Low-Energy Deuteron Polarimeter

We built a Low Energy Deuteron Polarimeter (LDP) which measures the spin-polarization of deuteron beams in the energy range of 25 to 80 keV. The LDP works by measuring azimuthal asymmetries in the D(~ d, n)He reaction at θlab = 90 ◦ and comparing them to analyzing powers. We built this polarimeter for two reasons. Firstly, to crosscheck other polarimeters at KVI (LSP and IBP). Secondly to test the LDP itself. We were able to use the LDP as a vector polarimeter, but not as a tensor polarimeter because of an uncertain tensor analyzing power calibration. Figure 1: Cartoon depicting polarization. The top panel represents a polarized beam, where spins are aligned. The bottom panel represents an unpolarized beam, where spins are randomly aligned.