NuMi beam line at Fermilab

NuMi beam line at Fermilab

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Caption: When operating at highest intensity, the NuMI beam line transports a package of 20,000 billion protons every two seconds to a graphite target. The target converts the protons into bursts of particles with exotic names such as kaons and pions. Like a beam of light emerging from a flashlight, the particles form a wide cone when leaving the target. A set of two special lenses, called horns (photo), is the key instrument to focus the beam and send it in the right direction. The beam particles decay and produce muon neutrinos, which travel in the same direction. Fermilab completed the construction and testing of the Neutrino at the Main Injector (NuMI) beam line in early 2005. Protons from Fermilab's Main Injector accelerator travel 1,000 feet down the beam line, smash into a graphite target and create muon neutrinos. The neutrinos traverse the MINOS near detector, located at the far end of the NuMI complex, and travel straight through the earth to a former iron mine in Soudan, Minnesota, where they cross the MINOS far detector. Some of the neutrinos arrive as electron neutrinos or tau neutrinos.

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Keywords: accelerator, detector, electron neutrinos, fermilab, horns, kaons, main injector neutrino oscilla, minos, muon neutrinos, muons, neutrino at the main injector, neutrinos, numi, numi beam line, numi horns, particle accelerator, particle physics, person, physics, pions, protons, science, tau neutrinos, tion search

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