17–22 May 2026
C.I.D
Europe/Zurich timezone

Extrapolated optics measurement from BPM to instrumentation in LHC commissioning

WEP5072
20 May 2026, 16:00
2h
C.I.D

C.I.D

Deauville, France
Poster Presentation MC5.D11: Code Developments and Simulation Techniques Poster session

Speaker

Mattia Stefanelli (European Organization for Nuclear Research, National Institute for Subatomic Physics)

Description

Segment-by-Segment (SbS) analysis is employed in accelerators for the determination of lattice errors and corrections, by identifying deviations between optics functions propagated through a modelled lattice segment and measured values. For the Large Hadron Collider (LHC), this method is routinely used during optics commissioning for the compensation of strong local errors in the experimental insertions and arcs. Beyond the determination of corrections however, the SbS approach is also of interest to propagate optics functions measured at the BPMs, to key instrumentation in other locations in the ring, for example to improve emittance measurements by providing more accurate estimates of the optics functions at relevant devices. The SbS tools used in the LHC have been further developed to support the propagation of measurement to lattice target locations distinct from the BPMs, leading to new possible applications. In this paper the analysis methods and results from recent LHC commissioning are presented.

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Author

Mattia Stefanelli (European Organization for Nuclear Research, National Institute for Subatomic Physics)

Co-authors

Ewen Maclean (European Organization for Nuclear Research) Joschua Dilly (European Organization for Nuclear Research)

Presentation materials

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