The files under this record contain the data that can be used to recreate the figures in the paper titled "Applicability of Alkali Beam Emission Spectroscopy on NSTX-U" published in Review of Scientific Instruments. This study proved that the alkali beam emission spectroscopy (ABES) technique can be applied to the NSTX-U spherical tokamak for electron density profile and fluctuation measurements. This was proven by analyzing the photon emission current, the resulting signal-to-noise ratio, the atomic physics smearing, the geometrical smearing, and the fluctuation-response matrix of the proposed ABES system.