arXiv subjects

Lars Olivier Sebastian Noehte

Publications and source records attributed to Lars Olivier Sebastian Noehte.

3 recordsLinked to original sources

arXiv2022

CMS Phase-1 Pixel detector refurbishment during LS2 and readiness towards the LHC Run-3

The CMS Phase-1 pixel detector was extracted from the underground cavern after the end of the LHC Run-2 in 2019 and has been kept cold to protect the silicon sensors during the long shutdown period (LS2) in 2019-2021. The LHC is now preparing for the next installment of the data taking beginning 2022. The Phase-1 pixel detector is scheduled to be installed this year and is going through a series of refurbishment and repairs to improve the quality of the collected data and enhance the operational experience. The innermost barrel layer has been replaced with new modules and features improved readout chips (PROC600v4), front-end ASICs (TBM10d), and circuit boards to rectify the issues discovered during the previous data taking. The forward pixel detector has been equipped with new cooling inlets for safe handling and features a revised high-voltage power distribution scheme to better match the low-voltage granularity. All the DC-DC converters have been replaced with a new production, consisting of an improved ASIC (FEAST2.3) to prevent them from breaking during operation. Overall, this talk will summarize the refurbishment work of the pixel detector during LS2, and highlight the readiness towards the LHC Run-3 after installation and commissioning.

physics.ins-det↗

arXiv2020

MuPix10: First Results from the Final Design

Many years of research and development of High Voltage Monolithic Active Pixel Sensors (HVMAPS) have culminated in the final design for the Mu3e pixel sensor. MuPix10 is a fully monolithic sensor with an active pixel matrix size of $20\times20\,\mathrm{mm}^2$ produced in the $180\,\mathrm{nm}$ HV-CMOS process at TSI Semiconductors. The pixel size is $80\times80\,\mathrm{μm}^2$. Hits are read out using a column-drain architecture and sent over up to four serial links with up to $1.6\,\left.\mathrm{Gbit}\middle/\mathrm{s}\right.$ each. By means of DC/DC converters and exclusive usage of on-chip biasing, MuPix10 is fully operable with a minimal set of electrical connections. This is an integral requirement by the Mu3e experiment since it enables the construction of ultra-thin pixel modules with $0.1\,$% of a radiation length per layer. First results from lab characterisation and testbeam campaigns are presented.

physics.ins-det↗

arXiv2020

Mechanics, readout and cooling systems of the Mu3e experiment

Mu3e is an upcoming experiment at Paul Scherrer Institut in the search for the strongly suppressed decay of $μ\rightarrow eee$. It will use an ultra-lightweight silicon pixel detector using thinned HV-CMOS MAPS chips. Multiple Coulomb scattering is further kept under control with using high density interconnects made of aluminium and operating the detector in a helium atmosphere. More than 1 m2 of instrumented surface will produce about 3.3 kW of heat ($\leq$ 250 mW/cm2). Traditional cooling approaches are in conflict with the low-mass requirements, hence a gaseous helium flow cooling system will be implemented. This talk will give a report on the successful data transmission tests with the aluminium interconnects at target speeds of 1.25 Gbit/s under realistic condition. The final proof-of-concept of the helium cooling has been achieved with comprehensive cooling simulations and successfully confirmed with laboratory measurements using a full-scale mock-up of the vertex pixel detector.

physics.ins-det↗