TASK 4 - Fission Target

Author(s) :A. Olivier-Kaiser, F. Le Blanc, C. Lau

The realisation of next-generation ion sources suitable for the EURISOL multi-mega-watt (MMW) target station needs exhaustive studies and developments. An exhaustive review was carried out to evaluate the capability of the ion-sources to operate under the irradiation conditions of the MMW target station. In addition, selectivity must be taken into account to avoid the spread of unwanted radioactivity out of the target-ion-source system (TIS). These studies led to consider RILIS (Resonance Ionization Laser Ion Source) as the reference ion source for this target station.

| Download [ 04-25-2009-0017] ( 476KB )

Author(s) :F. Negoita, L. Serbina, E. Udup, O. Alyakrinskiy, M. Barbui, J. Bermudez, L.B. Tecchio, Y. Kadi, C. Kharoua, Y. Romanets

The report discusses the constraints, solutions and options for integration of the main systems needed to assure the operation and maintenance/exchange of the fission target – ion sources assemblies capable to withstand very high neutron fluxes around EURISOL multi-MW neutron converter, to provide the desired fission rate of 10e15 fis./sec. and to extract with highest possible efficiencies the fission products as radioactive ion beam. Adapting the concepts developed for a single fission target within PIAFE and MAFF projects, simultaneous operation of six fission targets was proposed for EURISOL. A first design following these concepts was presented in a previous report. Here we describe several improvements implemented in the design for a more efficient, more reliable and safer operation. An optimized layout of the part of the EURISOL MMW station related to fission target services and handling is proposed as well.

| Download [ 04-25-2009-0016] ( 1911KB )

Author(s) :J. Bermudez, O. Alyakrinskiy, M. Barbui, F. Negoita, L. Serbina, L.B. Tecchio, E. Udup

A study of a new fission target for EURISOL-DS is presented with a detailed description of the target. Calculations of several configurations were done using Monte Carlo code FLUKA aimed to obtaining 1015 fissions/s on single target. In Eurisol, neutrons inducing the fission reactions are produced by a proton beam 1GeV-4mA interacting with a mercury converter. The target configuration was customized to gain fission yield from the large amount of low energy neutrons produced by the Hg converter. To this purpose, the fissile material is composed by discs of 238-Uranium carbide enriched with 15 g of 235-U. Studies of several geometries were done in order to define the shape and composition of uranium target, taking into account the mechanical and space constraints

| Download [ 04-25-2009-0015] ( 1356KB )

Author(s) :M. Cheikh Mhamed, S. Essabaa, C. Lau

The EURISOL multi-mega-watt target station requires dedicated radioactive ion sources. Notably, they must be capable of operating under extremely hard radiations and with a larger fission target producing over 1014 fissions/s. The realisation of next-generation ion sources suitable for such operating conditions needs exhaustive studies and developments. In order to take up such a challenge, a review on radioactive ion sources was achieved and the investigation on ion source parameters was in particular focused on a plasma ion source through a R&D program.

| Download [ 04-25-2009-0014] ( 721KB )

Author(s) :A. Olivier, F. Le Blanc, C. Lau

The realisation of next-generation ion sources suitable for the EURISOL multi-mega-watt (MMW) target station needs exhaustive studies and developments. An exhaustive review was carried out to evaluate the capability of the ion-sources to operate under the irradiation conditions of the MMW target station. In addition, selectivity must be taken into account to avoid the spread of unwanted radioactivity out of the target-ion-source system (TIS). These studies led to consider RILIS (Resonance Ionization Laser Ion Source) as the reference ion source for this target station.

| Download [ 04-25-2009-0013] ( 475KB )