ELECTRON COOLING OF HEAVY-IONS

The electron cooling device of the Heidelberg cooler storage ring has come into operation and for the first time has cooled ions heavier than protons. These experiments have proven that the cooling force is increasing with the charge of the ion. Cooling in the longitudinal and transverse phase space can increase the phase space density by up to four orders of magnitude. The usefulness of the method to increase the lifetime and the intensity of the stored particles was demonstrated resulting in a number of 3 × 1010 carbon particles which were successfully cooled and stored. © 1990.