The quasielastic p-p scattering in the deuteron has been studied at 145 Mev. Cross sections and asymmetries in a polarized beam have been measured. No deviation has been found from the simple impulse approximation predictions for the asymmetries. For the cross section, deviations of up to a factor of two have been found for cases where the struck particle had a large momentum before collision. It is shown that the extrapolation procedure suggested by Chew and Low can be qualitatively used to relate the results. The use of the extrapolation procedure in other similar cases is discussed.

A carbon target was bombarded with polarized protons of average energy 145 MeV and cross sections and asymmetries were measured for deuterons emerging at angles between 5° and 40° to the incident beam. The asymmetry is small at angles less than 15°, but rises rapidly to become nearly 100% at 40°.

The regenerative deflector system applied to the Harvard synchrocyclotron is described. The theory of LeCouteur has been extended to include the initial radial oscillations, and it is shown, both theoretically and experimentally, that only partial monochromatization of the beam occurs during regeneration. However, it is possible to internally limit the energy width of the regenerated beam at the expense of intensity. The theory is in good accord with experiment. The application of these results to the production of an intense external proton beam and more monoenergetic neutron and polarized proton beams is described.