Increased Precision of $^{3}$He target's Polarization Determination Through LabView Automated EPR Measurement for Nulcear Physics Experiments*

Polarized $^{3}$He is used as an effective neutron target in the GDH sum rule, Compton scattering and 3-body photodisintegration experiments. These experiments have been carried out to determine the GDH integral on $^{3}$He from the two-body breakup threshold to the pion production threshold as well as nucleon spin polarizablities and asymmetries. The polarization of the $^{3}$He target is measured through NMR and EPR measurements. To reduce the uncertainties in asymmetries and nucleon spin polarizablities, it is necessary to increase the precision in the measurement of $^{3}$He polarization. In order to achieve this goal, the EPR measurement process was automated by LabView, controlling the electronic instruments through GPIB interface. The calculated $^{3}$He polarization using the LabView program is consistent with the results obtained from NMR water calibration measurements.