Speaker
Description
The LHCb experiment has recently been upgraded in the second long
shutdown of LHC. The new Vertex Locator (VELO) is composed of 52
modules with hybrid pixel detector technology. The new detectors
have performed very well throughout the first year of Run 3 of the
LHC, but face new operational challenges with increased radiation
damage foreseen till the end of this run. The cumulative radiation
damage poses challenges in reaching full depletion in the most
irradiated zones of the detectors, which have highly non-uniform
exposure, reaching fluences of $0.02-8\times 10^{15}$ 1
MeV-n$_{\text{eq}}$ cm$^{-2}$ in the same sensor. The overall damage
is monitored through regular measurements of the leakage current and
charge collection efficiency (CCE) as function of the bias voltage.
The results in evaluating the radiation damage and detector
performance throughout the first year of operation in LHC run 3 will
be presented.
