Abstract
The LHCb experiment is a single arm spectrometer, designed to study CP violation in B-decays and search for new physics in rare B-decays at the large hadron collider (LHC). In such studies it is crucial to accurately and efficiently track the charged decay products in the high-density environment of the LHC. For this, the outer tracker (OT) was constructed, consisting of 55,000 straw tubes and covering an area of 360 m 2 of module layers. The detector is foreseen to operate under large particle rates, up to 100 kHz/cm per straw in the region closest to the beam. Before and during installation the detector modules and front end (FE) electronics have been extensively tested. The detector has been installed and commissioned with the help of cosmic ray events.
Highlights
The LHCb experiment [1] has been tailored for the study of B-hadron physics
The Outer Tracker is a straw tube detector that covers the LHCb acceptance except for a small region around the beam pipe which is covered by the silicon strip based Inner Tracker detector
The halves are individually read out by Front End (FE) electronics boxes [4], that connects to feed-through boards that are built into the module
Summary
The LHCb experiment [1] has been tailored for the study of B-hadron physics It will precisely measure the Charge-Parity asymmetry in B-meson decays and it will probe physics beyond the Standard Model through rare B-decays. The Outer Tracker and Inner Tracker form the tracking system upstream of the LHCb magnet [1]. The Outer Tracker is a straw tube detector that covers the LHCb acceptance except for a small region around the beam pipe which is covered by the silicon strip based Inner Tracker detector. In order to have efficient B-hadron reconstruction, the tracking efficiency of charged particles should be excellent (∼100%). This in turn requires the straw occupancy to be less than 10%. The Outer Tracker has to cope with the 25ns bunch crossing cycle of the LHC
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