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Proceedings Paper

A fixed included angle monochromator for the 4th generation light source at FERMI@Elettra
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Paper Abstract

FERMI@Elettra is a Free Electron Laser (FEL) user facility currently under construction at Sincrotrone Trieste, Italy. It will provide a spatial coherent transform-limited beam in the sub-ps regime, covering the wavelength range from 100 nm to 3 nm with the goal of 1 nm (by using third harmonics). The transform-limited beam is supposed to have a natural energy bandwidth of the order of 50-100 meV. Nevertheless, one of the three future beamlines, the one dedicated to Low Density Matter (LDM) studies, needs a monochromator to clean the signal. It must cover the whole wavelength range with eventual omission of the lower energy part. We will report the design of a fixed included angle monochromator employing three gratings. The optical system will be described, and particular attention will be given to the constraints like the pulse broadening, the focus displacement and, of course, the flux. Engineering constraints and manufacturers tolerances also taken into account will be presented, too.

Paper Details

Date Published: 8 September 2009
PDF: 11 pages
Proc. SPIE 7448, Advances in X-Ray/EUV Optics and Components IV, 74480O (8 September 2009); doi: 10.1117/12.824445
Show Author Affiliations
Cristian Svetina, Sincrotrone Trieste S.C.p.A. (Italy)
Marco Zangrando, Lab. TASC INFM-CNR (Italy)
Anna Bianco, Sincrotrone Trieste S.C.p.A. (Italy)
Daniele Cocco, Sincrotrone Trieste S.C.p.A. (Italy)

Published in SPIE Proceedings Vol. 7448:
Advances in X-Ray/EUV Optics and Components IV
Ali M. Khounsary; Christian Morawe; Shunji Goto, Editor(s)

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