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Further Studies of Undulator Tapering in X-Ray FELs

In English

Författare

Summary, in English

We further the studies of the model-based optimization of tapered free-electron lasers presented in a recent publication [Phys. Rev. ST Accel. Beams 18, 040702 (2015)]. Departing from the ideal case, wherein the taper profile is a smooth and continuous function, we consider the more realistic case, with individual undulator segments separated by break sections. Using the simulation code GENESIS, we apply our taper optimization method to a case, which closely resembles the FLASH2 facility in Hamburg, Germany. By comparing steady-state and time-dependent simulations, we examine how time-dependent effects alter the optimal taper scenario. From the simulation results, we also deduce that the "traditional" empirical method, whereby the intermediate radiation power is maximized after closing every undulator gap, does not necessarily produce the highest final power at the exit of the undulator line.

Publiceringsår

2015-12

Språk

Engelska

Sidor

321-321

Publikation/Tidskrift/Serie

Proceedings of FEL 2015, Daejeon, Korea

Dokumenttyp

Konferensbidrag

Ämne

  • Accelerator Physics and Instrumentation

Nyckelord

  • undulator, simulation, electron, radiation, laser

Status

Published

ISBN/ISSN/Övrigt

  • ISBN: 978-3-95450-134-2