A journey from design to full detector commissioning - Readout Electronics for the Scintillating Fibre Tracker of the LHCb Upgrade

by Xiaoxue Han (Ruprecht-Karls-Universitaet Heidelberg (DE))

Tuesday 14 Sept 2021, 09:00 → 10:00 Europe/Zurich

Zoom details are in the invitation email.

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Abstract:

The LHCb detector is being upgraded during the LS2 of the LHC in order to cope with higher instantaneous luminosities and to read out data at 40MHz using a trigger-less read-out system. The LHCb main tracking system, previously a silicon and straw-tube hybrid, will be replaced by a single homogeneous Scintillating Fibre (SciFi) Tracker. The detector is built from 250μm-diameter plastic fibres. The scintillation light is sensed by arrays of multichannel silicon photomultipliers (SiPMs). The electrical SiPM signals are collected and processed by a custom-designed low power ASIC, PACIFIC, which comprises a tunable fast shaper for each channel, two interleaved gated integrators, and three threshold-configurable comparators for digitization. Clustering and zero suppression are done in an on-board FPGA. The packaged data is transmitted to the LHCb common DAQ system via GigaBit Transceiver (GBT) chipsets. The LHCb SciFi Tracker will cover a full detector area of 340m2 read out by more than 500,000 SiPM channels, whilst providing a single hit resolution better than 80μm.

The seminar will start with a general introduction to the SciFi Tracker, then focus on the design of the ASIC and the structure of the front-end electronics, sharing the experience from the sub-component design validation, system integration tests, mass production quality assurance, right up to the final detector assembly and commissioning which is ongoing.

 

CERN_ESE_seminar_2021_XiaoxueHan.pdf