The decay of a? hyperon produces a proton whose polarization is correlated with its momentum in the hyperon center of mass. The positive charge of the hyperon allows momentum selection both on it and on the proton. A beam of longitudinally polarized protons can be produced, by backward decays in the center of mass. The? hyperon being neutral, does not allow momentum selection. Transversely polarized protons, produced by the decay of? particles must be identified by tagging hodoscopes at an intermediate focus in the proton beam line. The use of?+ hyperons to produce polarized protons was first suggested by Rafil Rzaev, a visitor to Fermilab from Serpukhov. He was primarily concerned with the existing 200 GeV polarized beam in the Fermilab meson area. Since then interest has been shown in polarized protons by other experimental collaborations. These experiments are at the ends of beam lines in existing tunnels. These tunnels are curved an are well suited to a?+ produced polarized proton beam which has a net band. The expected fluxes and backgrounds for the beam are discussed here. 2 refs.

A high energy polarized proton beam which would utilize lambda decays as a source of polarized protons was proposed. We discuss the operation of such a beam and related physics experiments. 12 references.

This book is devoted to the polarization (spin) physics of high energy particles and contains three parts. The first part presents the theoretical prefaces of polarization in the particle physics for interpretations, predictions and bases for understanding the following two parts. The second part of the book presents the description of the essential polarization experiments including the recent ones. This part is devoted to the innovative instrumentations, gives the parameters of the polarized beams, targets, polarized gas jets and polarimeters. The third part of the book concentrates on the important achievements in polarization physics. The book can be used in lectures on nuclear and particle physics and and nuclear instruments and methods. As supplementary reading this book is useful for researchers working in particle and nuclear physics.