Proton Driven Plasma Wakefield Acceleration
  Plasma wakefield acceleration, either laser driven or electron-bunch driven, has been demonstrated to hold great potential. However, it is not obvious how to scale these approaches to bring particles up to the TeV regime. In this paper, we discuss the possibility of proton-bunch driven plasma wakefield acceleration, and show that high energy electron beams could potentially be produced in a single accelerating stage. 
Allen Caldwell, Konstantin Lotov, Alexander Pukhov, Frank Simon