The new LUCID-2 detector for luminosity measurement and monitoring in ATLAS

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21670%2F18%3A00330013" target="_blank" >RIV/68407700:21670/18:00330013 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1088/1748-0221/13/07/P07017" target="_blank" >http://dx.doi.org/10.1088/1748-0221/13/07/P07017</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1088/1748-0221/13/07/P07017" target="_blank" >10.1088/1748-0221/13/07/P07017</a>

Result language
angličtina
Original language name
The new LUCID-2 detector for luminosity measurement and monitoring in ATLAS
Original language description
The ATLAS luminosity monitor, LUCID (LUminosity Cherenkov Integrating Detector), had to be upgraded for the second run of the LHC accelerator that started in spring 2015. The increased energy of the proton beams and the higher luminosity required a redesign of LUCID to cope with the more demanding conditions. The novelty of the LUCID-2 detector is that it uses the thin quartz windows of photomultipliers as Cherenkov medium and a small amounts of radioactive Bi-207 sources deposited on to these windows to monitor the gain stability of the photomultipliers. The result is a fast and accurate luminosity determination that can be kept stable during many months of data taking. LUCID-2 can also measure the luminosity accurately online for each of the up to 2808 colliding bunch pairs in the LHC. These bunch pairs are separated by only 25 ns and new electronics has been built that can count not only the number of pulses above threshold but also integrate the pulses.
Czech name
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Czech description
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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
10301 - Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)

Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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