Production of PolarizedH−orD−Ions by a Colliding-Beam Method

Abstract

An experiment is described which shows that a 3-μA beam of polarized ${\mathrm{H}}^{-}$ of ${\mathrm{D}}^{-}$ ions can be produced by bombarding polarized thermal hydrogen atoms with a beam of 40-keV cesium atoms. The observed beam polarization is consistent with the assumption that there is no depolarization in the collision ${\left({\mathrm{H}}^0\right)}_{\mathrm{pol}}$ + ${\mathrm{Cs}}^0$ → ${\left({\mathrm{H}}^{-}\right)}_{\mathrm{pol}}$ + ${\mathrm{Cs}}^{+}$. The emittance of the beam is sufficiently small for good transmission through tandem accelerators.