If you're sending neutrinos at a known energy from a known location and in a narrow time-coincidence window, you can hammer most backgrounds way down. The low

If you're sending neutrinos at a known energy from a known location and in a narrow time-coincidence window, you can hammer most backgrounds way down. The low detection rate isn't so terrible either -- one only needs the bits that are detected to be tradably-correct almost-all the time. The hard part is arranging to make enough money to fund the accelerator and detector.