Würzburg 2018 – scientific programme

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AKBP: Arbeitskreis Beschleunigerphysik

AKBP 6: Synchrotron Radiation Sources (SR and FEL)

AKBP 6.7: Talk

Tuesday, March 20, 2018, 18:00–18:15, NW-Bau - HS5

Chicane Design Optimization for Echo-Enabled Harmonic Generation at sFLASH — •Hauke Biss¹, Jörn Bödewadt², Vanessa Grattoni², Christoph Lechner², Tim Plath³, and Wolfgang Hillert¹ — ¹University of Hamburg, Hamburg, Germany — ²DESY, Hamburg, Germany — ³TU Dortmund University, Dortmund, Germany

The sFLASH experiment at the free-electron laser (FEL) FLASH at DESY in Hamburg is investigating phase-space manipulating seeding techniques. A scheme under investigation is the echo-enabled harmonic generation (EEHG). In this seeding scheme two laser pulses interact with the electron beam in two separate short undulators, each followed by a dispersive section. The resulting micro-bunched current profile has rich harmonic content, enabling the generation of seeded FEL radiation at high harmonics in a variable-gap undulator system further downstream. As, currently, the achievable harmonics of the sFLASH setup are limited by the dispersion strength of the magnetic chicanes, an upgrade is planned. In this contribution we discuss the parameter optimization aiming at sub-10nm seeded FEL radiation and present design considerations for integrating new magnetic chicanes under the boundary conditions given by the already existing hardware.

This work is supported by the Federal Ministry of Education and Research of Germany within FSP-302 under FKZ 05K13GU4, 05K13PE3, and 05K16PEA.