Bonn 2020 – scientific programme

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T: Fachverband Teilchenphysik

T 48: Pixel detectors III

T 48.2: Talk

Wednesday, April 1, 2020, 16:45–17:00, H-HS V

Powering studies for the Mu3e tracking detector — •Thomas Theodor Rudzki for the Mu3e collaboration — Physikalisches Institut, Universität Heidelberg

The tracking detector for the Mu3e experiment will use 50 µ m thin high-voltage monolithic active pixel sensors (HV-MAPS). Facing the construction of first prototype modules the powering of the sensors was examined in detail. The active components for the power supply will be situated up to 1 m away from the sensors inside the 1 T magnetic field provided by a superconducting solenoid. Power is provided by DC-DC converters based on air coils. The converters provide power with an intrinsic ripple of a few 10 mV. The modules consist of sensors mounted on high-density interconnects without any additional filters.

It was tested if MuPix8 is tolerating this ripple in the digital and analog part. Therefore, the MuPix setup was stripped down to operate the sensor with as few as possible filters on the supply inputs. This talk will present lab as well as testbeam measurements on the dependence of this powering scheme on the jitter in the serial links, noise, and efficiency.