Speaker
Aldo Mozzanica
(Paul Scherrer Institut)
Description
The pulsed beam of the new generation of FEL (Free Electron Laser) based X-ray sources
places several challenges to the detector development: in particular the photon counting readout,
a successful scheme in case of Synchrotron sources, cannot be used any longer. At the same time the data quality of photon counting
systems, i.e. the low noise and the high dynamic range, is essential from an experimental point of view.
In this context PSI has developed GOTTHARD, a charge integrating silicon strip detector which, thanks to a novel automatic
gain switching feature, can provide single photon resolution, a dynamic range of 10000 12keV photons and a noise well below the
photon statistics limit over the full dynamic range.
The detector module is composed from 10 readout ASIC (Application Specific Integrated Circuit) wire bonded to a single silicon sensor with a 64x8mm^2 sensitive area for a total of 1280 channels at 50um pitch. A complete readout chain, from the high speed ADCs to the Gbit link for the data download, is also integrated on the board. Burst frame rates up to 1MHz (60kHz in continuous streaming) are achievable with the system.
The detector and ASIC design will be presented together with the results from the characterization measurements.
The performances of the system in XFEL and Synchrotron source applications will be discussed.
Primary author
Aldo Mozzanica
(Paul Scherrer Institut)
Co-authors
Anna Bergamaschi
(Paul Scherrer Institut)
Beat Henrich
(Paul Scherrer Institut)
Bernd Schmitt
(Paul Scherrer Institut)
Christian Ruder
(Paul Scherrer Institut)
Dhanya Maliakal
(Paul Scherrer Institut)
Dominic Greiffenberg
(Paul Scherrer Institut)
Ian Johnson
(Paul Scherrer Institut)
Roberto Dinapoli
(Paul Scherrer Institut)
Valeria Radicci
(Paul Scherrer Institut)
Xintian Shi
(Paul Scherrer Institut)
