Unlike the homophonic term from _Star Trek_, a FASER (Fermion
Amplification by Stimulated Emission of Radiation) is really a device
which would be useful in performing interferometric experiments with
some of the more elusive elementary particles, such as the neutrino.
In particular, the accurate measurement of the neutrino mass should be
possible with a FASER.

In constrast to a LASER, which produces coherent states of large
numbers of photons, which are bosons, the tricky part of the FASER is
that we now deal with fermions, whose statistics are quite different
from bosons, and which a priori don't admit such coherent states....

One idea would be to "align and confine" a gas of electrons with
appropriate electromagentic radiation, and interact this with
a similarly prepared positrons: the output should be a great deal of
coherent 511Kev gamma rays, and a similar clutch of coherent neutrinos.

The details are probably going to end up "classified", so they will
not be posted here....