Fusion-evaporation studies with the Super Separator spectrometer (S³) at Spiral2

¹ Irfu/SPhN, CEA Saclay, 91191 Gif/Yvette Cedex, France
² GANIL 14000 Caen, France
³ Argonne National Laboratory, Argonne, IL, USA
^a Present address: Bucknell University, Lewisburg, PA, USA

Abstract

The Super Separator Spectrometer S³ is a device designed for experiments with the very high intensity stable ion beam of the superconducting linear accelerator of the SPIRAL2 facility. Its Physics goals cover the study of radioactive ions produced by fusion-evaporation reactions, like superheavy elements or neutron deficient nuclei close to the proton drip line, but also neutron rich nuclei produced by multi-nucleon transfer reactions as well as ion-ion atomic interactions. It is composed of a two-step separator, with a momentum achromat followed by a mass spectrometer. Superconducting multipole triplets, combining quadruple, sextuple and octupole fields, allow a combination of high transmission and mass resolution. A specific open multipole has been designed to stop the high beam power at the first momentum dispersive plane. A decay spectroscopy detection set-up or a low energy branch can be coupled to S³ for a wide range of studies.