A friend (Byron Sinor, physics god... well, major) suggested this way to
have a neutrino-in-a-suitcase:
A portion of space within the box is heated to the point at which
physical laws rejoin (just about, oh, 300 million to 10 billion times
the core temperature of the sun, maybe much more). At that point,
neutrinos passing into this area will interact easily with other
particles. There is a 'decoupling' area, at which neutrino interactions
will jump to a great number of interactions.
Of course, the amount of energy involved is HIDEOUS. There are other
details: neutrinos will COOL this area, as their energy is much less.
That means a high-neutrino burst will cool your detector below threshold
level...
The world is much stranger than we'd like. That's the problem with
growing up... the universe doesn't try to make things easy for us.
(That's also why science fiction is so much harder than fantasy...
fantasy is human)
- -Me