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Single photon x-ray detection with a CCD image sensor.

R C Catura1, R C Smithson

  • 1Lockheed Palo Alto Research Laboratory, 3251 Hanover Street, Palo Alto, California 94304, USA.

The Review of Scientific Instruments
|February 1, 1979
PubMed
Summary
This summary is machine-generated.

Charge-coupled device (CCD) image sensors can detect and analyze individual X-rays, functioning as miniature solid-state detectors. This technology offers high spatial resolution and energy discrimination for advanced X-ray telescopes.

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Area of Science:

  • Astrophysics
  • Solid-state physics
  • X-ray astronomy instrumentation

Background:

  • X-ray astronomy relies on sensitive detectors for imaging and spectral analysis.
  • Current detectors face limitations in spatial resolution and energy discrimination.
  • Charge-coupled devices (CCDs) are widely used in digital imaging but their application in X-ray spectroscopy is an area of active research.

Purpose of the Study:

  • To investigate the capability of individual pixels in a CCD image sensor to detect and perform energy analysis of individual X-rays.
  • To evaluate the potential of CCDs as high-resolution, energy-discriminating sensors for X-ray astronomy.

Main Methods:

  • Individual X-ray photons with energies of 5.9 keV and 22.4 keV were directed at a CCD image sensor.
  • The energy of each detected X-ray was analyzed on a pixel-by-pixel basis.
  • The spatial resolution and energy discrimination capabilities of the CCD pixels were assessed.

Main Results:

  • The CCD image sensor successfully detected individual X-ray photons at specified energies.
  • Each pixel of the CCD demonstrated the ability to discriminate the energy of the detected X-rays.
  • The results confirm that CCDs function as an array of micro solid-state detectors.

Conclusions:

  • CCD image sensors can serve as effective X-ray detectors with both high spatial resolution and energy discrimination capabilities.
  • These findings highlight the suitability of CCDs for use as sensors at the focal plane of future X-ray telescopes.
  • The demonstrated performance suggests a promising avenue for advancing X-ray astronomy instrumentation.