Measurements of The Neutrino Flux Using Fine-Grained Tracker

The reference design of the near detector for the LBNE/F experiment is a high-resolution Fine-Grained Tracker (FGT) capable of precisely measuring all four species of neutrinos: $\nu_\mu$, $\nu_e$, $\bar\nu_\mu$ and $\bar\nu_e$. The goals of the FGT is to constrain the systematic errors, below the corresponding statistical error in the far detector, for all oscillation studies; and to conduct a panoply of precision measurements and searches in neutrino physics. We present sensitivity studies -- critical to constraining the systematics in oscillation searches -- of measurements of the absolute and relative neutrino flux using the various techniques: 1) neutrino electron NC (CC) scattering, 2) $\bar\nu_\mu$ proton QE scattering, 3) Coherent $\rho$ production for absolute flux and 4) Low-$\nu$ method for relative flux.