-ray detector, an 80-kV 5- um x-ray tube, z-axis movement of the x-ray tube, a joystick-controlled variable-speed x-y stage with a 75 sample rotation fixture, and an image-processing cpu with a 17-in. liquid-crystal display flat-panel monitor. Designed
  • Residual Stresses In OTSG Tube Expansion Transitions (.pdf)
    of the. repair procedure. Based on this uncertainty, a project. was initiated to measure the residual stress. distribution and cold work in the Davis Besse roll. transition and in assorted rolled tube mockups, using. X-ray diffraction techniques and finite element. analysis. The objective was to determine

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