  We propose an experiment in which the phonon excitation of ion(s) in a trap,
with a trap frequency exponentially modulated at rate $\kappa$, exhibits a
thermal spectrum with an "Unruh" temperature given by T=hbar*kappa. We discuss
the similarities of this experiment to the usual Unruh effect for quantum
fields and uniformly accelerated detectors. We demonstrate a new Unruh effect
for detectors that respond to anti-normally ordered moments using the ion's
first blue sideband transition.
