Tensor analyzing powers inHe4(d,d)He4elastic scattering between 17 and 45 MeV

Angular distribution measurements were made of the differential cross section $\frac{d\sigma }{d\Omega }$ and the tensor analyzing powers $A_{\mathrm{yy}}$ and $A_{\mathrm{xx}}$ in $d-\alpha$ elastic scattering between deuteron beam energies of 17 and 45 MeV. The analyzing powers are large over this energy range and suitable for use as a secondary polarization standard. The use of rapid spin flip on the polarized ion source appreciably reduced experimental errors.