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Crossed grid anode and its image partitioning.

G Knapp1

  • 1Center for Astrophysics, Harvard College Observatory/Smithsonian Astrophysical Observatory, Cambridge, Massachusetts 02138.

The Review of Scientific Instruments
|July 1, 1978
PubMed
Summary
This summary is machine-generated.

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This study demonstrates fast charge propagation in a crossed grid anode, achieving a temporal resolution of 100 ns. It also introduces a figure of merit for estimating photoelectron position uncertainty in imaging systems.

Area of Science:

  • Physics
  • Instrumentation
  • Electronics

Background:

  • Microchannel plate detectors are crucial for imaging applications.
  • Accurate position and timing information is vital for high-resolution imaging.
  • Existing anode designs may have limitations in speed and position accuracy.

Purpose of the Study:

  • To investigate the charge propagation characteristics of a crossed grid anode.
  • To determine the temporal resolution achievable with this anode design.
  • To develop and evaluate position-sensitive algorithms for partitioned anode systems.

Main Methods:

  • Measurements were performed on an imaging crossed grid anode coupled with microchannel plates.
  • Charge propagation was analyzed, focusing on wire-to-wire capacitances.

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  • Position algorithms for two-, three-, and four-amplifier systems were derived and discussed.

    • Main Results:

    • Fast charge propagation was observed, attributed to wire-to-wire capacitances.
    • A temporal resolution of 100 nanoseconds was indicated by the measurements.
    • A figure of merit was proposed for quantifying position uncertainty in the image plane.

    Conclusions:

    • The crossed grid anode exhibits excellent temporal resolution suitable for fast timing applications.
    • The proposed figure of merit provides a valuable metric for evaluating anode performance.
    • The presented position algorithms offer practical solutions for precise photoelectron localization.