On Friday 17 Nov 2006 5:25 pm, Kiran Jonnalagadda wrote: > On 17/Nov/2006, at 3:25 PM, Casey O'Donnell wrote: > >> Through the earth. It was photographed by the Super-Kamiokande > >> experiment in Japan with 503.8 days and nights of exposure. > > > > The resolution of the image is very interesting it appears to be a > > 64x64 piece of data to generate it (look at the pixel squares, it's > > been blown up). What kind of receptor are they using for neutrinos, > > and why 64x64? > > They spent all that money and 503.8 days for a measly 4 kB image?
Neutrino (and anti-neutrino) detection is being used to detect nuclear explosions - which also release neutrinos. Neutrinos have this nasty habit of thinking that the earth is transparent and tend to pass through unless they are caught by a 64x64 pixel underground Japanese detector. Seismic signatures of underground nuclear blasts can be masked in various ways, but neutrinos have not found out that yet and tend to show themselves. shiv
