Upgrade Of The Experimental Facilities At Lns

A feasibility study to build an helical orbit spectrometer using the SOLE magnetic field is presented in the more general context of the upgrade project of the LNS facilities. It includes the upgrade of the superconducting cyclotron to deliver high-intensity beams and the design of a new fragment separator optimized to match the beam optics of the secondary beams produced by projectile fragmentation. The main features of a helical-orbit spectrometer together with simulations performed using the SOLE magnetic field are presented and compared to the results obtained using a homogeneous solenoid field. The effects related to the geometry of the detection array and to the beam spot size on the detected impact point distribution and on the recostruction of the emission angle are also discussed.