Micron resolution of MONCH and GOTTHARD, small pitch charge integrating detectors with single photon sensitivity

作者：Cartier, S.^*; Bergamaschi, A.; Dinapoli, R.; Greiffenberg, D.; Johnson, I.; Jungmann, J. H.; Mezza, D.; Mozzanica, A.; Schmitt, B.; Shi, X.; Stampanoni, M.; Sun, J.; Tinti, G.

来源：Journal of Instrumentation, 2014, 9(05): C05027.

DOI：10.1088/1748-0221/9/05/C05027

• Data processing methods
• Pattern recognition, cluster finding, calibration and fitting methods
• Front-end electronics for detector readout
• Data reduction methods

MONCH, a charge integrating readout ASIC (Application Specific Integrated Circuit) prototype with a pixel pitch of 25 mu m developed at PSI, allows new imaging applications in the field of micron resolution and spectral imaging. The small pixel size of this system facilitates charge sharing between pixels, which then can be exploited to gain additional information about the photon absorption position and photon energy.
However, for reconstructing complete images from this information, sufficient hits need to be recorded and therefore acquisition times are potentially long. We present a fast read-out system, that is capable of acquiring enough statistics for an image in a few hours in combination with a position reconstruction algorithm, which has the potential to run in a similar amount of time on a fast computing node.
We further present results of experiments with a comparable strip detector (small-pitch GOTTHARD system) showing that with the aid of single photon interpolation algorithms micron resolution is achievable. Additionally, we show that a similar position reconstruction algorithm works in the two dimensional case for MONCH.

• 出版日期2014-5
• 单位上海交通大学