Novel optical interferometry of synchrotron radiation for absolute electron beam energy measurements

P. Klag, P. Achenbach, M. Biroth, T. Gogami, P. Herrmann, M. Kaneta, Y. Konishi, W. Lauth, S. Nagao, S. N. Nakamura, J. Pochodzalla, J. Roser, Y. Toyama

研究成果: Article査読


A novel interferometric method is presented for the measurement of the absolute energy of electron beams. In the year 2016, a pioneering experiment was performed using a 195 MeV beam of the Mainz Microtron (MAMI). The experimental setup consisted of two collinear magnetic undulators as sources of coherent optical synchrotron light and a high-resolving grating monochromator. Beam energy measurements required the variation of the relative undulator distance in the decimeter range and the analysis of the intensity oscillation length in the interference spectrum. A statistical precision of 1 keV was achieved in 1 h of data taking, while systematic uncertainties of 700 keV were present in the experiment. These developments aim for a relative precision of 10−5 in the absolute momentum calibrations of spectrometers and high-precision hypernuclear experiments. Other electron accelerators with beam energies in this regime such as the Mainz Energy Recovering Superconducting Accelerator (MESA) might benefit from this new method.

ジャーナルNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
出版ステータスPublished - 2018 12 1

ASJC Scopus subject areas

  • 核物理学および高エネルギー物理学
  • 器械工学


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