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AKBP: Arbeitskreis Beschleunigerphysik

AKBP 4: Diagnostics, Control and Instrumentation

AKBP 4.8: Vortrag

Dienstag, 20. März 2018, 18:15–18:30, NW-Bau - HS4

Systematic effects in the beam energy measurements by undulator radiation at MAMI — •Pascal Klag¹, Patrick Achenbach¹, Toshiyuki Gogami², Philipp Herrmann¹, Masashi Kaneta², Yoshihiro Konishi², Werner Lauth¹, Sho Nagao², Satoshi Nakamura², Josef Pochodzalla¹, Yuichi Toyama², and Shoko Tomita² — ¹Johannes Gutenberg-Universität Mainz — ²Tohoku University Sendai

The Mainz microtron is an electron accelerator, which delivers electron energies up to 1.6 GeV, with a small spread of the energy σ_beam<13keV. The uncertainty for the absolute energy for all available beam energies was limited to 160 keV. A novel method is used to improve the uncertainty for the energy of a 195 MeV beam. The method is based on interferometry with two spatially separated light sources (undulators) driven by relativistic electrons. A high resolving monochromator was used to analyse the spectrum of the light. In 2016 a preliminary pilot beamtime proved the principle, but it could also be shown that systematic effects have to be considered. These effects had to be understood and minimized. Recent developments are dedicated to these systematics. In the talk the results and reached accuracy goal will be presented.