Re:The physics anomaly no one talks about: What’s up with th...
by antognini on Sunday September 19, 2021 @07:34PM
(#28588945)
The neutrino experiments aren't underground to shield them from background neutrinos. There is no way to shield background neutrinos. They are underground to shield them from other particles that can produce experimental signatures that look similar to neutrinos.
So you're detecting all neutrinos, but you're looking in an energy range where the signal you're interested in rises above the background levels.
That's part of the problem. Which Neutrinos are you measuring? The ones from your experiment, the ones from the Sun, the ones from the environment? They're exceptionally light particles, so effective shielding is difficult.
It's why a lot of these experiments are deep underground. The one I visited was in northern Minnesota in an old abandoned Mine placed half a mile under the surface and positioned in such a way to receive a neutrino beam all the way from Fermilab in Chicago.
The smaller and lighter the phenomenon, the larger your laboratory needs to be come.
https://en.wikipedia.org/wiki/MINOS