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DOE/Fermi National Accelerator Laboratory
The ICARUS detector has been collecting test data in preparation for the official start of the physics data collection later this year. The left panel shows an electron neutrino interaction that produced a proton (top track) and an electron, which produced an electromagnetic shower with photons and electrons (bottom tracks). The right panel shows a muon neutrino interaction that produced a proton (short track, top left) and a muon (3.4-meter-long track); a cosmic-ray track independent of the muon neutrino interaction is also visible in the lower half of the image. In both panels, the neutrino beam came from left. (Image: ICARUS collaboration)