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Köln 2004 – scientific programme

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HK: Physik der Hadronen und Kerne

HK 12: Poster Session: Instrumentation and Applications

HK 12.27: Poster

Tuesday, March 9, 2004, 13:30–15:30, Foyer

The laser ion source trap LIST for on-line ion production - status and perspectives — •Katja Wies1, Kim Brück1, Christopher Geppert1, Thomas Kessler1, Gerd Passler1, Simone Sirotzki1, Klaus Wendt1, H.-J. Kluge2, Manas Mukherjee2, Klaus Blaum3, and Stefan Schwarz41Institut für Physik, Universität Mainz, 55099 Mainz — 2GSI, 64291 Darmstadt — 3CERN, CH-1211 Geneva 23, Switzerland — 4MSU, East Lansing, USA

At the institute for physics of the university of Mainz an ion source for on-line applications is developed, which combines resonant laser ionization of atoms with a radiofrequency quadrupole ion trap (RFQ). In the setup the atomization and ionization regions are separated by using an ion repelling electrode to prevent unwanted surface ions and to significantly increase the isobaric selectivity. The laser ions are stored in the trap, cooled with buffer gas and are released in a well controlled bunch of low spatial and temporal emittance. Simulation studies are performed on the ionization and trapping conditions, showing high efficiency for the individual processes of trapping, cooling and extraction of the ions. Initial installation and testing of the device is carried out at the Mainz RISIKO mass separator. Source and trap design, the simulation studies and first measurements on laser ionization on stable isotopes will be discussed.

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