IBIC2026 - 15th International Beam Instrumentation Conference

Sensitivity of button- and stripline beam position monitors to crabbing angle and trajectory tilt angle

WEP011

2 Sept 2026, 16:00

2h

Ballroom C (Whistler Conference Centre)

Poster Presentation MC03: Beam Position Monitors Wednesday Poster Session 3

Speaker

Daniel Sittard (European Organization for Nuclear Research, Karlsruhe Institute of Technology)

Description

Crab crossing is used in the High-Luminosity LHC (HL-LHC) to increase luminosity. Button- and stripline beam position monitors (BPMs) are used to observe the beam crabbing and to use the signal for RF noise feedback. The BPMs are not only sensitive to the crabbing angle, but also the trajectory tilt and center-of-mass position. Untangling the individual contributions demands attention and potentially limits the crabbing angle measurement. The output signals of button- and stripline BPMs due to the crabbing angle and trajectory tilt angle are individually investigated with electromagnetic particle-in-cell simulations and compared to analytical approximations. The limits on the crabbing signal measurement in the presence of a trajectory tilt angle are discussed.