CERN Accelerating science





The Extreme Light Infrastructure (ELI) project is an integral part of the European plan to build the next generation of large research facilities identified and selected by the European Strategy Forum on Research Infrastructures. By 2018 ELI will be the first infrastructure in the world to enable the investigation of the interaction between matter and light at the highest intensity, in the so-called ultra-relativistic range. It will open a doorway into new territories within physics and new technical developments.

The main objective of ELI Attosecond LightPulse Source (ELI- ALPS) is to establish a unique attosecond facility which provides developers and users with light sources within the THz (1012 Hz) to X-ray (1018-1019 Hz) frequency range in the form of ultrashort pulses at high repetition rate. The ELI-ALPS infrastructure will provide the users with primary laser pulses and the unique combination of secondary light and particle pulses generated by the primary pulses. These outstanding characteristics of the laser source are expected to attract users from various fields of sciences and industry:

• few-cycle pulses starting from the terahertz/ infrared spectral range up to the petahertz/ ultraviolet range with a 10 Hz to 100 kHz repetition rate

• attosecond extreme-ultraviolet, soſt X-ray and hard X-ray pulses at 100 kHz and 10 Hz repetition rate, with up to millijoule pulse energy;

• sub-femtosecond hard x-ray pulses, reaching several-10-keV photon energy;

• controlled ultra-relativistic pulse shapes with ultra-high contrast at a few-Hz repetition rate;

• precise synchronization of the above light sources.

The coordination of the preparation and implementation of the project in Hungary is managed by ELI-HU Non-profit Ltd.