Speaker
Mr
Álvaro Dosil
(Universidade de Santiago de Compostela)
Description
The upgrade of the LHCb experiment, planned for 2018, will transform
the experiment to a trigger-less system reading out the full detector
at 40 MHz event rate. All data reduction algorithms will be executed
in a high-level software farm. The upgraded detector will run at luminosities of
2 x 10^33 /cm^2/s and probe physics beyond the Standard Model in the
heavy flavour sector with unprecedented precision.
The Vertex Locator (VELO) is the silicon vertex detector surrounding
the interaction region. The current detector will be replaced with
a hybrid pixel system equipped with electronics capable of reading out at
40 MHz. The detector comprises silicon pixel sensors with
55x55 um^2 pitch, read out by the VeloPix ASIC, from the TimePix/MediPix family. The hottest region will have pixel hit rates of 900 Mhits/s yielding a total data rate more
than 3 Tbit/s for the upgraded VELO.
The detector modules are located in a separate vacuum, separated from
the beam vacuum by a thin custom made foil. The detector halves are retracted when the beams are injected
and closed at stable beams, positioning the first sensitive pixel at
5.1 mm from the beams. The material budget will be minimised by the use of evaporative CO_2
coolant circulating in microchannels within 400 um thick silicon
substrates.
The current status of the VELO upgrade will be described and
latest results from irradiated sensor assemblies will be presented.
Summary
The LHCb VELO Upgrade will be presented, together with recent results
Collaboration
LHCb
Primary author
Dr
paula collins
(cern)
