Precision Luminosity of LHC Proton-Proton Collisions at 13 TeV Using Hit Counting With TPX Pixel Devices

被引：13

作者：

Sopczak, Andre ^{[1
]}

Ali, Babar ^{[1
]}

Asawatavonvanich, Thanawat ^{[1
]}

Begera, Jakub ^{[1
]}

Bergmann, Benedikt ^{[1
]}

Billoud, Thomas ^{[2
]}

Burian, Petr ^{[1
]}

Caicedo, Ivan ^{[1
]}

Caforio, Davide ^{[1
]}

Heijne, Erik ^{[1
]}

Janecek, Josef ^{[1
]}

Leroy, Claude ^{[2
]}

Manek, Petr ^{[1
]}

Mochizuki, Kazuya ^{[2
]}

Mora, Yesid ^{[1
]}

Pacik, Josef ^{[1
]}

Papadatos, Costa ^{[2
]}

Platkevic, Michal ^{[1
]}

Polansky, Stepan ^{[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 | 2017年 / 64卷 / 03期

基金：

加拿大自然科学与工程研究理事会;

关键词：

Colliding beam accelerators; LHC; luminosity; Timepix;

D O I：

10.1109/TNS.2017.2664664

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 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 analyzed 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 10-s time intervals. The internal long-term time stability of the measurements was below 0.5% for the data-taking period.

引用

页码：915 / 924

页数：10

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