Dr. Paraskevas Tzallas (Group Leader, senior research fellow)
Photo soon available
Zoltán Filus (scientific engineer)
Diagnostics system(s) concerned:
GHHG and SHHG SeSo
The XUV diagnostics concern devices and methods for the measurement of the XUV spectrum, pulse energy, polarization, spatial profile, divergence, spatial and temporal coherence, wavefront, pointing stability, pulse duration, pulse contrast and spectral phase distribution.
Reaction Microscope (ReMi)
The ReMi will provide kinematically complete (meaning both the momentum and the angle of emission) measurements of attosecond or femtosecond pulse induced fragmentation of atoms, molecules and small clusters. It will allow for full coincidence mode operation, so simultaneous detection of charged particles from a single photoionization event.
Magnetic bottle electron spectrometer (MBES)
The different operation modes of the MBES will allow for the measurement of the electron energy and ion mass spectrum with a high resolution, providing a high collection angle for the particles resulting from the interaction of pulsed light sources and the gas phased material.
Velocity-map imaging spectrometer (VMIS)
The VMIS will make it possible to obtain energy- and angle resolved information on ions and electrons resulting from the photoionization or photofragmentation of atoms, molecules or nanoparticles during the interaction with short laser or XUV pulses. Exploiting symmetry of the setup and interaction, VMIS allows for simple reconstruction of the three-dimensional momentum distribution from two-dimensional images through inversion algorithms.
Ion Microscope (IM)
IM is an ion imaging device facilitating the observation of the spatial distribution of the ionization products produced in a focused beam as a function of their mass over charge ratio m/q, i.e. it is an ion mass spectrometer with spatial imaging capability.
The aim of the group is, to provide tools and knowhow for the characterization and applications of the XUV SeSo, to develop novel and extended methods for the XUV characterization, to unify the XUV diagnostics within and beyond SeSo.
Additionally, by developing a numerical code, we theoretically investigate the interaction between external electromagnetic fields and target materials.
Since the spatial profile of the one-dimensional lattice potential determining the band scheme can be
modulated, it provides a possible way to study the outcoming secondary radiations - in this current
case: high-order harmonic emission – from several kind of crystalline materials. Considering quantum
mechanical treatment, the effects of the interference phenomena playing important role in the
emergence of even and odd harmonics can be revealed in this multiband model.
 M. Reduzzi, P. Carpeggiani, S. Kühn, F. Calegari, M. Nisoli, S. Stagira, C. Vozzi, P. Dombi, S. Kahaly, P. Tzallas, D. Charalambidis, K. Varju, K. Osvay, G. Sansone, "Advances in high-order harmonic generation sources for time-resolved investigations." J. Electron Spectrosc. Relat. Phenom. 204, 257 (2015).
 N. Tsatrafyllis, B. Bergues, H. Schröder, L. Veisz, E. Skantzakis, D. Gray, B. Bodi, S. Kuhn, G. D. Tsakiris, D. Charalambidis and P. Tzallas, "The ion microscope as a tool for quantitative measurements in the extreme ultraviolet", Sci. Rep. 6, 21556 (2016).
 E. Skantzakis, S. Chatziathanasiou, P. A. Carpeggiani, G. Sansone, A. Nayak, D. Gray, P. Tzallas, D. Charalambidis, E. Hertz and O. Faucher, "Polarization shaping of high-order harmonics in laser-aligned molecules", Sci. Rep. 6, 39295 (2016).
 S. Chatziathanasiou, S. Kahaly, E. Skantzakis, G. Sansone, R. Lopez-Martens, S. Haessler, K. Varju, G. D. Tsakiris, D. Charalambidis and P. Tzallas, "Generation of Attosecond Light Pulses from Gas and Solid State Media", Photonics 4, 26 (2017).
 S. Kühn, M. Dumergue, S. Kahaly, S. Mondal, M. Füle, T. Csizmadia, B. Farkas, B. Major, Z. Várallyay, F. Calegari, M. Devetta, F. Frassetto, E. Månsson, L. Poletto, S. Stagira, C. Vozzi, M. Nisoli, P. Rudawski, S. Maclot, F. Campi, H. Wikmark, C. L. Arnold, C. M. Heyl, P. Johnsson, A. L’Huillier, R. Lopez-Martens, S. Haessler, M. Bocoum, F. Boehle, A. Vernier, G. Iaquaniello, E. Skantzakis, N. Papadakis, C. Kalpouzos, P. Tzallas, F. Lépine, D. Charalambidis, K. Varjú, K. Osvay, and G. Sansone, "The ELI-ALPS facility: the next generation of attosecond sources" J. Phys. B: At. Mol. Opt. Phys. 50, 132002 (2017).
 P. Tzallas, B. Bergues, D. Rompotis, N. Tsatrafyllis, S. Chatziathanassiou, A. Muschet, L. Veisz, H. Schröder and D. Charalambidis, "Time gated ion microscopy of light-atom interactions" J. Opt. 20, 024018 (2018).