Interference-Based Ultrafast Polarization Control at Free Electron Lasers release_ufscsoowinbdflo5ojkju6bx5m

by Svitozar Serkez, Gianluca Geloni, Evgeny Saldin, Kip, Bruce Carlsten, Volker RW Schaa

Published by JACoW, Geneva, Switzerland.

2018   Volume FEL2017, USA

Abstract

We present a scheme to generate two distinct FEL pulses with different polarization properties and down to 50 fs-order temporal separation. The scheme is based on installation of two consecutive helical undulators, a corrugated structure and emittance spoiler on top of a baseline variable gap undulator, and is exemplified on the SASE3 beamline of the European XFEL. Good temporal coherence by either self or external seeding is preferable. Our schemes can be used for pump-probe experiments and in combination with the "twin-bunch" technique.
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Date   2018-02-03
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