This facility consists of a main instrument with a cryogenic double electrostatic ion storage ring with one common ion-beams merging section and a stand alone beam line for single pass experiments. Positive and negative ions of atoms, molecules and clusters may be internally cooled through trapping and storing.

Research at the DESIREE storage rings may include:

  • Studies of mutual neutralisation reactions in collisions between positive and negative ions at tunable center-of-mass energies ranging from a few meV and up to the keV region. Experiments with light (atomic) and heavy (molecular/cluster) ions are possible. Complex ions may be internally cooled.
  • Action spectroscopy – pulsed laser photoabsorption spectroscopy with internally cooled, stored, complex molecular ions.
  • Spectroscopy and metastable state lifetime measurements for atomic cations applying cw optical pumping techniques.
  • Studies of unimolecular decay, stabilities and lifetimes of multiply charged negative and positive ions. As the rings may be operated at low temperatures it is possible to study stabilities of, and reactions with, negative ions, anions, which would be photodetached by blackbody radiation at normal room temperatures.
  • Studies of biomolecular ions, their stabilities and sensitivities to various heating and ionization processes and their bond-forming processes.

Research at the DESIREE facility's Ion Source Laboratory may include:

  • Fragmentation studies of complex molecular ions in collision with noble gas targets.
  • Fragmentation studies of cold complex molecular ions after optical excitation.

It is our ambition to offer beam time to external users when the facility is fully operational. Until this is organized please contact us via one of the links below if you are a professional researcher and want to propose a joint experiment at the DESIREE facility.

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