Precision Polarized SIDIS Experiments in Hall-A at 12 GeV Jlab

Single (SSA) and double spin asymmetries (DSA) in semi-inclusive DIS reactions using polarized nucleon targets provide a powerful method to probe transverse momentum dependent parton distribution functions (TMDs). The Jefferson Lab 12 GeV upgrade will provide a unique opportunity to perform such precision measurements and to map out these multi-dimensional PDFs. Future plans for performing these measurements in Hall-A using the Solenoidal Large Intensity Device (SoLID) and polarized proton and 3He (neutron) targets are discussed. The high luminosities from these targets and the large acceptance of the SoLID spectrometer will allow for a 4-dimensional (x, Q^2, z, P_T ) mapping of SSA and DSA. The full azimuthal angular coverage is necessary to untangle various angular moments and thereby reduce the systematic uncertainties. These experiments will provide the most precise data to extract transversity (h1), Sivers (f_1T) and Worm-gear (g_1T and h_1L) distributions of u and d-quarks and provide comprehensive information on the correlation between quark angular momentum and the nucleon's spin.