The construction of ever larger and costlier accelerator facilities will eventually require new technologies to push the energy frontier. Plasma Wakefield acceleration (PWA) is a rapidly developing field which appears to be a promising candidate technology for future high-energy accelerators. Proton Driven PWA has been proposed as an approach to accelerate an electron beam to the TeV energy regime in a single plasma structure. The advantage of proton- over laser- or electron-driven PWA is the high stored energy available in the driver; both for the bunch as a whole and for the individual drive particles. Existing proton bunches carry many kJ of stored energy while high power lasers are presently approaching the 1-5 J regime. Proton bunches are therefore promising drivers for high-energy lepton accelerators, with the potential of reducing drastically the number of required driver stages.
Edda Gschwendtner (CERN)