CERN Accelerating science

Article
Title	Simulations, Diagnostics and Recent Results of the VISA II Experiment
Author(s)	Andonian, G ; Murokh, A Y ; Pellegrini, C ; Reiche, S ; Rosenzweig, J B ; Travish, G
Affiliation	(UCLA, Los Angeles, California BNL, Upton, Long Island, New York INFN-Milano, Milano INFN/LNF, Frascati (Roma) POSTECH, Pohang, Kyungbuk)
Publication	2005
In:	27th International Conference on Free Electron Lasers, Palo Alto, CA, USA, 21 - 26 Aug 2005, pp.83
Subject category	Accelerators and Storage Rings
Abstract	The VISA II experiment entails use of a chirped beam to drive a high gain SASE FEL. The output radiation is diagnosed with a modified frequency resolved optical gating (FROG) technique. Sextupoles are implemented to correct the lonigtudinal aberrations affecting the high energy spread chirped beam during transport to the undulator. The double differential energy spectrum is measured with a pair of slits and a set of gratings. In this paper, we report on start-to-end simulations, radiation diagnostics, as well as intial experimental results; experimental methods are described.