Design and commissioning of a setup to measure the timing resolution of silicon pixel detectors

by Niclas Sommerfeld (Universität Bonn)

Thursday 6 Jul 2023, 13:00 → 14:00 Europe/Berlin

CP-03-123 (TU Dortmund)

With the upgrade during LS4, the instantaneous luminosity at the LHCb experiment will increase by almost one order of magnitude to 1.5 × 1034 cm⁻²s⁻¹. With this in- creased data rate the untriggered readout of the LHCb detector provides changeless for the tracking detectors. The downsteam tracker (Mighty Tracker) will be instrumented with HV-CMOS pixel sensors in the central part. To assign each hit to the correct bunchcrossing, a timing resolution of 3 ns is needed to contain 4 sigma of the hits in a 25 ns window. To measure the timing resolution of the MightyPix in the lab, a timing setup is required. The ongoing development of a generalized timing layer will be presented within this talk. The setup consists of a fast plastic scintillator, readout with two SIPMs and a logic board with configurable, standardized outputs. Custom PCBs are designed for the amplifier circuit and logic board. The scintillator, SiPMs and amplifiers are housed in a light tight 3D printed enclosure. The modular design allows to use this setup in a variety of applications. The method to measure the timing resolution of the timing setup, as well as first measurements of said resolution are shown in this talk.

slides.pdf