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T: Fachverband Teilchenphysik

T 81: Pixel-Detektoren III

T 81.6: Vortrag

Donnerstag, 22. März 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.