ELI-ALPS is the facility of the Extreme Light Infrastructure (ELI) dedicated to the generation, research and application of attosecond light pulses. These extremely ultrashort coherent light pulses are formed by High Harmonic Generation (HHG) of a few-cycle IR laser pulse. HHG can occur using gases or from a specially prepared surface and at ELI-ALPS there are four dedicated Gas HHG beamlines and two surface-based beamlines.
The light generated at ELI-ALPS can be categorised as:
These light sources are brilliant; extremely stable, ensuring that every laser pulse is comparable; precisely synchronized with a common clock and guaranteed to run for at least 8 hours/day. ELI-ALPS has been designed and functions so that these light sources can be combined for pump-probe measurement in the attosecond regime.
These optical beamlines are complemented by laser-driven proton, ion and electron beamlines. These particles are generated from relativistic interactions between PW laser pulses and a target: thin films (p+ and ions) and sub-critical density gas targets (e-). These charged particles are subsequently accelerated to extremely high energy (GeV) over an extremely short distance. Independent beamlines are generated using the single cycle (Sylos) and High Field primary lasers.
ELI-ALPS is housed in state-of-the-art facilities exploiting the latest technology in terms of vibration levels, thermal stability, relative humidity, cleanliness and radiation protection. There are 3 different work areas with different level of shielding enabling ELI-ALPS to offer both open and closed experiments. These facilities are complemented by separate chemical, biological and medical support laboratories for in-house sample preparation. There is a large in-house support staff that includes electrical, mechanical and optical workshops.
|Laser Parameters||High repetition rate laser system - HR1||Mid-infrared laser system - MIR|
|Laser type||Fiber CPA with nonlinear post-compression||NOPCPA|
|Photon energy range / wavelength range||700 - 1300 [nm]|
|Peak Photon energy / central wavelenght||1030 [nm]||3180 [nm]|
|Pulse duration FWHM||6.2 [fs]||4 [cycles]|
|Pulse repetition rate||1 * 105 [Hz]||1 * 105 [Hz]|
|Maximum pulse energy||1 [mJ]||1.52 * 10-4 [J]|
|Peak power||1.6 * 1011 [W]|
|Pointing stability on target||10 [%]|
|Beam diameter||8 [mm]||10 [mm]|