Upgraded fast beam conditions monitor for CMS online luminosity measurement

Jessica Lynn Leonard, Alan Bellt, Maria Hempelt, Hans Henschel, Olena Karachebant, Wolfgang Lange, Wolfgang Lohmannt, Olga Novgorodova, Marek Penno, Roberval Walsh, Anne Dabrowski, Moritz Guthoff, Rob Loos, Vladimir Ryjov, Piotr Burtowy, Arkady Lokhovitskiy, Nathaniel Odell, Dominik Przyborowski, David Stickland, Agnieszka Zagozdzinska

Research output: Contribution to journalConference articlepeer-review

2 Scopus citations

Abstract

The CMS beam condition monitoring subsystem BCM1F during LHC Run I consisted of 8 individual diamond sensors situated around the beam pipe within the tracker detector volume, for the purpose of fast monitoring of beam background and collision products. Effort is ongoing to develop the use of BCM1F as an online bunch-by-bunch luminosity monitor. BCM1F will be running whenever there is beam in LHC, and its data acquisition is independent from the data acquisition of the CMS detector, hence it delivers luminosity even when CMS is not taking data. To prepare for the expected increase in the LHC luminosity and the change from 50 ns to 25 ns bunch separation, several changes to the system are required, including a higher number of sensors and upgraded electronics. In particular, a new real-time digitizer with large memory was developed and is being integrated into a multi-subsystem framework for luminosity measurement. Current results from Run II preparation will be discussed, including results from the January 2014 test beam.

Original languageEnglish (US)
Article number346
JournalProceedings of Science
Volume0
StatePublished - 2014
Event3rd Technology and Instrumentation in Particle Physics Conference, TIPP 2014 - Amsterdam, Netherlands
Duration: Jun 2 2014Jun 6 2014

All Science Journal Classification (ASJC) codes

  • General

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