SYLOS Gas Attosources Group

SYLOS Gas Attosources Group

 Group members:

Dr. Sergei Kühn (group leader, senior researh fellow, SYLOS GHHG COMPACT lab manager)


Dr. Mathieu Dumergue (research fellow)



Arjun Nayak Puttur (early-stage researcher)


Balázs Farkas (research fellow, SYLOS GHHG LONG lab manager)

Dr. Zsolt Divéki (research fellow)


Balázs Nagyillés (early-stage researcher)




Secondary sources concerned:


ELI-ALPS Single Cycle Laser system based gas high order harmonics generation compact beamline (SYLOS GHHG COMPACT)


ELI-ALPS Single Cycle Laser system based gas high order harmonics generation long beamline (SYLOS GHHG LONG)


The expected XUV output of this beamline:


1 kHz

Photon energy range:

17-100 eV

Pulse energy:

0.1-100 nJ (in case of single attosecond pulse);

1-1000 nJ (in case of train of attosecond pulses)



R&D activity


The activities of the SYLOS GHHG group are centered on the generation of attosecond pulses in the XUV spectral range which are provided for user experiments in various fields of ultrafast and attosecond sciences. To this end the group implements, operates and maintains two high-order harmonic beam lines which have been specifically designed to utilize the laser pulse parameters delivered from the SYLOS laser system. The major challenge regarding the state-of-the-art systems is upscaling to high peak powers, and efficiently phasematching the generated radiation.


The scope of these activities also encompasses comprehensive diagnostics of the attosecond pulses, technology to split and combine pulses of the same or other wavelengths as well as a set of built-in experimental tools (various time-of-flight spectrometers, photon spectrometers and ion microscopes). A set of specialized end-stations is also maintained and operated by the group to facilitate user experiments in the most convenient manner. Aside from these user related services, the group pursues active research to further extend the capabilities of the XUV pulse sources and diagnostics, and their application in attosecond science.




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