Precision Measurements of Induced Radioactivity and Absolute Luminosity Determination With TPX Detectors in LHC Proton-Proton Collisions at 13 TeV

被引：4

作者：

Sopczak, Andre ^{[1
]}

Ali, Babar ^{[1
]}

Begera, Jakub ^{[1
]}

Bergmann, Benedikt ^{[1
]}

Billoud, Thomas ^{[2
]}

Biskup, Bartolomej ^{[1
]}

Burian, Petr ^{[1
]}

Caforio, Davide ^{[1
]}

Heijne, Erik ^{[1
]}

Janecek, Josef ^{[1
]}

Leroy, Claude ^{[2
]}

Manek, Petr ^{[1
]}

Mora, Yesid ^{[1
]}

Pospisil, Stanislav ^{[1
]}

Suk, Michal ^{[1
]}

Svoboda, Zdenek ^{[1
]}

机构：

[1] Czech Tech Univ, Inst Expt & Appl Phys, CZ-12800 Prague, Czech Republic

[2] Univ Montreal, Grp Particle Phys, Montreal, PQ H3T 1J4T, Canada

来源：

IEEE TRANSACTIONS ON NUCLEAR SCIENCE | 2018年 / 65卷 / 07期

基金：

加拿大自然科学与工程研究理事会;

关键词：

Active pixel sensors; colliding beam accelerators; Large Hadron Collider (LHC); luminosity; radiation monitoring;

D O I：

10.1109/TNS.2018.2839664

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A network of Timepix (TPX) devices installed in the ATLAS cavern measures the Large Hadron Collider (LHC) luminosity as a stand-alone system. The data were recorded from 13-TeV proton-proton collisions in 2016. Using two TPX devices, the number of hits created by particles passing the pixel matrices was counted. Absolute luminosity is determined with the van der Meer scan technique by separating the LHC proton beams and measuring the widths of the beams in low-intensity LHC proton-proton collisions. The exact determination of the activation background contributes to the overall precision of the TPX luminosity measurements. The activation background varies in time due to induced radioactivity at the different positions of the TPX devices in the ATLAS cavern. The activation at a given time depends on the history of the LHC operation. A detailed study of induced radioactivity has been performed to reduce the uncertainty on both the relative and absolute luminosity measurements.

引用

页码：1371 / 1377

页数：7

共 15 条

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