The amplitude dependent mechanical loss due to bosing of an idealized Frank-Read Source is studied using both simulation and analytical techniques. Dislocations are modeled within isotropic elasticity theory, and are assumed to be in the over-damped limit.

A quantitative comparison is reported between first principle calculations and experiments imaging the column positions around the core of partial dislocations in GaAs. The influence of residual lens aberrations on the determination of column positions is investigated.