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  • 1
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    High-resolution imaging with a two-dimensional resistive anode photon counter (1982)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: A method to achieve high spatial resolution readout of individual photoelectron events using microchannel plates and a resistive anode is presented. A clamped pair of microchannel plates is used, followed by a gap and a clamped triplet of microchannel plates in cascade to achieve a high stable electron gain of 3 x 10 to the 7th. The gain allows the position determination of each photoelectron event with a very high signal-to-noise ratio. A model consisting of a windowless vacuum-ultraviolet image sensor is presented to demonstrate 500 x 500 pixel images of 50 micron FWHM over a 25-mm circular field of view. The detector offers sufficient speed, sensitivity and resolution for a variety of applications, and the mount design is compatible with planar, remotely-processed, proximity-focused photocathodes.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Review of Scientific Instruments; 53; May 1982
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Detection of hydrogen in air by means of alkali ion current from hot palladium. (1967)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Surface ionization detector of hydrogen in presence of air at one atm
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: REVIEW OF SCIENTIFIC INSTRUMENTS
    Format: text
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 3
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    Unknown
    Low-distortion resistive anodes for two-dimensional position-sensitive MCP systems (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Microchannel plates (MCPs) are frequently used with resistive anodes to detect charged particles or photons and yield analog signals from which event positions can be decoded. The paper discusses a four-corner concave circular arc terminated resistive anode that permits theoretically distortionless encoding of Cartesian event positions into pulse charge ratios. The theory of the circular arc terminated anode is discussed along with anode design and performance. Electron beam images obtained by using such an anode are presented to confirm the usefulness of the approach.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Review of Scientific Instruments; 50; Sept
    Format: text
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
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