The ICNO is "among the most ambitious scientific projects ever attempted". The picture illustrates the structure well: 86 cores were drilled 1 1/2 to 2 1/2 km into the ice with 60 sensors per string and 6 of those strings dedicated to extra depth. The ice is clear as glass at those depths and when once in a while a neutrino (one of three types) happens to interact with a bit of ice matter, the by product includes a speck of light called Cerenkov radiation. Beautiful.
|"Bert" - at 1.04 petaelectronvolts is the highest |
energy neutrino ever detected.
Science Daily News reporting on ICNO.
|View down one shaft, insulated at the top.|
Notes: Information and view down the bore hole are from spaceref site