Indisponibilité programmée / Scheduled outage
2-7 May 2010
Oustau Calendal Conference Center
Europe/Paris timezone
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Alignment and monitoring of the LHCb RICH detectors with data

6 May 2010, 10:50
Oustau Calendal Conference Center

Oustau Calendal Conference Center

Cassis, France
Oral presentation Technological aspects of Cherenkov detectors Technological aspects of Cherenkov detectors


Mr Christopher Blanks (Imperial College, London)


Hadron identification in the LHCb experiment is performed by Ring Imaging Cherenkov (RICH) detectors. The system is composed by two RICH detectors, three radiators, imaging optics and 484 Hybrid Photon Detectors (HPDs). The refractive index of the radiators (16 aerogel tiles, C4F10 and CF4) is calibrated using saturated (beta=1) tracks and expected changes due to atmospheric pressure variations are monitored with data and sensors. The 116 mirrors in the imaging system require alignment to an accuracy of 0.1 mrad and the position of the photon detectors needs to be accurate to 0.5 mm. Tools integrated in the system allowing to achieve this goal will be described. Once successfully commissioned the RICH detectors, they can be calibrated using the first collision data from the LHC. Their performance in particle identification will depend crucially on the accuracy with which the components will be aligned and the different corrections applied.
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Primary author

Mr Christopher Blanks (Imperial College, London)

Presentation Materials