THz-wakefield generation by modulated electron beams resonating with crystalline plasma channels

We have been investigating THz photon emission/absorption dynamics of high energy electrons channeled through crystalline nanostructures. Preliminary plasma wakefield simulations, employing particle-in-cell (PIC) computations, indicated that a short-pulse (σ ~ 1 ps) electron beam, modulated with 28.4 THz, generates an intense plasmonic wave of ~ 0.3 TeV/m in a plasma channel with a crystalline electronic density (~ 10²⁵ cm^-3). For experimental verification of the beam-driven THz-wakefield generation, Au-plated and carbon nanotube (CNT)-embedded anodic aluminum-oxide (AAO) templates are being considered for the high energy beam tests (20-50 MeV and 3.2 nC) with ~ 3 THz modulation, at the Fermilab Advanced Superconducting Test Accelerator (ASTA) facility.