Measurement of the polarization degree of accelerated polarized electrons at the 2.5 GeV synchrotron in Bonn for energies between 0.85 and 2 GeV

Abstract The polarization degree of accelerated longitudinally polarized electrons has been measured employing the spin dependence of the elastic electron-electron cross section. We observe strong depolarization as well as polarization flips in the neighbourhood of imperfection and intrinsic resonances. Measures to maintain the initial polarization degree up to the highest available energies are discussed.