Speaker
Mrs
Stefanie Elbracht-Leong
(University of Melbourne)
Description
MYTHEN is a single photon counting hybrid strip X-ray detector that has found application in powder diffraction (XRPD) experiments at synchrotrons worldwide. Originally designed to operate with a silicon sensor, MYTHEN is ideally suited for detecting X-rays from 3-16 keV, however many XRPD beamlines have been designed for energies above 50keV. In order to adapt Mythen to meet these demands the absorption efficiency of the sensor must be substantially increased.
Cadmium-Telluride (CdTe) has demonstrated an absorption efficiency approximately 30 times that of silicon at 50 keV, and is therefore a very promising replacement candidate for silicon. Further, the large dynamic range of the pre-amplifier of MYTHEN and its double polarity has enabled two different configurations of CdTe sensors to be bonded and investigated. The first system has been used in an ohmic like electrons collecting processing, while the second system was used in a Schottky like holes collecting fashion. Both CdTe MYTHEN systems have undergone a series of characterisation experiments including stress test of bias and radiation induced polarizations. The performance comparison of both systems will be presented and discussed.
Author
Mrs
Stefanie Elbracht-Leong
(University of Melbourne)
Co-authors
Anna Bergamaschi
(PSI)
Bernd Schmitt
(Paul Scherrer Institut)
Dr
Bryn Sobott
(University of Melbourne)
David Peake
(The University of Melbourne)
Dr
Dominic Greiffenberg
(Paul Scherrer Institute)
Hidenori Toyokawa
(Japan Synchrotron Radiation Research Institute)
Roger Paul Rassool
(A)
