TUYCH03
MPI-K, Heidelberg, Germany
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TUYCH03 |
Stored Low-Energy Ion Beams and Electron Cooling at eV Energies | |
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| Molecular ion beams are applied for studies of basic quantum dynamics in molecules and clusters and for investigating molecular processes important in astrophysical and terrestrial low-temperature plasmas. In the 1.5-m magnetic storage ring TSR, molecular ions of masses up to ~40 were stored at energies below 3 MeV. Here, efficient electron cooling was performed with low-energy electron beams from a photocathode at laboratory electron energies of, e.g., 54 eV for CF+ and 34 eV for D2Cl+ and the beams were used for studying cross sections, product branching ratios and product momenta for dissociative recombination at collision energies down to ~1 meV (10 K thermal energy). For further studies of this type a cryogenic low-energy electrostatic storage ring (CSR) operated at 10 K, is under construction at MPIK in Heidelberg. The ring represents a bridge between cooler storage rings and electrostatic trapping devices and follows new approaches for most of its key parts, from ion creation to fragment imaging with cryogenic detectors. It will incorporate an electron cooling device for 1 eV laboratory energy electron beams. Experimental results and operation at TSR as well as progress toward the CSR will be presented. | ||
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Slides TUYCH03 [43.992 MB] | |