  We derive the radiation characteristics of an accelerated, charged particle
in a model due to Caianiello in which the proper acceleration of a particle of
mass $m$ has the upper limit $\mathcal{A}_m=2mc^3/\hbar$. We find two power
laws, one applicable to lower accelerations, the other more suitable for
accelerations closer to $\mathcal{A}_m$ and to the related physical singularity
in the Ricci scalar. Geometrical constraints and power spectra are also
discussed. By comparing the power laws due to the maximal acceleration with
that for particles in gravitational fields, we find that the model of
Caianiello allows, in principle, the use of charged particles as tools to
distinguish inertial from gravitational fields locally.
