Ion-extraction polarimetry for a polarized 1H/2H internal target

We report on the development of a polarimeter for measuring in-situ the tensor polarization of a deuterium internal target in an electron ring. The method takes advantage of the ionization of atoms and molecules by the stored electron beam passing through the target cell. The number of ions produced along the storage cell is directly proportional to the product of target density and beam current. The total target polarization can be obtained independent of its spatial and temporal variations by uniformly extracting these ions from the cell, measuring their atomic and molecular fractions, and by directly determining their nuclear polarization. copyright 1998 American Institute of Physics