Short focal area

The F1 (10PW), F2 (1PW), F3 (creation at 250J and 1ns) F4 (10TW) beams enter the room after crossing the 5m thick walls.

The F1 and F2 beams are focused by off-axis focal parabolas having focal lenghts of 1m for “F1” and 42cm fo “F2”. This focusing with deformable mirror will allow to reach intensities in the order of 2 10²² W/cm².

The interaction enclosure is arranged in such way that the focalisation axis of F1 laser beam are directed towards the room’s corner, thus maximizing the space downstream the focal point. This allows to install secondary interaction chamber where particles or radiation generated in the main chamber would be directed and where further interactions with secondary target assemblies could take place, far from the primary source.

Short focal area – © Frédéric Durillon/Animea Studio

The 1PW beam arrives on the enclosure’s top and can be redirected inside the enclosure in such way that its focus axis can make a variable angle compared to that of F1 which will be fixed. It makes counter-propagating F1 and F2 possible, with a small angle difference (30-40°). It also allows to have F1 and F2 almost perpendicular (at 70°, which is enough to allow radiation or particles to cross the plasmas generated by F1 at 90° by tilting the targets which will be irradiated by F2). Thus, future users will be able to use modular interaction geometries.

The “F3” beam can be transported at several angles and its synchronization ensured by a delay line.

Finally, the “F4” beam as “F2” beam are entering by enclosure’s top and can follows different propagation paths.

Diagram of the short focal length room (F1 beam in red and F2 in pink).