Vth School of Astroparticle Physics
23 - 28 May 2016
OHP, Saint Michel l'Observatoire

Physics of the Universe in X-rays

X-ray detectors

Jean-Luc SAUVAGEOT
  Astrophysique, Interpretation - Modélisation, Paris-Saclay (AIM)

Course
I will show how, from Ionization detectors to µ-Calorimeters, the detectors have evolved to improve spectral resolution while keeping the spatial and timing information.
Outline
  1. CCDs in X-Rays or how do we use CCDs to obtain an X-ray Photon List?
  2. How DePFETs array improve onto the CCDs observations?
  3. Use of CdTe for higher Energies
  4. Gratings: How wavelength dispersive spectroscopy overcomes the Fano factor
  5. The µCalorimeters & their exquisite spectral resolution.

Context

X-ray detectors are based on the ability of X-rays to transfer their energy by ionisation in semi-conductors or in thermal energy. The X-ray domain is the only one where one can have access for each observed photon to its position, energy, arrival time and even polarization!.

Jean-Luc Sauvageot has obtained his PhD in X-rays Astrophysics in 1988. He has worked in this field since this date. He worked first in EPIC CCDs Camera on board XMM/Newton, then on Clusters of galaxies Science. Since 8 years, he has started an R&D program to develop X-rays micro-calorimeters based on Metal-Insulator Sensors.

 

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