Würzburg 2018 – scientific programme
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T: Fachverband Teilchenphysik
T 81: Pixel-Detektoren III
T 81.6: Talk
Thursday, March 22, 2018, 17:45–18:00, Z6 - HS 0.002
Determination of Luminosity with Thermal Neutron Counting using TPX Detectors in the ATLAS Cavern in LHC Proton-Proton Collisions at 13 TeV — •Andre Sopczak1, Babar Ali1, Jakub Begera1, Benedikt Bergmann1, Thomas Billoud2, Bartolomej Biskup1, Petr Burian1, Davide Caforio1, Erik Heijne1, Josef Janecek1, Claude Leroy2, Petr Manek1, Yesid Mora1, Stanislav Pospisil1, Thomas Seidler1, Michal Suk1, and Zdenek Svoboda1 — 1IEAP CTU in Prague — 2Group of Particle Physics, University of Montreal
A network of Timepix (TPX) devices installed in the ATLAS cavern has the unique capability of measuring the luminosity with thermal neutron counting in LHC proton-proton collisions at 13 TeV. Compared to the hit-counting method, the method of thermal neutron counting has the advantage that it is not affected by induced radioactivity. The results of the luminosity determination are presented for several independently-operated TPX detectors. The long-term time-stability measurements of the luminosity are presented for individual devices and between different devices. The high-statistics data-sets allow a detailed comparison between neutron counting and hit-counting luminosity determinations.