The LHCb detector LHCb experiment

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the lhcb collaboration s logo



subsystems

the vertex locator (velo) during construction.


the vertex detector (velo) built around proton interaction region. used measure particle trajectories close interaction point in order precisely separate primary , secondary vertices.


the detector operates @ 7 millimetres (0.28 in) lhc beam. implies enormous flux of particles; velo has been designed withstand integrated fluences of more 10 p/cm per year period of 3 years. detector operates in vacuum , cooled approximately −25 °c (−13 °f) using biphase co2 system. data of velo detector amplified , read out beetle asic.


the rich-1 detector (ring imaging cherenkov detector) located directly after vertex detector. used particle identification of low-momentum tracks.


the main tracking system placed before , after dipole magnet. used reconstruct trajectories of charged particles , measure momenta. tracker consists of 3 subdetectors:



the tracker turicensis, silicon strip detector located before lhcb dipole magnet
the outer tracker. straw-tube based detector located after dipole magnet covering outer part of detector acceptance
the inner tracker, silicon strip based detector located after dipole magnet covering inner part of detector acceptance

following tracking system rich-2. allows identification of particle type of high-momentum tracks.


the electromagnetic , hadronic calorimeters provide measurements of energy of electrons, photons, , hadrons. these measurements used @ trigger level identify particles large transverse momentum (high-pt particles).


the muon system used identify , trigger on muons in events.








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