A linear radiofrequency ion trap for accumulation, bunching, and emittance improvement of radioactive ion beams

F. Herfurth , J. Dilling , A. Kellerbauer , G. Bollen , S. Henry (1) , H.J. Kluge , Emily Lamour , D. Lunney (1) , R.B. Moore , C. Scheidenberger , S. Schwarz , G. Sikler , J. Szerypo

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

An ion beam cooler and buncher has been developed for the manipulation of radioactive ion beams. The gas-filled linear radiofrequency ion trap system is installed at the Penning trap mass spectrometer ISOLTRAP at ISOLDE/CERN. Its purpose is to accumulate the 60-keV continuous ISOLDE ion beam with high efficiency and to convert it into low-energy low-emittance ion pulses. The efficiency was found to exceed 10% in agreement with simulations. A more than 10-fold reduction of the ISOLDE beam emittance can be achieved. The system has been used successfully for first on-line experiments. Its principle, setup and performance will be discussed.

Mots clés: Ion guide; Ion trap; Ion cooling; Ion buncher; On-line mass spectrometry; Radioactive ion beams

Domaines: Instrumentations et Détecteurs [physics.ins-det]

F. Herfurth, J. Dilling, A. Kellerbauer, G. Bollen, S. Henry, et al.. A linear radiofrequency ion trap for accumulation, bunching, and emittance improvement of radioactive ion beams. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2001, 469, pp.254-275. ⟨10.1016/S0168-9002(01)00168-1⟩. ⟨in2p3-00010503⟩