Speakers
Description
Detector-related systematics effects will become increasingly critical in the planned ''LS3-enhancements'' and ''Upgrade-II'' phases for the RICH detectors of the LHCb experiments at CERN LHC, due to the large photo-detector occupancy caused by the large particle flux in the high-luminosity environment.
Therefore, the requirements for calibration, alignment and monitoring will be even more stringent than for the current Run-3 detector, requiring new specialized systems to control and mitigate systematics effects.
Therefore, a system, called ''CalAliMon'', has been designed,
to exploit the Rayleigh scattered light from pulsed laser beams traveling in front of and parallel to the photo-detector assembly plane.
The minimally invasive system, after taking into account for the simple geometry and kinematics of photon transport, will allow time alignment and relative pixel-to-pixel calibration, in a first phase, and,
after an upgrade during LS4, the measurement of absolute photo-detection efficiency.
The design, the first simulation results and first laboratory tests will be presented.
