Hamburg 2016 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 33: Detektorsysteme I
T 33.4: Vortrag
Montag, 29. Februar 2016, 17:35–17:50, VMP8 SR 205
A new luminometer and beam conditions monitor for the CMS experiment. — •Olena Karacheban1,2, Anne Dabrowski3, Hans Henschel2, Maria Hempel1,2, Wolfgang Lange2, Jessica Leonard4, Itamar Levy5, Wolfgang Lohmann1,6, Dominik Przyborowski7, Vladimir Ryjov3, Sergej Schuwalow2,4, David Stickland3, Roberval Walsh4, and Agnieszka Zagozdzinska3 — 1Brandenburg University of Technology, Cottbus — 2DESY-Zeuthen, Germany — 3CERN, Geneva, Switzerland — 4DESY-Hamburg, Germany — 5Tel Aviv University, Tel Aviv, Israel — 6RWTH Aachen University, Aachen, Germany — 7AGH-UST University, Cracow, Poland
The luminosity is a key quantity of any collider, which allows for the determination of the absolute cross sections from the observed rate in a detector. The Fast Beam Conditions Monitor (BCM1F) was upgraded in the last LHC long technical stop (LS1) to 24 diamond sensors read out by a dedicated fast ASIC in 130 nm CMOS technology. The backend comprises a deadtime-less histogramming unit, with a 6.25 ns bin width, in VME standard. A microTCA system with better time resolution is in development. BCM1F is used for luminosity and machine induced background measurements at the CMS experiment. The performance of the detector in the first running period, as well as results on the calibration (Van-der-Meer scan) and the measurements of the luminosity will be presented.