PREPARATION OF RELATIVISTIC LI-7(-BEAMS FOR PRECISION EXPERIMENTS AT STORAGE-RINGS() ION)

Heavy ion storage rings allow for tests of the structure of local spac e time via the Doppler effect. At the TSR/Heidelberg an experiment wit h high resolution laser spectroscopy at Li-7(+) is performed. To gain the maximum resolution for saturation spectroscopy new methods of rela tivistic ion beam preparation and diagnostics have been developed. The laser cooling of the beam allows for precision determination of the m ean velocity of the ions. A novel phase synchronous detection scheme, ultimately sensitive to single ions, gives insights into the cooling m echanism and dynamics. With an additional synchronous excitation schem e systematic uncertainties of the test experiment can be drastically r educed. After separation of the ground state ions from the triplet sta tes of Li-7(+) by the combination of laser and electron cooling, a bun ched and cooled ensemble of fast moving high precision clocks with min imized perturbations by space charge effects and intra beam scattering is available.