[Show abstract][Hide abstract] ABSTRACT: Light-particles stable high-intensity beams (p, d, 3,4He...) will be available from the Linac driver accelerator of SPIRAL-2. Yields of neutron-deficient isotopes as well as of neutron-rich isotopes (by means of reactions with secondary neutrons) are compared with those presently available at the SPIRAL-1 facility. We explore, for light beams (Z< 16) asked in the 'white book' of SPIRAL-2 1, the production methods taking into account the in-target yield but also the feasibility of making such beams by the ISOL method (considering reaction, target, thermal and release properties). We discuss some of the tests needed and planned. A comparison with the present and potentially attainable yields at SPIRAL-1 is presented.
[Show abstract][Hide abstract] ABSTRACT: In the frame of the SPIRAL II (Système de Production d'Ions Radioactifs Accélérés en Ligne Partie II) project, several developments of stable and radioactive ion production systems have been started up. In parallel, GANIL has the ambition to preserve the existing stable and radioactive beams and also to increase its range by offering new ones. In order to identify the best directions for this development, a new group called GANISOL has been formed. Its preliminary conclusions and the latest developments at GANIL are presented.
The Review of scientific instruments 02/2010; 81(2):02A909. · 1.52 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: SPIRAL2 is the new project under construction at GANIL to produce radioactive ion beams and in particular neutron rich ion beams. For the past 10 yr SPIRAL1 at GANIL has been delivering accelerated radioactive ion beams of gases. Both facilities now need to extend the range of radioactive ion beams produced to condensable elements. For that purpose, a resonant ionization laser ion source, funded by the French Research National Agency, is under development at GANIL, in collaboration with IPN Orsay, University of Mainz (Germany) and TRIUMF, Vancouver (Canada). A description of this project called GISELE (GANIL Ion Source using Electron Laser Excitation) is presented.
The Review of scientific instruments 02/2010; 81(2):02A910. · 1.52 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: A gas-filled segmented linear Paul trap has been installed at the focal plane of the high-resolution separator (HRS) at CERN-ISOLDE.
As well as providing beams with a reduced transverse emittance, this device is also able to accumulate the ions and release
the sample in bunches with a well-defined time structure. This has recently permitted collinear laser spectroscopy with stable
and radioactive bunched beams to be demonstrated at ISOLDE. Surface-ionized 39, 44, 46K and 85Rb beams were accelerated to 30keV, mass separated and injected into the trap for subsequent extraction and delivery to the
laser setup. The ions were neutralized in a charge exchange cell and excited with a co-propagating laser. The small ion beam
emittance allowed focussing in the ion-laser overlap region, which is essential to achieve the best experimental sensitivity.
Fluorescent photons were detected by a photomultiplier tube as a frequency scan was taken. A gate (typically 7-12μs wide)
was set on the photomultiplier signal to accept the fluorescent photons within the time window defined by the bunch. Thus,
using accumulation times of 100ms, the dominant contribution to background due to continuous laser scattering could be reduced
by a factor of up to 4×104 .
European Physical Journal A 01/2009; 42(3):503-507. · 2.04 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: This work has been carried out at GANIL within the ambit of the TARGISOL European collaboration which aims to study the rel-evant variables governing the release of radioactive elements from targets in an ISOL system. This work shows how it has been possible to extract diffusion coefficients for 35 Ar atoms diffusing out of graphite targets from release time measurements by using an analytic description of the release times. The diffusion coefficients and efficiencies are presented and compared with results obtained using a ''con-tinuous" method. Ó 2008 Published by Elsevier B.V. PACS: 29.25.Rm; 66.30.Jt
Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms 07/2008; · 1.27 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: Among the multiple progresses in radioactive ion beam (RIB) manipulation for physics experiments, the beam cooling and bunching in gas-filled RF traps has become a widely used technique. It is particularly well adapted to precision experiments, such as Penning trap mass spectrometry or collinear laser spectroscopy. At ISOLDE, an rf quadrupole cooler and ion buncher (RFQCB) has been designed and developed to deliver radioactive beams of improved quality among most of the on-line experiments. The results of the first off-line tests have shown that high transmission efficiencies could be achieved with different RIBs of alkali metals, as it was expected. During the later tests that are presented here a special care was dedicated to the reproduction of the on-line experimental conditions of ISOLDE, with a wide range of different RIBs. This contribution will present the latest off-line tests.
Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms 01/2008; 266:4502-4504. · 1.27 Impact Factor