Beam profile and beam time structure monitors for the extracted beams from the GANIL cyclotrons

International audienc

Injector Diagnostics Overview of SPIRAL2 Accelerator

International audienceThe SPIRAL2 project is based on a multi-beam driver in order to allow both ISOL and low-energy in-flight techniques to produce Radioactive Ion beams (RIB). A superconducting light/heavy-ion linac capable of accelerating 5 mA deuterons up to 40 MeV and 1 mA ions up to 14.5 MeV/u is used to bombard both thick and thin targets. These beams could be used for the production of intense RIB by several reaction mechanisms (fusion, fission, transfer, etc.). The post acceleration of RIB in the SPIRAL2 project is assured by the existing CIME cyclotron. SPIRAL2 beams, both before and after acceleration, can be used in the present experimental area of GANIL. The construction phase of SPIRAL2 is being started since the 1st of July 2005. An injector design overview is presented with diagnostics used to tune and qualify beams

SPIRAL 2 injector diagnostics

International audienceThe future SPIRAL2 facility will be composed of a multi-beam driver accelerator (5 mA/40 MeV deuterons, 5 mA /14.5 MeV/u heavy ions) and a dedicated building for the production of radioactive ion beams (RIBs). RIBs will be accelerated by the existing cyclotron CIME for the post acceleration and sent to GANIL's experimental areas. The injector constituted by an ion source a deuteron/proton source a L.E.B.T. and a M.E.B.T. lines and a room temperature R.F.Q. will produces, transports and accelerates beams up to an energy of 0.75 MeV/u. An Intermediate Test Bench (B.T.I.) is being built to commission the SPIRAL2 injector through the first rebuncher of the M.E.B.T. line in a first step and the last rebuncher in a second step. The B.T.I. is designed to perform a wide variety of measurements and functions and to go more deeply in the understanding of the behaviour of diagnostics under high average intensity beam operations. A superconducting LINAC equipped with two types of cavity will allow reaching 20 MeV/u for deuterons beam. This paper describes injector diagnostic developments and gives information about the current status

A noninterceptive heavy ion beam profile monitor based on residual gas ionization

At GANIL we have developed a beam profile monitor based on ionization of the residual gas of the beam transport lines under the impact of high energy heavy ion beams. The charged ions of the residual gas drift by means of an electrostatic field onto a microchannel plate (MCP), which yields'signals collected on a multistrip anode, providing the spatial distribution of the beam. Calculations and results are presented as well as discussions about the different parameters of the device

Injector Diagnostics Overview of SPIRAL2 Accelerator

International audienceThe SPIRAL2 project is based on a multi-beam driver in order to allow both ISOL and low-energy in-flight techniques to produce Radioactive Ion beams (RIB). A superconducting light/heavy-ion linac capable of accelerating 5 mA deuterons up to 40 MeV and 1 mA ions up to 14.5 MeV/u is used to bombard both thick and thin targets. These beams could be used for the production of intense RIB by several reaction mechanisms (fusion, fission, transfer, etc.). The post acceleration of RIB in the SPIRAL2 project is assured by the existing CIME cyclotron. SPIRAL2 beams, both before and after acceleration, can be used in the present experimental area of GANIL. The construction phase of SPIRAL2 is being started since the 1st of July 2005. An injector design overview is presented with diagnostics used to tune and qualify beams

Mechanical Engineering Design and Simulation for SPIRAL2 Accelerator @GANIL

International audienceThe SPIRAL2 project at GANIL is based on a superconducting ion continuous wave LINAC with two associated experimental areas named S3 (Super Separator Spectrometer) and NFS (Neutron For Science). This paper will report the main contributions of Mechanical Design Group at GANIL to the project. Mechanical engineers have been highly involved since 2005 from the pre-design of the accelerator and its development until present to finalize the installation. During the development phase, design and numerical simulation were used throughout the complete process: from the ion sources, to the LINAC accelerator, then through beam transport lines to experimental halls equipped with detectors. The entire installation (process, buildings and systems) is integrated in 3D CAD models. The paper focuses on three equipments designed in collaboration with electronics engineers and physicists : the Rebuncher in Mean Energy Beam Transport line; the Instrumentation Profiler SEM and the Target Chamber in S3. SPIRAL2 also has to meet safety requirements, such as seismic hazard, therefore the dynamic simulations performed to demonstrate the mechanical strength in case of earthquake will also be detailed

Recent developments for high intensity beams at GANIL

In December 2001, a 5 kW beam was accelerated for the first time at GANIL. This performance was achieved after the increase of SSC2 dee voltage from 170 kV to 200 kV. Moreover, several technical developments have been done, to improve the operation with high intensity beams, and a new electrostatic deflector is under construction in order to reduce losses and activation at the exit of SSC2. This paper presents an overview of these works and the main results on the last accelerated beams