Record Details

Title:
Purified SASE undulator configuration to enhance the performance of the soft x-ray beamline at the European XFEL
Affiliation(s):
EuXFEL staff
Author group:
Simulation of Photon Fields
Topic:
Abstract:
The purified SASE (pSASE) undulator configuration recently proposed at SLAC promises an increase in the output spectral density of XFELs. In this article we study a straightforward implementation of this configuration for the soft x-ray beamline at the European XFEL. A few undulator cells, resonant at a subharmonic of the FEL radiation, are used in the middle of the exponential regime to amplify the radiation, while simultaneously reducing the FEL bandwidth. Based on start-to-end simulations, we show that with the proposed configuration the spectral density in the photon energy range between 1.3 keV and 3 keV can be enhanced of an order of magnitude compared to the baseline mode of operation. This option can be implemented into the tunable-gap SASE3 baseline undulator without additional hardware, and it is complementary to the self-seeding option with grating monochromator proposed for the same undulator line, which can cover the photon energy range between about 0.26 keV and 1 keV.
Imprint:
2013
Related external records:
Report number:
DESY-13-135; arXiv:1308.0172
Report type:
External Reports
Language(s):
English


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 Record created 2016-10-11, last modified 2019-01-30

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