SMuK 2023 – scientific programme

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AKBP: Arbeitskreis Beschleunigerphysik

AKBP 18: Beam Dynamics II

AKBP 18.3: Talk

Thursday, March 23, 2023, 18:00–18:15, CHE/0184

Influence of the Complex Filling Patterns on the Results of the Transverse Beam Size Measurements with the Interferometric Technique — •Irma Shmidt, Ji-Gwang Hwang, Gregor Schiwietz, and Andreas Jankowiak — Helmholtz-Zentrum Berlin

The transverse size of the electron beam in a storage ring can be measured using the synchrotron radiation of a bending magnet. Due to the diffraction limit, many facilities exploit beam size monitors in the X-ray regime. On the other hand, the visible part of the emitted radiation delivers spatial information via an interference pattern after passing through a double slit. Assuming a Gaussian beam distribution the size of the beam can be easily obtained with an analytical formula. If this assumption is not fulfilled, the calculated beam shape will vary from the real distribution. This can appear for instance in case of exotic beam optics settings or complicated filling patterns, that are widely used in modern storage-ring-based light sources. Influence of the additional electron distribution with larger emittance on the measurement of the transverse size of the multi-bunch train with the usual interferometric method will be discussed in this presentation.