  We numerically investigate the acceleration and bunch compression
capabilities of 20 mJ, 0.6 THz-centered coherent terahertz pulses in optimized
metallic dielectric-loaded cylindrical waveguides. In particular, we
theoretically demonstrate the acceleration of 1.6 pC and 16 pC electron bunches
from 1 MeV to 10 MeV over an interaction distance of 20mm, the compression of a
1.6 pC 1 MeV bunch from 100 fs to 2 fs (50 times compression) over an
interaction distance of about 18mm, and the compression of a 1.6 pC 10 MeV
bunch from 100 fs to 1.61 fs (62 times) over an interaction distance of 42 cm.
The obtained results show the promise of coherent THz pulses in realizing
compact electron acceleration and bunch compression schemes.
