  The Long Baseline Neutrino Experiment (LBNE) will utilize a neutrino beamline
facility located at Fermilab. The facility is designed to aim a beam of
neutrinos toward a detector placed at the Deep Underground Science and
Engineering Laboratory (DUSEL) in South Dakota. The neutrinos are produced in a
three-step process. First, protons from the Main Injector hit a solid target
and produce mesons. Then, the charged mesons are focused by a set of focusing
horns into the decay pipe, towards the far detector. Finally, the mesons that
enter the decay pipe decay into neutrinos. The parameters of the facility were
determined by an amalgam of the physics goals, the Monte Carlo modeling of the
facility, and the experience gained by operating the NuMI facility at Fermilab.
The initial beam power is expected to be ~700 kW, however some of the
parameters were chosen to be able to deal with a beam power of 2.3 MW.
