Optimization of <= 200 mu m pitch CZT detectors for future high-resolution X-ray instrumentation in astrophysics

Academic Article


  • Cadmium Zinc Telluride and Cadmium Telluride are the detector materials of choice for the detection of X-rays in the X-ray energy band E >= 5keV with excellent spatial and spectral resolution and without cryogenic cooling. Owing to recent breakthroughs in grazing incidence mirror technology, next-generation hard X-ray telescopes will achieve angular resolution between 5 and 10 arc seconds - about an order of magnitude better than that of the NuSTAR hard X-ray telescope. As a consequence, the next generation of X-ray telescopes will require pixelated X-ray detectors with pixels on a grid with a lattice constant of <= 250um. Additional detector requirements include a low energy threshold of less than 5keV and an energy resolution of less than one keV. The science drivers for a high angular-resolution X-ray mission include studies and measurements of black hole spins, the cosmic evolution of super-massive black holes, active galactic nuclei feedback, and the behaviour of matter at very high densities. In this contribution, we report on our R&D studies with the goal to optimise small-pixel Cadmium Zinc Telluride and Cadmium Telluride detectors.
  • Authors

  • Zajczyk, Anna
  • Draper, Marie
  • Dowkontt, Paul
  • Guo, Qingzhen
  • Kislat, Fabian
  • Krawczynski, Henric
  • De Geronimo, Gianluigi
  • Li, Shaorui
  • Beilicke, Matthias
  • Status

    Publication Date

  • 2014
  • Keywords

  • CdTe
  • CdZnTe (CZT)
  • X-ray astronomy
  • performance
  • pixelization
  • semiconductor detector
  • Digital Object Identifier (doi)

    Start Page

  • 921308
  • Volume

  • 9213