Integration of RILIS @ SPIRAL2 TISS

International audienc

Laser ion source development status at GANIL

International audienc

Developing TI: Sa laser system for REGLIS

International audienceSPIRAL2 (Système de Production d’Ions Radioactifs Accélérés en Ligne) is a research facility under construction at GANIL(Grand Accélérateur National d’Ions Lourds) for the production of radioactive ion beams by isotope separation on-line methodsand low-energy in-flight techniques. REGLIS3 (Rare Element in Gas Laser Ion source and Spectroscopy) at S3 will be the newdevice which is also under construction at GANIL for producing RIBs (Radioactive Ion Beams) and for studying the ground stateproperties of the nuclei at low energy beam. The Ti: Sa laser cavities existing now at the GISELE (GANIL Ion Source usingElectron Laser Excitation) setup are going to be developed in order to adapt them for the requirements of REGLIS3. A fulldescription of REGLIS3 is presented, RILIS technique which was developed at the last century is also discussed, developing theTi: Sa laser cavities is presented also that is essential for the usage of automatic scan of wavelength instead of the manual one

Optimization of a hot-cavity type resonant ionization laser ion source

TuePS05International audienceResonant Ionization Laser Ion Source (RILIS) is nowadays an important technique in many RadioactiveIon Beam (RIB) facilities for its reliability and ability to ionize efficiently and element selectively.Grand Accélérateur National d’Ions Lourds (GANIL) Ion Source using Electron Laser Excitation(GISELE) is an off-line test bench for RILIS developed to study a fully operational resonant laserion source at GANIL facility. The ion source body has been designed as a modular system toinvestigate different experimental approaches by varying the design parameters, to develop the futureon-line laser ion source. The aim of this project is to determine the best technical solution whichcombines high selectivity and ionization efficiency with small ion beam emittance and stable longterm operation. Latest results concerning emittance and time profile development as a functionof the temperature for different ion source versions will be presented

Progress of resonant ionization laser ion source development at GANIL

International audienc

Optimization of critical-density gas jet targets for laser ion acceleration in the collisionless shockwave acceleration regime

Laser ion acceleration induced by high-power laser systems is nowadays an important research subject due to the large potential range of applications it could satisfy. Most of the available high-power laser facilities deliver only a few laser pulses per hour. The new facilities under development will operate at higher repetition rates (up to 10 Hz). Conventional target technologies (solid targets) and acceleration mechanisms (Target Normal Sheath Acceleration – TNSA) used so far in laser-based ion acceleration are difficult to implement at high repetition rate. New ion acceleration mechanisms such as Collisionless Shockwave Acceleration (CSA) using high density gas jets represent therefore a promising alternative. Dense gas jet targets show several advantages such as constant refresh and negligible debris production. However, full comprehension of the fluid dynamics involved in the gas jet target production is fundamental for its optimization, and at present precise data is scarce. An ongoing study of design and optimization of supersonic gas jet nozzles for laser-based ion acceleration is presented

Development of gas jet targets for laser-plasma experiments at near-critical density

Computational fluid dynamics simulations are performed to design gas nozzles, associated with a 1000 bars backing pressure system, capable of generating supersonic gas jet targets with densities close to the critical density for 1053 nm laser radiation (1021 cm−3). Such targets should be suitable for laser-driven ion acceleration at a high repetition rate. The simulation results are compared to the density profiles measured by interferometry, and characterization of the gas jet dynamics is performed using strioscopy. Proton beams with maximum energies up to 2 MeV have been produced from diatomic hydrogen gas jet targets in a first experiment

Hot-cavity studies for the Resonance Ionization Laser Ion Source

International audienceThe Resonance Ionization Laser Ion Source (RILIS) has emerged as an important technique in many Radioactive Ion Beam (RIB) facilities for its reliability, and ability to ionize target elements efficiently and element selectively. GISELE is an off-line RILIS test bench to study the implementation of an on-line laser ion source at the GANIL separator facility. The aim of this project is to determine the best technical solution which combines high selectivity and ionization efficiency with small ion beam emittance and stable long term operation. The ion source geometry was tested in several configurations in order to find a solution with optimal ionization efficiency and beam emittance. Furthermore, a low work function material was tested to reduce the contaminants and molecular sidebands generated inside the ion source. First results with ZrC ionizer tubes will be presented. Furthermore, a method to measure the energy distribution of the ion beam as a function of the time of flight will be discussed

Development of target ion source systems for radioactive beams at GANIL

International audienceThe GANIL facility (Caen, France) is dedicated to the acceleration of heavy ion beams including radioactive beams produced by the Isotope Separation On-Line (ISOL) method at the SPIRAL1 facility. To extend the range of radioactive ion beams available at GANIL, using the ISOL method two projects are underway: SPIRAL1 upgrade and the construction of SPIRAL2. For SPIRAL1, a new target ion source system (TISS) using the VADIS FEBIAD ion source coupled to the SPIRAL1 carbon target will be tested on-line by the end of 2013 and installed in the cave of SPIRAL1 for operation in 2015. The SPIRAL2 project is under construction and is being design for using different production methods as fission, fusion or spallation reactions to cover a large area of the chart of nuclei. It will produce among others neutron rich beams obtained by the fission of uranium induced by fast neutrons. The production target made from uranium carbide and heated at 2000 °C will be associated with several types of ion sources. Developments currently in progress at GANIL for each of these projects are presented