Abstract
RHU modules, described in Sect. 4.5.2, are used for online BCM1F rate measurements. Although it is expected that each channel measures almost the same hit rate, in practice the rates differ significantly. This is due to conditions like larger noise in a few channels requiring a higher discriminator threshold, differences in the sensor efficiency due to progressive radiation damage or a reduced bias voltage. In the future these inefficiencies will be corrected for, but at the moment they are accounted for by normalizing the rates to an average of all channels.
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Private communication with Jessica Leonard
CMS Online Software project page, Internal CERN Documentation URL https://svnweb.cern.ch/trac/cmsos and https://edms.cern.ch/ui/#!master/navigator/document?D:1832636191:1832636191:subDocs
J. Leonard et al. Fast beam condition monitor for CMS: performance and upgrade, Proceedings from HSTD-9-13 conference - Hiroshima, Japan (2013)
VdM scan analysis framework designed by Monika Grothe for CMS. Internal CERN Documentation URL https://twiki.cern.ch/twiki/bin/viewauth/CMS/VdMLumiFramework
Python, URL https://docs.python.org/2/tutorial/index.html#tutorial-index
ROOT, URL https://root.cern.ch/
CMS Collaboration, Luminosity Calibration for the 2013 Proton-Lead and Proton-Proton Data Taking, CMS-PAS-LUM-13-002 (2013). URL https://cds.cern.ch/record/1643269
G. Anders, et al., LHC Bunch Current Normalisation for the April-May 2010 Luminosity Calibration Measurements, CERN-ATS-Note-2011-004 PERF, (BCNWG note1) (2011). URL http://cdsweb.cern.ch/record/1325370
C. Barschel, et al. Results of the LHC DCCT Calibration Studies, CERN-ATS-Note-2012-026 PERF (2012). URL http://cds.cern.ch/record/1425904
C. Barschel, DCCT uncertainties for VDM fills in Aug 2015, slides from LHC LCMWG meeting Sept. 28, 2015. URL https://indico.cern.ch/event/447902/contribution/0
G. Papotti, et al. Longitudinal Beam Measurements at the LHC: The LHC Beam Quality Monitor,CERN-ATS-Note-2011-220 (2011). URL http://cds.cern.ch/record/1399087
C. Barschel, Ghost Charges for VDM fills Aug 2015, slides from LHC LCMWG meeting Oct. 19, 2015. URL https://indico.cern.ch/event/454827/contribution/0
M. Palm, BSRL: VdM-scan August 2015, slides from LHC LCMWG meeting Sept. 28, 2015. URL https://indico.cern.ch/event/447902/contribution/2
J.L. Gonzalez, et al. The Measurement of Bunch Intensity using the LHC BPM System,CERN-BE-2009-017 (2009). URL http://cds.cern.ch/record/1183398
CMS Collaboration, CMS Luminosity Based on Pixel Cluster Counting - Summer 2012 Update, CMS Physics Analysis Summary LUM-12-001 (2012)
M. Klute, C. Medlock and J. Salfeld-Nebgen, Beam Imaging and Luminosity Calibration (2016), arXiv:1603.03566
CMS Collaboration, CMS luminosity measurement for the 2015 data taking period. CMS Phys. Anal. Summ LUM-15-001 (2015)
W. Kozanecki, T. Pieloni, J. Wenninger, Observation of Beam-beam Deflections with LHC Orbit Data, CERN-ACC-NOTE-2013-0006 (2013). URL http://cds.cern.ch/record/1581723
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Karacheban, O. (2018). Measurements of the Luminosity Using BCM1F. In: Luminosity Measurement at the Compact Muon Solenoid Experiment of the LHC . Springer Theses. Springer, Cham. https://doi.org/10.1007/978-3-319-93139-5_5
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