CERN Accelerating science

Article
Report number FERMILAB-PUB-22-744-SQMS
Title Characterization and alignment of a resonant cavity beam position monitor for the Compact LInear Collider (CLIC) project at CERN
Author(s) Zorzetti, Silvia (CERN ; Fermilab) ; Wendt, Manfred (CERN) ; Mainaud-Durand, Hélène (CERN)
Publication 2023
Number of pages 12
In: Nucl. Instrum. Methods Phys. Res., A 1048 (2023) 167898
DOI 10.1016/j.nima.2022.167898 (publication)
Subject category Detectors and Experimental Techniques
Accelerator/Facility, Experiment CLIC
Abstract Beam diagnostic devices are essential tools to sense the properties of the beam in particle accelerators. Beam Position Monitors (BPMs) are used to detect the transverse beam spatial coordinates. A large number of high-resolution resonant cavity BPMs, operating at 14GHz, are proposed to monitor the orbit of the two main beam linacs of the CLIC project. This paper discusses innovative calibration techniques on a dedicated test bench in the frame of the PACMAN project. The particular location of the electromagnetic center of the resonant cavity BPM is detected utilizing a stretched-wire measurement approach. Measurements, RF characterization and final fiducialization of the BPM electrical offset are treated with details. Initial studies through EM simulations of the cavity BPM are covered. The presented experimental results prove the feasibility of the alignment methodology with nanometric resolution.
Copyright/License publication: © 2022-2025 US government (License: CC-BY-4.0)

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