Detection is via quite a simple method if I understand correctly - in the paper, section 7. It's basically a big camera. It's hundreds of stacked layers of tung

Detection is via quite a simple method if I understand correctly - in the paper, section 7. It's basically a big camera. It's hundreds of stacked layers of tungsten and photo emulsion. Big heavy stuff because it (presumably) has a higher interaction cross section, but this obviously isn't practical to build at scale. There are also several downstream instruments to measure particle properties once they exit the emulsion block, and "veto" layers to ignore muons which get into the detector, but neutrino+tungsten is what causes the magic to happen. The layers are also stacked in such a way that different flavours can be identified. You don't detect neutrinos, you detect the things they create when they interact with other atoms (in this case Tungsten). These particles then interact with the emulsion to form tracks. You can read more about it here: https://cerncourier.com/a/nuclear-emulsions/ https://cerncourier.com/a/nuclear-emulsions/ 3-4 times a year they take all the emulsions out and process them. Apparently that's often enough and they can see 10^6 tracks per cm2. On IceCube: it's a telescope. It's designed to locate the source of extra-galactic or other extremely high energy neutrinos. The flux of these neutrinos is lower and the larger the detector the better - not just for detection probability, but for angular resolution on the sky. Ice happens to be a good medium for Cerenkov radiation (other neutrino detectors work by looking for the ~blue light that the interaction products emit as they travel). The other option for a detector that large is under the sea, as there is no light after a few hundred metres (ANTARES is over 1km down), but there's more background/biological radiation and the sea moves... IceCube is also shearing a small amount, but significantly less. Despite the harsh environment, it's an incredibly reliable detector - cold and dry is probably nicer than salt water.