Semi-Inclusive, Single Pion Electro-production from a Deuterium Target.

Relative to the case for the proton, very little is known of Semi-Inclusive Deep Inelastic Scattering (SIDIS) physics resulting from a deuteron target. Electrons with energy of 5.3 GeV are used on both deuteron and proton targets to study single pion production in the SIDIS framework for all 3 pion charge states. What makes this specific experiment unique is that it offers a virtually free neutron target by tagging protons with momentum 70-150 MeV and scattering angle greater than 90$^{0}$ called `spectators' that are detected by a radial time projection chamber that uses gaseous electron multipliers. The scattered electrons and resulting pions are then detected in the CEBAF Large Acceptance Spectrometer. The kinematic range covered is $W>2$GeV, $Q^2>1$GeV$^{2}$, $0.1