Multiple colliding laser pulses for high intensity particle physics studies.*

Apart from maximizing the strength of optical electromagnetic fields achievable at high-intensity laser facilities, the collision of several phase-matched laser pulses has been identified theoretically as a trigger of and way to study various phenomena. These range from the basic processes of strong-field quantum electrodynamics to Cherenkov radiation, emitted by an ultrarelativistic electron in a vacuum due to an induced strong electromagnetic field refraction index larger than unity. We report here on a systematic analysis of different regimes and opportunities, including a synergetic Cherenkov-Compton process, achievable with the concept of multiple colliding laser pulses, for both current and upcoming laser facilities.