Dortmund 2021 – scientific programme

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T: Fachverband Teilchenphysik

T 64: Pixel Detectors III

T 64.2: Talk

Wednesday, March 17, 2021, 16:15–16:30, Tn

The tracking detector of the P2 experiment at the MESA accelerator — •Lars Steffen Weinstock for the P2 collaboration — PRISMA+ Cluster of Excellence and Institute of Nuclear Physics, Johannes Gutenberg University Mainz

The Mainz Energy-recovering Superconducting Accelerator (MESA) will begin its operation in 2024. One of the experiments planned at MESA is P2. The goal of P2 is to determine the electroweak mixing angle with unprecedented precision at low energy scales by measuring the parity violating asymmetry in proton-electron scattering at low momentum. A key parameter for the analysis, the electron momentum transfer during scattering, is measured by the P2 tracker, which is placed inside the 0.6 T solenoid spectrometer. The tracker consists of eight identical modules utilising a total of 5000 novel High Voltage Monolithic Active Pixel Sensors (HV-MAPS) for precise track reconstruction. The event rate is expected to be 0.1 THz; This, in combination with the high number of readout channels, poses challenging requirements to the tracker front-end with regards to radiation hardness and data acquisition rate. This talk will give an overview of the P2 tracker, the requirements driving its design, and the current state of development.