LHCb - Readout system for the phase I of the LHCb VELO upgrade

The LHCb detector is being upgraded (during LS2 of the LHC) in order to cope it with a luminosity 5 times the the old detector and to remove the hardware trigger that will allow the operation the detector only with a pure software trigger. The tracking system of the detector is also being upgraded. A key part of this system is the VErtex LOcator (VELO) that is the primary tracking and vertex detector that surrounds the interaction point. The upgraded VELO will use a pixel detector read out at the LHC rate. This poster shows the specific electronics in the cavern and on the surface of LHCb needed to operate the VELO sub-detector. A especial emphasis is made on the VELO specific firmware of the back-end board (so-called PCIe40) and its different firmware flavours that configure its function in the experiment: SOL40 board dedicated to the Experiment Control System (ECS), Timing and Fast Control (TFC) and TELL40 board dedicated to the Data AcQuisition (DAQ). A lite version of the firmware, dedicated for production and hardware testing, which does not process the data is also presented.