Plasma wakefield acceleration (PWFA) has shown illustrious
progress and resulted in an impressive demonstration of tens of GeV
particle acceleration in meter-long single structures. To reach even
higher energies in the 1 TeV to 10 TeV range, a promising scheme
is channeling acceleration in solid-density plasmas within crystals
or nanostructures.
The E336 experiment studies the beam-nanotarget interaction
with the highly compressed electron bunches available at the
FACET-II accelerator. These studies furthermore involve an in-depth
research on dynamics of beam-plasma instabilities in ultra-dense
plasma, its development and suppression in structured media like
carbon nanotubes and crystals, and its potential use to transversely
modulate the electron bunch.