  Solid-state or crystal acceleration has for long been regarded as an
attractive frontier in advanced particle acceleration. However, experimental
investigations of solid-state acceleration mechanisms which offer $\rm
TVm^{-1}$ acceleration gradients have been hampered by several technological
constraints. The primary constraint has been the unavailability of attosecond
particle or photon sources suitable for excitation of collective modes in bulk
crystals. Secondly, there are significant difficulties with direct
high-intensity irradiation of bulk solids, such as beam instabilities due to
crystal imperfections and collisions etc.
  In this work, we model an experimentally practicable solid-state acceleration
mechanism using collective electron oscillations in crystals that sustain
propagating surface waves. These surface waves are driven in the wake of a
submicron long particle beam in tube shaped nanostructured crystals with tube
wall densities, $n_{\rm tube}\sim10^{22-24}\rm cm^{-3}$. Particle-In-Cell (PIC)
simulations carried out under experimental constraints demonstrate the
possibility of accessing average acceleration gradients of several $\rm
TVm^{-1}$ using the solid-state tube wakefield acceleration regime.
Furthermore, our modeling demonstrates the possibility that as the surface
oscillations and resultantly the surface wave transitions into a nonlinear or
"crunch-in" regime under $n_{\rm beam}/n_{\rm tube} \gtrsim 0.05$, not only
does the average gradient increase but strong transverse focusing fields extend
down to the tube axis. This work thus demonstrates the near-term experimental
realizability of Solid-State Tube Wakefield Accelerator (SOTWA). (truncated to
comply with submission requirements)
