ATLAS Forward Proton Time-of-Flight Detector: LHC Run2 performance and experiences
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F20%3A10422065" target="_blank" >RIV/00216208:11320/20:10422065 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=BgbuAmBvtU" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=BgbuAmBvtU</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1088/1748-0221/15/10/C10004" target="_blank" >10.1088/1748-0221/15/10/C10004</a>
Alternative languages
Result language
angličtina
Original language name
ATLAS Forward Proton Time-of-Flight Detector: LHC Run2 performance and experiences
Original language description
The performance of the ATLAS Forward Proton Time-of-Flight (ToF) Cherenkov detector is studied using the ATLAS data collected in 2017 during the LHC Run2. The detailed analysis of the results, including detector efficiency and time resolution of the ToF detector, is discussed. The detector construction and its expected performance based on beam test results are briefly summarized first. Operational experiences are presented. They include problems due to attempts to operate Micro-Channel Plate Photomultiplier Tubes (MCP-PMTS) in the vacuum, leading to changes in the detector construction. In addition, a new MCP-PMT design was needed, as a result of the observed gain drop for high rates and its non-recoverability. Also, other hardware changes are presented - the effect of the replacement of glued crystal bars by monolithic ones, as well as the change of the MCP-PMT back-end electronics, based on simulation to reduce signal crosstalk resulting in further detector time resolution improvement. The second part of the document is devoted to the achieved time resolutions, 20 +/- 4 ps and 26 +/- 5 ps, of two installed ToF detectors. Despite their very low efficiencies (below 10%) in major parts of the analyzed data, this represents a superb time resolution for detectors operating a few millimeters from the LHC beams. Based on the time resolution, this result characterizes the best ToF detector among those operated by the different LHC experiments in the forward regions during the LHC Run2. Finally, the possibility of reconstructing the z-coordinate of the ATLAS interaction region using the ToF detectors is shown.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10303 - Particles and field physics
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Instrumentation [online]
ISSN
1748-0221
e-ISSN
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Volume of the periodical
15
Issue of the periodical within the volume
10
Country of publishing house
GB - UNITED KINGDOM
Number of pages
17
Pages from-to
C10004
UT code for WoS article
000577277600004
EID of the result in the Scopus database
2-s2.0-85092661233