[en] A polarized deuterium target internal to a medium-energy electron storage ring is described in the context of spin-dependent (e,e'd) and (e,e^'p) experiments. Tensor polarized deuterium was produced in an atomic beam source and injected into a storage cell target. A Breit-Rabi polarimeter was used to monitor the injected atomic beam polarization. An electrostatic ion-extraction system and a Wien filter were utilized to measure on-line the atomic fraction of the target gas (71±2%) in the storage cell. A target thickness t≅2.10¹³²H/cm² was achieved. The target tensor polarization was varied from P_zz⁺= 0.49(3) to P_zz^-=-0.89(6) while keeping the vector polarization P_z at zero. The luminosity was ∝2.10³¹ e^-.²H . cm^-2s^-1 at a beam current of 120 mA. The performance was stable over a five-week running period. A large acceptance non-magnetic detector system was used for the electron-proton (deuteron) coincidence measurement. It is demonstrated that these techniques result in low backgrounds due to scattering from species other than the polarized target gas and allow for fast and flexible orientation of the target spin. Specific issues such as interfacing the experiment to the storage ring and monitoring the performance of the target system are discussed in detail. (orig.)

[en] A Reply to the Comment by J. Jourdan, I. Sick, and J. Zhao. copyright 1997 The American Physical Society

[en] The design and the performance of a non-magnetic detector setup for internal target physics at the NIKHEF electron-scattering facility is described. The detector setup, used in the first internal-target experiment at the AmPS ring, measures the spin dependence in the elastic and break-up reaction channels from tensor polarized deuterium. It has been established that the detector setup can operate adequately in an internal target environment at luminosities up to 10³² e^- atoms cm^-2 s^-1. Results and measured resolutions are presented. (orig.)

[en] We report an absolute measurement of the tensor analyzing powers T₂₀ and T₂₂ in elastic electron-deuteron scattering at a momentum transfer of 1.6 fm^-1. The novel approach of this measurement is the use of a tensor polarized ²H target internal to an electron storage ring, with in situ measurement of the polarization of the target gas. Scattered electrons and recoil deuterons were detected in coincidence with two large acceptance nonmagnetic detectors. The techniques demonstrated have broad applicability to further measurements of spin-dependent electron scattering. copyright 1996 The American Physical Society