Speaker
Description
The last couple of years have seen a large learning curve in Depleted Monolithic Active Pixel Sensors (DMAPS) fabricated with a process modification for increasing radiation tolerance. Two large scale prototypes: Monopix with a column drain synchronous readout, and Malta with a novel asynchronous architecture have been fully tested and characterised. This experience has shown that certain aspects have to be improved such as charge collection after irradiation and high data rate capabilities. Some improvements resulting from extensive TCAD simulations were verified on a small test chip, miniMalta. A detailed cluster analysis, with different sources, at different biases, for high and low thresholds and before and after irradiation will be covered in detail.
This presentation will further focus on the continuation of the development in this TowerJazz-180 nm technology, with a new submission foreseen for the end of this year, where the new process modifications will be applied on the large scale prototypes. A trigger memory will be as well added in the MonopixV2 chip.
The digital architecture for both chips will be reviewed capable of dealing with data rates of around 80 MHz/cm2 similar to what it is expected in the outer layer of the ATLAS inner tracker Upgrade. Simulations to study the data rate capability and output bandwidth using realistic hits generated by the ATLAS simulation engine Athena including special techniques like on-chip clustering and data compression will also be presented.
Finally, a longer-term outlook will be covered in the presentation.
| Submission declaration | Original and unpublished |
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