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BE: Beschleunigerphysik

BE 7: Synchrotron Radiation I

BE 7.4: Vortrag

Mittwoch, 2. April 2014, 10:30–10:45, MOL 213

A Robinson Wiggler Proposal for the Metrology Light Source — •Tobias Goetsch, Jörg Feikes, Markus Ries, and Godehard Wüstefeld — Helmholtz-Zentrum Berlin

The Metrology Light Source (MLS) of the Physikalisch-Technische Bundesanstalt, situated in Berlin (Germany) is an electron storage ring operating from 105 MeV to 630 MeV. The MLS serves as the national primary source standard from the near infrared to the extreme ultraviolet spectral region [1]. Due to the low operating energy of 630 MeV, Touschek scattering dominates the lifetime at the MLS. By installing a Robinson Wiggler, damping effects can be transferred from the longitudinal to the horizontal plane [2,3], thereby increasing the energy spread while reducing the horizontal emittance. By varying the energy spread, the bunch length can be increased and thus the scattering rate decreased, resulting in an increased lifetime. According to preliminary estimations an increase in lifetime of more than 60 % seems achievable. First results of a feasibility study of such a scheme will be presented.

[1] R. Klein et al., Phys. Rev. ST-AB 11, 110701, 2008

[2] K. W. Robinson, Radiation effects in circular electron accelerators, physical review, vol. 111, number 2, 1958.

[3] H. Abualrob et al., SOLEIL Emittance Reduction using a Robinson Wiggler, MOPPP062 in Proceedings of IPAC2012, New Orleans (USA), 2012