  We study the quantum radiation of particle production by vacuum from an
ultra-relativistic moving mirror (dynamical Casimir effect) solution that
allows (possibly for the first time) analytically calculable time evolution of
particle creation and an Airy particle spectral distribution. The reality of
the beta Bogoliubov coefficients is responsible for the simplicity, and the
mirror is asymptotically inertial at the speed of light, with finite energy
production. We also discuss general relations regarding negative energy flux,
the transformation to the 1-D Schr{\"o}dinger equation, and the incompleteness
of entanglement entropy.
