Speaker
Description
Optional extended abstract
The upgrade of the LHCb experiment, planned for 2018, will transform the entire readout to a triggerless system operating at 40 MHz.
All data reduction algorithms will be executed in a high level software farm, with access to all event information. This will enable the detector to run at luminosities of above 2x10^33 cm-2s-1 and explore New Physics effects in the beauty and charm sector with unprecedented precision.
The vertex detector will have to cope with radiation levels of up to 10^16 1 MeV neutron equivalents / cm^2, more than an order of magnitude higher than those expected at the current experiment. A solution is under development for a hybrid pixel detector, be based on 55 x 55 micron square pixels. A dedicated ASIC development is underway for a new FE chip, dubbed VELOPix, from the Timepix/Medipix family of chips. The chip will be radiation hard and be able to cope with pixel hit rates of above 500 MHz, highly non-uniformly distributed over the ~2 cm^2 chip area. It will incorporate local intelligence in the pixels for time-over-threshold measurements, time-stamping and sparse readout. The material budget will be optimised with the use of novel heat dissipation techniques and sensor and ROC thinning. In addition a micro-strip solution is as also under development, with finer pitch, higher granularity and lower mass than the current detector. The lightweight radiation-hard assembly will integrate evaporative CO2 cooling for which microchannel cooling is being considered as an alternative to diamond or TPG heat spreading planes. Technological challenges include the module design, the construction of a lightweight foil to separate the primary and secondary LHC vacuua, the use of high speed cables, and the metallisation and radiation qualification of the module. The current status will be described together with a presentation of recent testbeam results.
for the collaboration
LHCb
