@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.}
}
@conference {Frassetto2014,
	title = {Spectrometer for single-shot X-ray emission and photon diagnostics},
	booktitle = {X-Ray Free-Electron Lasers: Beam Diagnostics, Beamline Instrumentation, and Applications II},
	volume = {9210},
	year = {2014},
	pages = {92100E},
	publisher = {SPIE, The International Society for Optical Engineering},
	organization = {SPIE, The International Society for Optical Engineering},
	address = {Bellingham, WA},
	abstract = {We present the design and characterization of a compact and portable spectrometer realized for photon in-photon out experiments (in particular X-Ray Emission Spectroscopy, XES), in particular tailored to be used at the FERMI free-electron-laser (FEL) at ELETTRA (Italy). The spectrometer can be installed on different end stations at variable distances from the target area both at synchrotron and FEL beamlines. Different input sections can be accommodated in order to fit the experimental requests, with/without an entrance slit and with/without an additional relay mirror. The design is compact in order to realize a portable instrument within a total footprint of less than one square meter. The instrument is based on the use of two flat-field grazing-incidence gratings and an EUV-enhanced CCD detector to cover the 25-800 eV spectral range, with spectral resolution better than 0.2%. The absolute response of the spectrometer, has been measured in the whole spectral region of operation, allowing calibrated measurements of the photon flux. The characterization on the Gas Phase beamline at ELETTRA Synchrotron as instrument for XES and some experimental data of the FEL emission taken at EIS-TIMEX beamline at FERMI, where the instrument has been used for photon beam diagnostics, are presented.},
	keywords = {CCD, EUV, FEL, gratings, spectrometer, SPECTROSCOPY, x-ray},
	issn = {0277-786X},
	doi = {10.1117/12.2061765},
	author = {Frassetto, F. and Miotti, P. and Callegari, C. and de Simone, M. and Finetti, P. and Giangrisostomi, E. and Grazioli, C. and Iesari, F. and Kivimaeki, A. and Mincigrucci, R. and Principi, E. and Stagira, S. and Di Cicco, A. and Coreno, M. and Poletto, L.}
}
