New generation of efficient high resolution detector for 30-100keV photons

Abstract

For direct space X-ray imaging with an intrinsic spatial resolution of less than 10 µm scintillating detectors is used almost universally. For this detector type an inverse correlation exists between the spatial resolution and the detection efficiency which limits the performance. Structured scintillators are found to exhibit a high potential in terms of performance. The structured scintillator consists of a silicon matrix of holes filled with the phosphor material, CsI:Tl.. In this Ph.D. work structured scintillators have been fabricated and characterized. Resolutions down to 1.3 µm at 50 keV have been measured and compared to conventional scintillators a 3-5 times gain in efficiency has been found.

 

Speaker

Ulrik Lund Olsen

Censors

Robert Feidenhans'l, NBI KU
Henning Friis Poulsen, AFM Risø DTU
Søren Schmidt, AFM Risø DTU

Opponents

Sol M. Gruner, Cornell University, Ithaca
Heinz Grafsmaa, Desy, Hamburg