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Related Concept Videos

X-ray Imaging01:24

X-ray Imaging

German physicist Wilhelm Röntgen (1845–1923) was experimenting with electrical current when he discovered that a mysterious and invisible "ray" would pass through his flesh but leave an outline of his bones on a screen coated with a metal compound. In 1895, Röntgen made the first durable record of the internal parts of a living human: an "X-ray" image (as it came to be called) of his wife’s hand. Scientists worldwide quickly began their own experiments with X-rays, and by 1900, X-ray was widely...
X-ray Crystallography02:18

X-ray Crystallography

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Computed Tomography01:10

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The instrumentation of atomic emission spectrometry (AES) involves various components, including atomization devices that convert samples into gas-phase atoms and ions. There are two main types of atomization devices: continuous and discrete atomizers.  Continuous atomizers, like plasmas and flames, introduce samples in a constant stream, while discrete atomizers inject individual samples using syringes or autosamplers. The most common discrete atomizer is the electrothermal atomizer.
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Applying X-ray Imaging Crystal Spectroscopy for Use as a High Temperature Plasma Diagnostic
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Published on: August 25, 2016

The X-Ray CCDs Developed for the Joint European X-Ray Telescope.

A Owens1, A F Abbey, H Brauninger

  • 1Department of Physics and Astronomy, University of Leicester, Leicester, LEI 7RH, United Kingdom.

Journal of X-Ray Science and Technology
|February 11, 2011
PubMed
Summary
This summary is machine-generated.

The Joint European X-ray Telescope (JET-X) charge-coupled devices (CCDs) were calibrated for x-ray response. Researchers achieved high precision (~1%) in calibrating quantum efficiency, energy resolution, and system gain for flight detectors.

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Area of Science:

  • Astronomy and Astrophysics
  • Detector Physics
  • X-ray Astronomy

Background:

  • The Joint European X-ray Telescope (JET-X) mission requires highly accurate focal plane detectors.
  • Charge-coupled devices (CCDs) are critical components for x-ray detection in space missions.
  • Previous characterization methods may not meet the stringent precision requirements for advanced telescopes.

Purpose of the Study:

  • To comprehensively characterize the x-ray response of flight model CCDs for the JET-X mission.
  • To calibrate key performance parameters including quantum efficiency, energy resolution, and system gain.
  • To achieve a calibration precision of approximately 1% for critical detector metrics.

Main Methods:

  • Detailed description of the development program and performance of JET-X CCDs.
  • Combination of discrete line measurements (University of Leicester), synchrotron measurements (Daresbury SRS), and calculations for quantum efficiency.
  • Absolute normalizations using x-ray long beam pipe measurements (MPE Panter test facility).

Main Results:

  • Demonstrated the possibility of calibrating quantum efficiency to better than 1%.
  • Achieved calibration of FWHM energy resolution below 1% precision.
  • Successfully calibrated the system gain of the flight CCDs to better than 1%.

Conclusions:

  • The comprehensive calibration strategy enables achieving the required ~1% precision for JET-X focal plane detectors.
  • The characterized CCDs are suitable for high-precision x-ray measurements in space.
  • This work provides a robust methodology for calibrating sensitive x-ray detectors for future missions.