Münster 2017 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 34: Instrumentation VIII and Accelerators
HK 34.4: Vortrag
Mittwoch, 29. März 2017, 17:45–18:00, F 073
Precsion beam energy measurement by undulator radiation at MAMI — •Pascal Klag, Patrick Achenbach, Philipp Herrmann, Werner Lauth, and Josef Pochodzalla — Institut für Kernphysik, Johannes Gutenberg-Universität Mainz
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. Over time, the energy drifts, less than 1keV. On the other hand, presently the absolute energy can be determined with an systematic uncertainty of 160keV. In 2016 a complementary method which does not rely on magnetic field measurement is tested. The method is based on interferometry with two spatial separated light sources (Undulators) driven by relativistic electrons. A high resolving Monochromator is used to analyse the spectrum of the light. Noise in the camera has limited the error of the pilot measurement to 10−3. In the future, systematic effects have to be understood and it is planned to use a cooled camera to reduce uncertainties to Δ E/E<10−4.