Electron cooling at CRYRING

Abstract

The design of the CRYRING electron cooler, including magnets, electron gun and collector, and the vacuum system, is described. Light and heavy atomic ions and molecular ions have been cooled at ion energies between 0.29 and 10.9 MeV per nucleon. Experiments in atomic and molecular physics have been performed using the cooler both for beam cooling and as an electron target. Measurements of longitudinal drag forces and resulting estimates of transverse and longitudinal electron temperature are presented.