Speaker
Prof.
Apostolos Panagiotou
(University of Athens)
Description
CASTOR is a Cerenkov quartz-tungsten sampling calorimeter, installed in the very forward region of the CMS experiment at the LHC and covering the pseudorapidity range of −5.2 to −6.6. The calorimeter surrounds the beam pipe as a very compact structure of tungsten and quartz plates, with a depth of 10 interaction lengths. The granularity of 16 azimuthal sectors and 14 longitudinal sections (rings), 224 channels in total, allows for the reconstruction of shower profiles and the separation of the electromagnetic from the hadronic energy.
The very forward location of CASTOR and geometry of the shielding imply operation under high radiation dose and magnetic field. Except for some very particular regions, the calorimeter read-out with fine mesh PMTs demonstrates good performance under these tough conditions. The performance of the calorimeter and first operational experience in pp and HI collisions in the very forward region of CMS will be presented.
for the collaboration
On behalf of the CMS Collaboration
Primary author
Prof.
Apostolos Panagiotou
(University of Athens)
