RADIATIVE POLARIZATION: OBTAINING, CONTROL, USING

Abstract

This paper is dedicated to the memory of our teacher, Gersh Budker Theoretical and experimental studies in the Institute (Novosibirsk) on the behavior of particle polarization in storage rings are reviewed.In theoretical works the motion of particle spins hi arbitrary inhomogeneous fields was investigated.Methods are described for obtaining beams with a required polarization direction in storage rings and accelerators.It is shown that variable-direction fields in some parts of the orbit may be used to avoid resonance depolarization during acceleration of polarized particles to high energies.The conditions for the existence of radiative polarization of electrons and positrons are discussed.Methods for measuring the polarization of the single and colliding beams are described.The results of measuring the time and degree of radiative polarization are presented.The action of spin resonances was studied.The use of polarized beams to measure the absolute energy of particles in a storage ring and to compare precisely the anomalous magnetic momenta of electrons and positrons is described.