Beam-dynamic effects at the CMS BRIL van der Meer scans

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The CMS Beam Radiation Instrumentation and Luminosity Project (BRIL) is responsible for the simulation and measurement of luminosity, beam conditions and radiation fields in the CMS experiment. The project is engaged in operating and developing new detectors (luminometers), adequate for the experimental conditions associated with high values of instantaneous luminosity delivered by the CERN LHC . BRIL operates several detectors based on different physical principles and technologies. Precise and accurate measurements of the delivered luminosity is of paramount importance for the CMS physics program. The absolute calibration of luminosity is achieved by the van der Meer method, which is carried out under specially tailored conditions. This paper presents models used to simulate of beam-dynamic effects arising due to the electromagnetic interaction of colliding bunches. These effects include beam-beam deflection and dynamic-β effect. Both effects are important to luminosity measurements and influence calibration constants at the level of 1-2%. The simulations are carried out based on 2016 CMS van der Meer scan data for proton-proton collisions at a center-of-mass energy of 13 TeV.

Original languageEnglish
Article numberC03028
JournalJournal of Instrumentation
Volume13
Issue number3
DOIs
Publication statusPublished - 15 Mar 2018

Fingerprint

Instrumentation
Luminance
luminosity
Radiation
Calibration
Detector
Protons
Detectors
Barycentre
protons
electromagnetic interactions
detectors
Deflection
Instantaneous
Simulation
radiation distribution
Collision
center of mass
deflection
Physics

Keywords

  • Beam dynamics
  • Simulation methods and programs

ASJC Scopus subject areas

  • Instrumentation
  • Mathematical Physics

Cite this

Beam-dynamic effects at the CMS BRIL van der Meer scans. / Babaev, A.

In: Journal of Instrumentation, Vol. 13, No. 3, C03028, 15.03.2018.

Research output: Contribution to journalArticle

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