Interaction of ultrarelativistic electron and proton bunches with dense   plasmas
  Here we discuss the possibility of employment of ultrarelativistic electron and proton bunches for generation of high plasma wakefields in dense plasmas due to the Cherenkov resonance plasma-bunch interaction. We estimate the maximum amplitude of such a wake and minimum system length at which the maximum amplitude can be generated at the given bunch parameters. 
A. A. Rukhadze and S. P. Sadykova
physics.plasm-ph