SPIN-DEPENDENT ELECTROMAGNETIC RESPONSE OF FEW-BODY SYSTEMS

We report on the experimental program with polarized electrons and pol arized few-body systems at the internal target facility of the NIKHEF electron storage ring. With a polarized deuterium internal target, abs olute measurements of unprecedented accuracy have been performed for t he analyzing powers T-20 and T-22 in elastic electron-deuteron scatter ing at transferred four-moments 1.1 < Q < 2.8 fm(-1). Results for a fi rst measurement of the tensor analyzing power ill quasi-elastic scatte ring are also presented. These data provide new constraints for descri ptions of the deuteron spin structure and for reaction mechanism effec ts. Quasi-elastic electron scattering from polarized He-3 mag provide precise information on the S' and the D-wave parts of the He-3 ground- state wave function, the neutron form factors, and the role of spin-de pendent reaction mechanism effects. We have started an experimental pr ogram at NIKHEF where polarized He-3 and polarized electrons are used, in combination with large acceptance electron and hadron detectors. D ata were taken for the transverse (A(y)(O)) and longitudinal (A(z)(')) asymmetries at Q similar or equal to 2 fm(-1). We outline the performa nce of the target and detectors.