  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 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. The LBNE Neutrino Beam has made significant changes to the initial design
through consideration of numerous Value Engineering proposals and the current
design is described.
