Abstract
Atomic beam techniques have been used to develop a polarized proton source which has now been installed on the Rutherford Laboratory 50 MeV proton linear accelerator and successfully operator for over 6 months. An accelerated beam with an intensity of 7.5 × 10 7 protons per second and a polarization of 0.32 is obtained. The construction of the source, its installation on the accelerator, and operating experience are discussed. Systematic errors which arise in the conventional method of making asymmetry measurements are reduced because of the ability to change the direction of the beam polarization by reversing the magnetic field across the ionizer in the source. Backgrounds are low, typically 1 part in 1000. The energy resolution is ± 0.15 MeV and the energy of the beam can be readily adjusted. All these factors contributed towards making the source a very powerful additional facility for nuclear physics experiments.
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