Dresden 2026 – scientific programme

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AKBP: Arbeitskreis Beschleunigerphysik

AKBP 3: Diagnostics

AKBP 3.2: Talk

Monday, March 9, 2026, 15:15–15:30, SCH/A117

Compact Beam Position Monitor using a Segmented Toroidal Coil — •Lars Festring — RWTH Aachen University, Germany

A compact beam position monitor based on a segmented toroidal coil surrounding a charged particle beam has been investigated (F. Abusaif et al., Rev. Sci. Instrum. 1 March 2025; 96 (3): 033302, https://doi.org/10.1063/5.0240076).

It uses the induced voltages in the windings. We theoretically investigate the response of the coils to a bunched particle beam based on a lumped-element model and a Gaussian beam model. Then, we compare the model to measurements taken in the laboratory and the storage ring COSY. In addition, we devise a way to measure the covariance of the transversal beam profile and test it via a simulation. The resonant behavior in the coils’ frequency response may be exploited to further increase the sensitivity of the device.

The resolution of the position measurement presently achieved is about 5  µ m in a 1  s time interval for a beam current of 0.5  mA.

Keywords: Rogowski coils; Beam position monitors; Particle beams; Storage rings; Particle accelerators