The transfer RIB lines to the DESIR facility at GANIL-SPIRAL2

Luc Perrot,Hamda Cherif

doi:10.1051/epjconf/20146611029

Abstract

The new ISOL facility SPIRAL2 is currently being built at GANIL, Caen France. SPIRAL2 will produce a large number of new radioactive ion beams (RIB) at high intensities. The DESIR facility will receive beams from the upgraded SPIRAL1 facility of GANIL (stable beam and target fragmentation), from the S3 Low Energy Branch (fusion-evaporation and deep-inelastic reactions) and from the SPIRAL2 production cave (n-induced fission of 238 U, nucleon transfer and fusion-evaporation reactions). In order to deliver the RIB to the experimental set-ups installed in the DESIR hall, 110 meters of beam line have to be designed, originating from 3 different facilities. This paper will focus on the studies which have been done on these transfer lines: beam optics and errors calculations, quadrupoles, diagnostics and mechanical designs.

Highlights

The new ISOL facility SPIRAL2 is currently being built at GANIL, Caen France
radioactive ion beams (RIB) produced in the fragmentation of high-intensity heavy ions and/or thick targets at the upgraded SPIRAL1 facility will be available at DESIR [4]
We have presented here a short introduction of the SPIRAL2 and DESIR project

Summary

The DESIR facility within the SPIRAL2 project

SPIRAL2 is a major extension project of the GANIL facility in Caen, France dedicated to the production of heavy ion beams at mA intensities and of very exotic nuclides. The SPIRAL2 facility will produce a large number of new radioactive ion beams (RIB) at high intensity. These beams will be produced using a new linear accelerator that will deliver deuterons up to 40MeV at 5mA intensity, protons up to 33MeV at 5mA and ions with A/Q=3 up to 14.5MeV/u at 1mA RIB from the S3 separator spectrometer of SPIRAL2 will be delivered to DESIR through its low energy branch (S3-LEB) They will be produced in fusion-evaporation, transfer and deep-inelastic reactions, and will notably consist in refractory elements. RIB produced in the fragmentation of high-intensity heavy ions and/or thick targets at the upgraded SPIRAL1 facility will be available at DESIR [4]. Experience at other ISOL facilities evidences that ion beams with a high degree of purity are required to push experiments towards the limits of nuclear stability [5, 6, 7]

Beam dynamics along the DESIR transfer lines

Conclusion