Prof. Cristian Svetina Profile

Prof. Cristian Svetina

at Madrid Institute for Advanced Studies

SPIE Involvement:

Author

Publications (22)

Proceedings Article | 8 July 2021 Open Access

Open Access

Paper

An approach for realizing four-wave-mixing experiments stimulated by two-color extreme ultraviolet pulses

F. Bencivenga, R. Mincigrucci, F. Capotondi, A. Calvi, R. Cucini, L. Foglia, E. Pedersoli, E. Principi, A. Simoncig, P. Cinquegrana, M. Danailov, G. De Ninno, S. Di Mitri, G. Gaio, A. Gessini, L. Giannessi, N. Mahne, M. Manfredda, I. Nikolov, G. Penco, L. Raimondi, P. Ribič, C. Svetina, M. Trovò, M. Zangrando, C. Masciovecchio

Proceedings Volume 11886, 118860E (2021) https://doi.org/10.1117/12.2593345

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Proceedings Article | 18 September 2018 Presentation + Paper

Presentation + Paper

Inspecting adaptive optics with at-wavelength wavefront metrology

J. Krempaský, F. Koch, P. Vagovič, L. Mikeš, A. Jaggi, C. Svetina, U. Flechsig, L. Patthey, S. Marathe, D. Batey, S. Cipiccia, C. Rau, F. Seiboth, M. Seaberg, C. David, U. Wagner

Proceedings Volume 10761, 107610D (2018) https://doi.org/10.1117/12.2320532

KEYWORDS: Mirrors, X-rays, Adaptive optics, X-ray optics, Wavefront distortions, Wavefront analysis, Lenses, Wavefront metrology, Light sources, Wavefront aberrations

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Proceedings Article | 2 November 2016 Presentation

Presentation

Wavefront sensor based diagnostic of FERMI FEL photon beam (Conference Presentation)

Lorenzo Raimondi, Nicola Mahne, Michele Manfredda, Cristian Svetina, Daniele Cocco, Flavio Capotondi, Emanuele Pedersoli, Maya Kiskinova, Marco Zangrando

Proceedings Volume 9965, 99650F (2016) https://doi.org/10.1117/12.2239212

KEYWORDS: Free electron lasers, Wavefront sensors, Diagnostics, Wavefronts, Mirrors, Imaging systems, Sensors, Wave propagation, Diffraction, X-ray optics

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FERMI is the first seeded EUV-SXR free electron laser (FEL) user facility, and it is operated at Elettra Sincrotrone Trieste. Two of the four already operating beamlines, namely LDM (Low Density Matter) and DiProI (Diffraction and Projection Imaging), use a Kirkpatrick-Baez (K-B) active X-ray optics system for focusing the FEL pulses onto the target under investigation. A wafefront sensor is used as diagnostic for the characterization of the focused spot and for the optimization of the parameters of these active optical systems as well. The aim of this work is, first, to describe in detail the optimization procedure using the wavefront sensor through the minimization of the Zernike coefficients, and second, report on the final results obtained on the K-B optical system at the DiProI endstation. The wavefront sensor, mounted out of focus behind the DiProI chamber, allows to compute the intensity distribution of the FEL beam, typically a mix between several modes resulting in a ”noisy hyper-Gaussian” intensity profile, and the wavefront residual from ideal propagation shape and after tilt correction. Combining these two measures we can obtain the electric field of the wave out of focus. Propagating back the electric field we reconstruct the focal spot in far field approximation. In this way the sensor works as a diagnostic reconstructing the focal spot. On the other hand, after modelling the electric field with a Zernike polynomial it is easy and fast to optimize the mirror bending and the optical system angles by minimizing the aberrations, quantified in terms of Zernike coefficients. Since each coefficient corresponds to a single parameter, they can be minimized one at the time. Online wavefront measurements have made possible the optimization of the bending acting on the mirror curvature, and of the (pitch and roll) angle positions of the K-B system. From the wavefront measurements we have inferred a focal spot for DiProI of 5.5 μm x 6.2 μm at 32 nm wavelength, confirmed by the PMMA ablation imprints. The experimental results were compared with the predictions from simulations obtained using the WISE code, starting from the characterization of the actual mirror surface metrology. The results from simulations were found to be in agreement with the experimental measurements.

Proceedings Article | 2 November 2016 Presentation

Presentation

The EIS-TIMER beamline: transient grating spectroscopy at FERMI (Conference Presentation)

Cristian Svetina

Proceedings Volume 9963, 996302 (2016) https://doi.org/10.1117/12.2237396

KEYWORDS: Spectroscopy, Free electron lasers, X-rays, Photons, X-ray optics, Mirrors, Diffraction gratings, Alternate lighting of surfaces, Current controlled current source

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Proceedings Article | 12 May 2015 Paper

Paper

FEL-based transient grating spectroscopy

F. Bencivenga, R. Cucini, F. Capotondi, A. Battistoni, R. Mincigrucci, E. Giangrisostomi, A. Gessini, M. Manfredda, I. Nikolov, E. Pedersoli, E. Principi, C. Svetina, P. Parisse, F. Casolari, M. Danailov, M. Kiskinova, C. Masciovecchio

Proceedings Volume 9512, 951212 (2015) https://doi.org/10.1117/12.2186121

KEYWORDS: Free electron lasers, Mirrors, Nonlinear optics, Extreme ultraviolet, Charge-coupled devices, CCD image sensors, Beam splitters, X-rays, Sensors, Phase matching

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Proceedings Article | 12 May 2015 Paper

Paper

Grating-based pulse compressor for applications to FEL sources

Luca Poletto, Fabio Frassetto, Paolo Miotti, David Gauthier, Marta Fajardo, Benoit Mahieu, Cristian Svetina, Marco Zangrando, Philippe Zeitoun, Giovanni De Ninno

Proceedings Volume 9512, 951210 (2015) https://doi.org/10.1117/12.2182381

KEYWORDS: Free electron lasers, Diffraction gratings, Code division multiplexing, Diffraction, Optical design, Dispersion, Grazing incidence, Collimation, Ultrafast phenomena, Reflectivity

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Proceedings Article | 12 May 2015 Paper

Paper

Optically induced Fe magnetization reversal in Fe/MnAs/GaAs(001)

C. Spezzani, E. Ferrari, E. Allaria, F. Vidal, L. Lounis, A. Ciavardini, R. Delaunay, F. Capotondi, E. Pedersoli, M. Coreno, C. Svetina, L. Raimondi, M. Zangrando, R. Ivanov, I. Nikolov, A. Demidovich, M. Danailov, G. De Ninno, H. Popescu, M. Eddrief, M. Kiskinova, M. Sacchi

Proceedings Volume 9512, 95120I (2015) https://doi.org/10.1117/12.2184710

KEYWORDS: Iron, Pulsed laser operation, Picosecond phenomena, Magnetism, Laser optics, Laser scattering, Free electron lasers, Reflectivity, Scattering, Diffusion

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Proceedings Article | 10 October 2014 Paper

Paper

The experience of the FERMI@Elettra photon beam transport and diagnostics system (PADReS) during three years of continuous support of machine and user experiments: achievements, lessons learned, and future upgrades

Marco Zangrando, Claudio Fava, Simone Gerusina, Riccardo Gobessi, Nicola Mahne, Eric Mazzucco, Lorenzo Raimondi, Luca Rumiz, Cristian Svetina

Proceedings Volume 9210, 921003 (2014) https://doi.org/10.1117/12.2062980

KEYWORDS: Free electron lasers, Diagnostics, Spectroscopy, Mirrors, Photon transport, Active optics, YAG lasers, Electron beams, Interfaces, Image processing

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Proceedings Article | 8 October 2014 Paper

Paper

Polarization measurement of free electron laser pulses in the VUV generated by the variable polarization source FERMI

P. Finetti, E. Allaria, B. Diviacco, C. Callegari, B. Mahieu, J. Viefhaus, M. Zangrando, G. De Ninno, G. Lambert, E. Ferrari, J. Buck, M. Ilchen, B. Vodungbo, N. Mahne, C. Svetina, C. Spezzani, S. Di Mitri, G. Penco, M. Trovò, W. Fawley, P. Rebernik, D. Gauthier, C. Grazioli, M. Coreno, B. Ressel, A. Kivimäki, T. Mazza, L. Glaser, F. Scholz, J. Seltmann, P. Gessler, J. Grünert, A. De Fanis, M. Meyer, A. Knie, S. Moeller, L. Raimondi, F. Capotondi, E. Pedersoli, O. Plekan, M. Danailov, A. Demidovich, I. Nikolov, A. Abrami, J. Gautier, J. Lüning, P. Zeitoun, L. Giannessi

Proceedings Volume 9210, 92100K (2014) https://doi.org/10.1117/12.2062717

KEYWORDS: Polarization, Polarimetry, Free electron lasers, Vacuum ultraviolet, Wave plates, Luminescence, Visible radiation, Mirrors, Dichroic materials, Photon polarization

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Proceedings Article | 17 September 2014 Paper

Paper

Status of the K-B bendable optics at FERMI@Elettra FEL

L. Raimondi, C. Svetina, N. Mahne, D. Cocco, F. Capotondi, E. Pedersoli, M. Manfredda, M. Kiskinova, B. Keitel, G. Brenner, E. Plönjes, T. Mey, K. Mann, M. Zangrando

Proceedings Volume 9208, 920804 (2014) https://doi.org/10.1117/12.2062326

KEYWORDS: Mirrors, Free electron lasers, Diffraction, Wavefronts, Polymethylmethacrylate, Point spread functions, Wavefront sensors, Imaging systems, Metrology, X-ray optics

Read Abstract +

FERMI is the first seeded EUV-SXR free electron laser (FEL) user facility operated at Elettra Sincrotrone Trieste. Two of the three already operating beamlines, namely LDM (Low DensityMatter) and DiProI (Diffraction and Projection Imaging), use a Kirkpatrick-Baez (K-B) active X-ray optics system for focusing the FEL pulses onto the target under investigation. The present work reports on the final results obtained from the optimization of the K-B optical system at the DiProI endstation. The aim of the optimization is to improve the system performances in terms of quality and size of the focal spot onto the sample, controlling the fluence as well. To characterize the performances and develop reliable and reproducible focusing procedures we performed a campaign of measurements with several diagnostic systems, including a wavefront sensor mounted after the DiProI chamber. Online wavefront measurements have made possible the optimization of the bending acting on the mirror curvature and of the (pitch and roll) angle positions of the K-B system. From the wavefront measurements we have inferred a focal spot of 8 μm x 9.5 μm, confirmed by the PMMA ablation imprints. The experimental results are compared with the predictions from simulations obtained using the WISE code, starting from the characterization of the actual mirror surface metrology. The results from simulations are in agreement with the experimental measurements. Filtering the Fourier transform of the mirror surface profiles, using the WISE code we have analyzed the impact of different spatial wavelengths on the focal spot degradation. For different energies of the incident beam we established the threshold where the focal spot degradation is no longer affected by the spatial wavelengths of the K-B mirror surfaces. In the very last period we were starting to observe a degradation of the focal spot. After a metrology analysis we concluded that the problem was due to a failure of the substrate material. We temporally solved the problem checking the mounting, but we have planned an improvement of the material for the future.

Proceedings Article | 5 September 2014 Paper

Paper

MagneDyn: the future beamline for ultrafast magnetodynamical studies at FERMI

Cristian Svetina, Martina Dell'Angela, Nicola Mahne, Marco Malvestuto, Fulvio Parmigiani, Lorenzo Raimondi, Marco Zangrando

Proceedings Volume 9207, 92070E (2014) https://doi.org/10.1117/12.2062254

KEYWORDS: Mirrors, Spectroscopy, X-rays, Magnetism, Free electron lasers, Sensors, Scattering, Ultrafast phenomena, X-ray optics, Beam propagation method

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Proceedings Article | 30 September 2013 Paper

Paper

Status and achievements at FERMI@Elettra: the first double cascade seeded EUV-SXR FEL facility open to users

Cristian Svetina, Nicola Mahne, Lorenzo Raimondi, Luca Rumiz, Marco Zangrando, Enrico Allaria, Filippo Bencivenga, Carlo Callegari, Flavio Capotondi, Davide Castronovo, Paolo Cinquegrana, Paolo Craievich, Ivan Cudin, Massimo Dal Forno, Miltcho Danailov, Gerardo D'Auria, Raffaele De Monte, Giovanni De Ninno, Alexander Demidovich, Simone Di Mitri, Bruno Diviacco, Alessandro Fabris, Riccardo Fabris, William Fawley, Mario Ferianis, Eugenio Ferrari, Lars Froehlich, Paolo Furlan Radivo, Giulio Gaio, Luca Giannessi, Maya Kiskinova, Marco Lonza, Benoit Mahieu, Claudio Masciovecchio, Ivaylo Nikolov, Fulvio Parmigiani, Emanuele Pedersoli, Giuseppe Penco, Mauro Predonzani, Emiliano Principi, Fabio Rossi, Claudio Scafuri, Claudio Serpico, Paolo Sigalotti, Simone Spampinati, Carlo Spezzani, Michele Svandrlik, Mauro Trovo, Alessandro Vascotto, Marco Veronese, Roberto Visintini, Dino Zangrando

Proceedings Volume 8849, 88490O (2013) https://doi.org/10.1117/12.2023920

KEYWORDS: Free electron lasers, YAG lasers, Mirrors, Pulsed laser operation, Calibration, Diagnostics, Electron beams, Switching, Sensors, X-rays

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Proceedings Article | 27 September 2013 Paper

Paper

K-B bendable system optimization at FERMI@Elettra FEL: impact of different spatial wavelengths on the spot size

L. Raimondi, C. Svetina, N. Mahne, D. Cocco, F. Capotondi, E. Pedersoli, M. Kiskinova, B. Keitel, G. Brenner, E. Plönjes, T. Mey, K. Mann, M. Zangrando

Proceedings Volume 8848, 88480B (2013) https://doi.org/10.1117/12.2023024

KEYWORDS: Mirrors, Free electron lasers, Wavefronts, Wavefront sensors, Diffraction, Polymethylmethacrylate, Point spread functions, Computer simulations, Atomic force microscopy, X-ray optics

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Proceedings Article | 3 May 2013 Paper

Paper

Four wave mixing using coherent FEL radiation

F. Bencivenga, L. Raimondi, C. Svetina, C. Masciovecchio

Proceedings Volume 8778, 877807 (2013) https://doi.org/10.1117/12.2021806

KEYWORDS: X-rays, Free electron lasers, Mirrors, Diffraction gratings, Diffraction, Four wave mixing, X-ray optics, Photon polarization, Polarization, Monochromators

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Proceedings Article | 19 October 2012 Paper

Paper

An active optics system for EUV/soft x-ray beam shaping

C. Svetina, D. Cocco, A. Di Cicco, C. Fava, S. Gerusina, R. Gobessi, N. Mahne, C. Masciovecchio, E. Principi, L. Raimondi, L. Rumiz, R. Sergo, G. Sostero, D. Spiga, M. Zangrando

Proceedings Volume 8503, 850302 (2012) https://doi.org/10.1117/12.929701

KEYWORDS: Mirrors, Actuators, Free electron lasers, Active optics, Beam shaping, Interferometers, X-rays, Metrology, Wavelength division multiplexing, Resistance

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Proceedings Article | 15 October 2012 Paper

Paper

The photon beam transport and diagnostics system at FERMI@Elettra, the Italian seeded FEL source: commissioning experience and most recent results

Marco Zangrando, Alessandro Abrami, Daniele Cocco, Claudio Fava, Simone Gerusina, Riccardo Gobessi, Nicola Mahne, Eric Mazzucco, Lorenzo Raimondi, Luca Rumiz, Cristian Svetina, Fulvio Parmigiani

Proceedings Volume 8504, 850404 (2012) https://doi.org/10.1117/12.929749

KEYWORDS: Free electron lasers, Diagnostics, Mirrors, Electron beams, Photon transport, YAG lasers, Spectroscopy, Beam propagation method, Modulators, Modulation

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Proceedings Article | 28 September 2011 Paper

Paper

Characterization of the FERMI@Elettra's on-line photon energy spectrometer

Cristian Svetina, Alessandro Abrami, Ivan Cudin, Claudio Fava, Simone Gerusina, Riccardo Gobessi, Luca Rumiz, Giovanni Sostero, Marco Zangrando, Daniele Cocco

Proceedings Volume 8139, 81390J (2011) https://doi.org/10.1117/12.892707

KEYWORDS: Spectroscopy, Diffraction gratings, Free electron lasers, Diffraction, Metrology, Spatial frequencies, Diagnostics, X-rays, Energy efficiency, Sensors

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Proceedings Article | 21 May 2011 Paper

Paper

First results from the commissioning of the FERMI@Elettra free electron laser by means of the Photon Analysis Delivery and Reduction System (PADReS)

M. Zangrando, I. Cudin, C. Fava, S. Gerusina, R. Gobessi, R. Godnig, L. Rumiz, C. Svetina, F. Parmigiani, D. Cocco

Proceedings Volume 8078, 80780I (2011) https://doi.org/10.1117/12.886459

KEYWORDS: Free electron lasers, Spectroscopy, Diagnostics, Safety, Beam propagation method, Photon transport, Photonics systems, Pulsed laser operation, Mirrors, Visible radiation

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Proceedings Article | 19 May 2011 Paper

Paper

Probing matter under extreme conditions at Fermi@Elettra: the TIMEX beamline

Andrea Di Cicco, Filippo Bencivenga, Andrea Battistoni, Daniele Cocco, Riccardo Cucini, Francesco D'Amico, Silvia Di Fonzo, Adriano Filipponi, Alessandro Gessini, Erika Giangrisostomi, Roberto Gunnella, Claudio Masciovecchio, Emiliano Principi, Cristian Svetina

Proceedings Volume 8077, 807704 (2011) https://doi.org/10.1117/12.887633

KEYWORDS: Free electron lasers, Mirrors, Electrons, Absorption, Aluminum, X-rays, Sensors, Condensed matter, Ultrafast phenomena, Optical filters

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Proceedings Article | 19 May 2011 Paper

Paper

FEL multilayer optics damaged by multiple laser shots: experimental results and discussion

A. Giglia, N. Mahne, A. Bianco, C. Svetina, R. Cucini, L. Vysin, T. Burian, L. Juha, S. Nannarone

Proceedings Volume 8077, 807711 (2011) https://doi.org/10.1117/12.886845

KEYWORDS: Molybdenum, Reflectivity, Silicon, Extreme ultraviolet, Silica, Interfaces, Free electron lasers, Mirrors, X-rays, Laser damage threshold

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Proceedings Article | 9 September 2009 Paper

Paper

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

Cristian Svetina, Marco Zangrando, Anna Bianco, Daniele Cocco

Proceedings Volume 7448, 74480O (2009) https://doi.org/10.1117/12.824445

KEYWORDS: Free electron lasers, Monochromators, Mirrors, Diffraction, Wavefronts, Diffraction gratings, Spherical lenses, Light sources, Optical design, Manufacturing

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Proceedings Article | 18 May 2009 Paper

Paper

The FERMI@Elettra FEL photon transport system

D. Cocco, A. Abrami, A. Bianco, I. Cudin, C. Fava, D. Giuressi, R. Godnig, F. Parmigiani, L. Rumiz, R. Sergo, C. Svetina, M. Zangrando

Proceedings Volume 7361, 736106 (2009) https://doi.org/10.1117/12.822237

KEYWORDS: Mirrors, Free electron lasers, Wavefronts, Multilayers, Reflectivity, Monochromators, Safety, Camera shutters, Photon transport, Coating

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Showing 5 of 22 publications

Conference Committee Involvement (1)

Adaptive X-Ray Optics V

21 August 2018 | San Diego, California, United States

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