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T: Fachverband Teilchenphysik

T 64: Kalorimeter 2

T 64.2: Vortrag

Mittwoch, 11. März 2015, 17:00–17:15, G.10.03 (HS 8)

Calibration of the CMS HCAL Outer SiPMs with cosmic muons — •Artur Lobanov and Benjamin Lutz — DESY, Hamburg

The CMS Outer Hadron Calorimeter (HO) is the first large-scale hadron collider detector to use Silicon Photomultipliers (SiPMs), replacing previously used Hybrid Photodiodes (HPDs). The upgrade of the readout electronics was performed during the first long shutdown of the LHC. By April 2014 the installation of 2376 channels has been completed. We report on the system design, installation and commissioning of the detector.

In addition to the commissioning, the installation is verified using cosmic muons. These cosmic data has been taken exploiting the HO's self-trigger ability, which also allows to perform an initial cosmic-muon calibration, preceding the calibration with pp-collision data during the 2015 LHC run. We also report on a muon calibration obtained from global runs including the CMS muon system, where we show a good agreement with the previous results.