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Deadtime: Need accurate accounting for deadtime and efficient monitoring of detectors in this accounting
Target Systematics: (Can be different for proton and deuteron)
Know Uncertainty in polarized target: TE, Temp/pressure measurements, baseline, mag field drifts, charge averaging, NMR tune drifts, area measurements
Dilution Factor: Must be measured and calculated
Packing Fraction: Must be measured and calculated
Initial Polarization Homogeneity: Microwave induced differences
Beam Heating Polarization Effects: Secondaries scatterng off the down stream end might heat things up to lower the polarizaton
Uneven decays in Polarization: The target receives a different dose over its length