Speaker
Roberto Dinapoli
(Paul Scherrer Institut)
Description
MÖNCH is a novel hybrid silicon pixel detector based on charge integration and analog readout, featuring a challengingly small pixel size of 25x25 μm2. It is a research project which aims to push the development of hybrid pixel detectors to its limits in terms of photon flux, position resolution, energy information and low energy detection.
MOENCH02 is a fully functional, small scale prototype of 4x4mm2, containing an array of 160x160 pixels, designed in UMC 110nm technology [1]. This array is subdivided in five sub blocks, each featuring a different pixel architecture. The first block targets high resolution, low flux synchrotron applications, as RIXS (resonant inelastic X-ray scattering) or X-ray tomography with X-ray tubes. In this case the charge sharing effect between pixels, together with the signal analog readout, can be exploited to interpolate the hit position with a precision that could reach the sub-μm resolution.
The first characterization results of this sub block of MÖNCH02 in terms of bump-bonding yield, linearity, dynamic range and energy resolution will be shown. The noise performance will be presented in more detail, showing a total noise as low as <40 e-, as well as an overview of the noise contribution of the different blocks, from the amplifier to the off-chip buffer. The latest version of the interpolation algorithm and tests showing its effectiveness in obtaining sub-pixel resolution will also be shown.
The encouraging results obtained lead to the design of a bigger size prototype, MÖNCH03. MÖNCH03 has an active area of 5x10mm2 and it contains an array of 200x400 identical pixels, based on the first block of MÖNCH02. Several improvements are implemented in the chip periphery and in the readout system, which should result in a final frame rate of ~8 kHz.
Summary
MÖNCH is a novel hybrid silicon pixel detector based on charge integration and analog readout, featuring a challengingly small pixel size of 25x25 μm2. It is a research project which aims to push the development of hybrid pixel detectors to its limits in terms of photon flux, position resolution, energy information and low energy detection.
MOENCH02 is a fully functional, small scale prototype of 4x4mm2, containing an array of 160x160 pixels. The first characterization results of the main sub block of MÖNCH02 in terms of bump-bonding yield, linearity, dynamic range and energy resolution will be shown, as well as latest results on sub-micron resolution using interpolation algorithms.
Primary author
Roberto Dinapoli
(Paul Scherrer Institut)
Co-authors
Anna Bergamaschi
(PSI)
Bernd Schmitt
(Paul Scherrer Institut)
Dominic Greiffenberg
(PSI)
Gemma Tinti
(PSI)
Julia Helga Smith-Jungmann
(Unknown)
Sebastian Francis Cartier
(PSI)
Xintian Shi
(PSI)
aldo mozzanica
(PSI)
