The LUCID-2 Luminometer | Zendy

V. Hedberg | Zendy

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The LUCID-2 Luminometer

Author(s) -

V. Hedberg

Publication year - 2018

Publication title -

international journal of modern physics conference series

Language(s) - English

Resource type - Journals

ISSN - 2010-1945

DOI - 10.1142/s2010194518600765

Subject(s) - photomultiplier , cherenkov radiation , detector , luminosity , physics , calibration , cherenkov detector , large hadron collider , quartz , window (computing) , optics , nuclear physics , computer science , materials science , astrophysics , quantum mechanics , galaxy , composite material , operating system

The LUCID-2 detector is the main online and oine luminosity monitor of the ATLASexperiment. It provides 104 dierent luminosity measurements from different algorithms for each of the thousands of LHC bunches. The new detector is using the quartz windows of 10 mm diameter photomultipliers and optical quartz bers as the Cherenkov medium. A main challenge for a luminometer is to keep the eciency constant during years of data-taking. LUCID-2 is using an innovative calibration system based on radioactive Bi-207 sources deposited on the quartz window of the readout photomultipliers.

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