Neutrinos, from to be detect to use to detect

The neutrino was theorized in 1930 by Wolfgang Pauli and detected form the first time in 1956. During this long time since now this particle have some veil of uncertainty because of its really small mass, it was not much affected by big masses. Also this particle doesn't interact much with the rest of the matter then is able to pass along out planet without contact. Also because of its small mass this particles travels at speeds close to the light.

Really big structures has need to detect this avoids particle. In order to find some of this not much interactions a huge detector is required Super-Kamiokande. A huge pool of water, in a dark place down to the Earth surface, with a large number of photo amplifiers who multiplies any small interaction.

This can change if a core planet study project go ahead. Right now we are using seismic waves to study the structure of this big mass where we live (relatively big, do not compare it with Jupiter, neither the sun, and in any case with Antares). The seismic waves interact with all the matter in the middle to the core (it means noise), but neutrinos has the other extreme characteristic they will interact a little with the core, but more that the rest of the panetary matter.

Do not forget that the elementary material of the ringworld absolves the 40% of the neutrinos...