Precision Luminosity of LHC Proton-Proton Collisions at 13 TeVUsing Hit-Counting with TPX Pixel Devices
- NázevTitle
- Precision Luminosity of LHC Proton-Proton Collisions at 13 TeVUsing Hit-Counting with TPX Pixel DevicesPrecision Luminosity of LHC Proton-Proton Collisions at 13 TeVUsing Hit-Counting with TPX Pixel Devices
- Druh výsledkuResult type
- Příspěvek ve sborníkuProceedings paper
- AutořiAuthors
- A. Sopczak, B. Ali, T. Asawatavonvanich, J. Begera, B. Bergmann, P. Burian, I. Caicedo Sierra, D. Caforio, H. Heijne, J. Janeček, P. Mánek, Y. Mora Sierra, J. Pacík, M. Platkevič, Š. Polanský, S. Pospíšil, M. Suk, Z. Svoboda
- Klíčová slovaKeywords
- luminosity, pixel detector
- KonferenceConference
- 2016 IEEE Nuclear Science Symposium and Medical Imaging Conference (Strasbourg, France, 2016-10-29)
- DOIDOI
- 10.1109/TNS.2017.2664664
- Časopis / citaceJournal / citation
- IEEE Transactions on Nuclear Science 64(3), 915-924 (2017) · ISSN 0018-9499
- RokYear
- 2017
- JazykLanguage
- eng
- ZáznamyRecords
- ProjektProject
- Institucionální podpora na rozvoj výzkumné org.Institucionální podpora na rozvoj výzkumné org.
- CitovánoCited by
- 16 (INSPIRE-HEP)
- Citace ke staženíDownload citation
- TXT · BibTeX
AbstraktAbstract
A network of Timepix (TPX) devices installed in the ATLAS cavern measures the LHC luminosity as a function of time as a stand-alone system. The data were recorded from 13 TeV proton-proton collisions in 2015. Using two TPX devices, the number of hits created by particles passing the pixel matrices was counted. A van der Meer scan of the LHC beams was analysed using bunch-integrated luminosity averages over the different bunch profiles for an approximate absolute luminosity normalization. It is demonstrated that the TPX network has the capability to measure the reduction of LHC luminosity with precision. Comparative studies were performed among four sensors (two sensors in each TPX device) and the relative short-term precision of the luminosity measurement was determined to be 0.1% for 10s time intervals. The internal long-term time stability of the measurements was below 0.5% for the data-taking period.
A network of Timepix (TPX) devices installed in the ATLAS cavern measures the LHC luminosity as a function of time as a stand-alone system. The data were recorded from 13 TeV proton-proton collisions in 2015. Using two TPX devices, the number of hits created by particles passing the pixel matrices was counted. A van der Meer scan of the LHC beams was analysed using bunch-integrated luminosity averages over the different bunch profiles for an approximate absolute luminosity normalization. It is demonstrated that the TPX network has the capability to measure the reduction of LHC luminosity with precision. Comparative studies were performed among four sensors (two sensors in each TPX device) and the relative short-term precision of the luminosity measurement was determined to be 0.1% for 10s time intervals. The internal long-term time stability of the measurements was below 0.5% for the data-taking period.