[en] A ³He-Cryostat for electron scattering experiments at the ELAN-Experiment of the Bonner-Electronen-Strechter-Anlage (ELSA) is described. ³He gas is liquified in a ⁴He bath which temperature is brought to 2.5K by pumping. The cooling in the heat shield to 100K is done by a ⁴He gas operated refrigerator. To reduce the production of gas bubbled in the target cell by the electron beam the ³He liquid is operated off the vapor-liquid equilibrium. (orig.)

[en] Published in summary form only

[en] A study of deuteron electrodisintergration has been performed as the first experiment at the new Bonn 3.5 GeV electron stretcher and accelerator ELSA. This process was measured at an average four-momentum transfer Q² = 0.122 (GeV/c)² in the invariant hadron mass range of 2.02-2.30 GeV. The outgoing proton was detected in coincidence with the scattered electron at three different adjustments of the spectrometer (Θ^lab_p = 44deg, 56deg, 68deg). The measured differential cross sections show the influence of the excitation of the Δ(1232) resonance in the deuteron. The experimental results are compared to theoretical calculations which include meson exchange currents, final-state interactions and isobar currents. (orig.)

[en] Published in summary form only

[en] Published in summary form only

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

[en] The ratio of neutron and proton yields at quasifree kinematics was measured for the reactions ²H(e,e'n) and ²H(e,e'p) at momentum transfers Q²=0.125, 0.255, 0.417, and 0.605(GeV/c)², detecting the neutron and the proton simultaneously in the same scintillator array. The neutron detection efficiency was measured in situ with the ¹H(γ,π⁺)n reaction. From this the ratio R of ²H(e,e'n) and ²H(e,e'p) cross sections was determined and used to extract the neutron magnetic form factor Gⁿ_M in a model insensitive approach, resulting in an inaccuracy between 2.1% and 3.3% in Gⁿ_M