Würzburg 2018 – wissenschaftliches Programm
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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 σbeam<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.