Deceleration and cooling of heavy ion beams: The COLETTE project

M. Sewtz (1) , C. Bachelet (1) , N. Chauvin (1) , C. Guénaut (1) , E. Leccia (1) , D. Le Du (1) , D. Lunney (1)

1 CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse

An ion beam cooler has been constructed to adapt the ISOLDE rare isotope beam emittance to the acceptance of the mass spectrometer MISTRAL, CERN. In a test experiment a Na$^+$-beam was extracted out of the gas filled, linear Paul Trap with an emittance of 8$\pi$ mm mrad at 6 keV. Near 100\% transmission through a new electrostatic deceleration system was measured for a 30 keV He$^+$-beam which was decelerated to a final energy of 10 eV. A method to determine the longitudinal energy spread of the decelerated beam as function of its initial emittance is discussed.

Mots clés: Linear Paul Trap; Radiofrequency quadrupole; Buffer gas cooling; Rare ion beam

Domaines: Physique Nucléaire Expérimentale [nucl-ex]

M. Sewtz, C. Bachelet, N. Chauvin, C. Guénaut, E. Leccia, et al.. Deceleration and cooling of heavy ion beams: The COLETTE project. Eighth European Conference on Accelerators in Applied Research and Technology (ECAART-8), Sep 2004, Paris, France. pp.55-60, ⟨10.1016/j.nimb.2005.06.088⟩. ⟨in2p3-00024481⟩