Marco Ramilli (Paul Scherrer Institut)
MÖNCH is a hybrid silicon pixel detector based on charge integration and with analog readout, featuring a pixel size of 25x25 μm2. Several prototypes have been commissioned, aimed at experimenting different solutions to optimize the detector performances for high and low flux applications at synchrotrons and X-FELs. With an ENC of the order of 35 electrons RMS, MÖNCH is competitive with monolithic detectors and with CCDs in the fields of high resolution imaging and soft X-ray detection below the keV level, and its kHz frame rate capability can substantially shorten the time needed for a single measurement. Due to its extremely small pixel pitch, MÖNCH intrinsically features an elevate position resolution which, in low flux condition, can even overcome the pixel size: charge sharing between neighboring pixel can be exploited in position interpolation algorithms which can achieve a sub-micron resolution. In order to achieve the high dynamic range required by XFEL experiments, one of the MÖNCH prototypes features a dynamic gain switching pixel architecture, which allows to adapt the pixel gain setting to the impinging photon flux. Characterization results of different MÖNCH prototypes in terms of bump-bonding yield, linearity, dynamic range and position resolution will be shown, together with preliminary measurements. Finally, the perspective for the realization of a future low energy detector using 4x3 cm2 modules will be discussed.
Anna Bergamaschi (PSI) Bernd Schmitt (Paul Scherrer Institut) Davide Mezza (Paul Scherrer Institut) Davit Mayilyan (Paul Scherrer Institut) Dominic Greiffenberg (Paul Scherrer Institut) Erik Fröjdh (Paul Scherrer Institut) Gemma Tinti (p) Marco Ramilli (Paul Scherrer Institut) Martin Brückner (Paul Scherrer Insititut) Roberto Dinapoli (Paul Scherrer Institut) Sebastian Francis Cartier (P) Dr Xintian Shi (Paul Scherrer Institute) aldo mozzanica (PSI)