Measurement of the Target Single-Spin Asymmetry in Quasi-Elastic $^3$He$^{\uparrow}$(e,e')

Nuclear and nucleon structure are often studied by measuring form factors using the Born approximation, which assumes one-photon exchange, with multiple-photon exchanges neglected, so the target single-spin asymmetry is expected to be zero in the Born approximation. The Jefferson Lab experiment E05-015 was devoted to the measurement of the neutron target single-spin asymmetry, A$^n_y$, using the inclusive quasi-elastic $^3$He$^{\uparrow}$(e,e') reaction with a vertically polarized $^3$He target and standard Hall A high resolution spectrometers at Q$^2$=0.13, 0.46 and 0.97 (GeV/c)$^2$. The non-zero results from this experiment clearly demonstrate the contribution of two-photon exchange, providing new constraints on Generalized Parton Distribution Models and new information on the dynamics of the two-photon exchange process. Details of this experiment and a very preliminary result will be presented.