Speaker
Description
The planned upgrade of LHC leading to the High-Luminosity Large Hadron Collider (HL-LHC) imposes new requirements on the detectors in terms of particle rates and radiation. We have addressed these demands by developing depleted monolithic active pixel sensors (DMAPS) employing high resistivity substrates and high bias voltage at the same time. Full size pixel matrix prototypes with complete readout architecture have been designed and characterized, one employing a large electrode and one a small electrode approach in LFoundry 150 nm and TowerJazz 180 nm technology, respectively.
These prototypes, LF-Monopix and TJ-Monopix, use a column drain readout architecture. LF-Monopix is designed with a large charge collection electrode where readout electronics are placed inside which generally offers homogeneous electrical field in the sensor and short drift distances. TJ-Monopix employs a small charge collection electrode with separated readout electronics and an additional n-type implant to achieve full depletion of the sensitive volume.
This approach offers a low detector capacitance and smaller achievable pixel size at a low power consumption. Different flavors in both designs allow for a study of minor modifications in the pixel design.
The chips have been characterized with regard to their usage in high radiation environments like the future ATLAS ITk at HL-LHC.
In this talk, recent results from lab tests with radioactive sources and X-ray irradiations will be presented. Furthermore, an overview of ongoing work towards future chips in both CMOS technologies will be shown.
| Submission declaration | Original and unpublished |
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