MOPPM1R2
MPI-K, Heidelberg, Germany
The Cryogenic Storage Ring (CSR) in Heidelberg incorporates a merged electron beam for electron-ion collision experiments and for electron cooling. In the CSR electrostatic lattice, ions at energies up to 300 keV per charge unit can be stored for hundreds of seconds and in the radiation field of only few kelvins molecular ions can deexcite to their ro-vibrational ground state. Correspondingly, electron cooling of molecular ions requires laboratory-frame electron energies of only few eV. In the talk various challenges of low-energy electron cooling will be discussed and the results on electron cooling at CSR down to Ecool ~ 4 eV will be presented. Furthermore, other electron-ion collision experiments at CSR will be briefly reviewed
