@article {M.2014,
	title = {Determining the polarization state of an extreme ultraviolet free-electron laser beam using atomic circular dichroism},
	journal = {Nature communications},
	volume = {5},
	year = {2014},
	pages = {4648},
	publisher = {Nature Publishing Group.},
	address = {London},
	abstract = {Ultrafast extreme ultraviolet and X-ray free-electron lasers are set to revolutionize many domains such as bio-photonics and materials science, in a manner similar to optical lasers over the past two decades. Although their number will grow steadily over the coming decade, their complete characterization remains an elusive goal. This represents a significant barrier to their wider adoption and hence to the full realization of their potential in modern photon sciences. Although a great deal of progress has been made on temporal characterization and wavefront measurements at ultrahigh extreme ultraviolet and X-ray intensities, only few, if any progress on accurately measuring other key parameters such as the state of polarization has emerged. Here we show that by combining ultra-short extreme ultraviolet free electron laser pulses from FERMI with near-infrared laser pulses, we can accurately measure the polarization state of a free electron laser beam in an elegant, non-invasive and straightforward manner using circular dichroism. Â© 2014 Macmillan Publishers Limited.},
	keywords = {electron, FEL, FERMI, laser, polarization},
	issn = {2041-1723},
	doi = {10.1038/ncomms4648},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-84898774550&partnerID=q2rCbXpz},
	author = {Mazza, T. and Ilchen, M. and Rafipoor, A. J. and Callegari, C. and Finetti, P. and Plekan, O. and Prince, K. C. and Richter, R. and Danailov, M. B. and Demidovich, A. and De Ninno, G. and Grazioli, C. and Ivanov, R. and Mahne, N. and Raimondi, L. and Svetina, C. and Avaldi, L. and Bolognesi, P. and Coreno, M. and O'Keeffe, P. and Di Fraia, M. and Devetta, M. and Ovcharenko, Y. and Möller, Th. and Lyamayev, V. and Stienkemeier, F. and Düsterer, S. and Ueda, K. and Costello, J. T. and Kazansky, A. K. and Kabachnik, N. M. and Meyer, M.}
}
