Dr. Nathaly Santiesteban University of New Hampshire Abstract: The deuteron, the lightest bound nuclear system, is a weakly bound state of two spin-1/2 nucleons whose internal structure provides a uniquely rich laboratory for exploring the dynamics of quarks and gluons in nuclei. Its spin-1, tensor-polarized structure encodes information that cannot be accessed from the proton and neutron alone, offering a powerful window into the roles of spin, orbital motion, and short-range correlations in nuclear systems. Despite decades of experimental and theoretical study, key aspects of this structure remain unmeasured, and a complete description of the deuteron is still lacking. This talk presents a current experimental program at Jefferson Lab designed to address these open questions through electron scattering from a fixed, tensor-polarized deuteron target. The discussion will focus on potential measurements of Transverse Momentum Distributions (TMDs) in a spin-1 nucleus, aimed at revealing the correlated momentum and spin structure of quarks and gluons in a bound state. One-dimensional, longitudinal-momentum-dependent tensor structure functions are extracted from inclusive deep-inelastic scattering, while three-dimensional tensor structure functions, with explicit transverse-momentum dependence, are accessed through semi-inclusive deep-inelastic scattering. These measurements offer a unique opportunity to map the multidimensional structure of the deuteron and to deepen our understanding of how quarks and gluons form and bind the simplest nucleus.