ausblenden:
Schlagwörter:
AWAKE
Zusammenfassung:
Plasma wakefield accelerators (PWFAs) typically use particle bunches with a length shorter than the wakefield period to drive wakefields. The Advanced Wakefield Experiment (AWAKE) takes advantage of the large stored energy in proton bunches from the CERN SPS to drive wakefields. Since these proton bunches are ∼ 8cm long, but ∼ mm long bunches are necessary to drive ∼ GV/m wakefields in plasma with density ∼ 1015 cm−3, AWAKE relies on the self-modulation (SM) of the proton bunch transforming the long bunch into a train of short bunches. SM is seeded with a relativistic ionization front (RIF) co-propagating within the proton bunch. It was shown experimentally that SM occurs, that the modulation frequency is the plasma frequency and that the SM process grows along the plasma.