Publications: Conference

Author(s) :Y. Blumenfeld

Invited talk at International ymposium on Exotic Nuclei, EXON 2009, Sochi, Russia, Sept 28-Oct 2, 2009

Author(s) :F. SCarpa, D. Zenere, A. Facco (INFN-LNL)

This article reports on the development of the solid state RF amplifier at 352 MHz at Legnaro.

Author(s) :S. Bousson, J.L. Biarrotte, J.M. Dufour, N. Gandolfo, T. Junquera, J. Lesrel, L. Lukovac, F. Lutton, G. Martinet, G. Olry, A. Ponton, E. Rampnoux, H. Saugnac, P. Szott.

An article reporting on the latest developments on spoke cavities for the Eurisol driver

Author(s) :J.-C. David, S. P. Chabod, D. Doré, D. Ene, B. Rapp, D. Ridikas, N. Thiollière

International Topical Meeting on Nuclear Research Applications and Utilization of Accelerators 4-8 May 2009 in Vienna, Austria - Organized by the International Atomic Energy Agency In cooperation with the American Nuclear Society

Author(s) :D. Ene, J.-C. David, D. Doré, D. Ridikas

International Topical Meeting on Nuclear Research Applications and Utilization of Accelerators - 4-8 May 2009 in Vienna, Austria. Organized by the International Atomic Energy Agency In cooperation with the American Nuclear Society

Author(s) :C. Kharoua(1), Y. Kadi(1), L. Blumenfeld(1), W Wagner(2), K. Thomsen(2), R. Milenkovich(2), S. Dementjevs(2), E. Platacis(3), K. Kravalis(3), A. Zik(3) (1)CERN (European Laboratory for Particle Physics),CERN CH - 1211 Geneva 23, Switzerland (2)PSI(Paul Scherrer Institute); Paul Scherrer Institute , 5232 Villigen PSI, Switzerland (3)IPUL (Institute of Physics of University of Latvia); 32 Miera iela, Salaspils, LV-2169 Latvia

The European Isotope Separation On-Line Radioactive Ion Beam Facility (EURISOL) is set to be the ‘next-generation’ European Isotope Separation On-Line (ISOL) Radioactive Ion Beam (RIB) facility. It will extend and amplify current research in nuclear physics, nuclear astrophysics and fundamental interactions beyond the year 2013. In EURISOL, four target stations are foreseen, three direct targets of approximately 100 kW of beam power and one multi-MW liquid metal proton-to-neutron converter, all driven by a high-power particle accelerator. In the aforementioned multi-MW target assembly, high-intensity RIBs of neutron-rich isotopes will be obtained by inducing fission in several actinide targets surrounding a liquid metal spallation neutron source. This presentation summarises the work carried out for the Multi Megawatt target station of the EURISOL Design Study with particular attention to the coupled neutronic of the liquid converter and the overall performance of the facility, which will sustain fast neutron fluxes of the order of 1014 n/cm2/s. The production of radionuclides in the actinide targets as well as in the liquid metal are also evaluated, showing that the targeted 1015 fissions/s can be achieved. Some of the greatest challenges in the design are the high power densities, entailing large structural stresses, and the heat removal, requiring detailed thermo-hydraulics calculations. Some result of a validation experiment of the Coaxial Guided Stream Design will be presented. Alternatively, a windowless target configuration has been proposed, based on a liquid mercury transverse film design. With this design, higher power densities and fission rates may be achieved, also avoiding the technical issues related to the beam window. Acknowledgements I acknowledge the financial support of the European Commission under the 6th Framework Programme “Research Infrastructure Action Structuring the European Research Area” EURISOL DS Project Contract no. 515768 RIDS. The EC is not liable for any use that may be made of the information contained herein.

Author(s) :D. Ene, J.-C. David, D. Doré, B. Rapp, D. Ridikas

First International Workshop on Accelerator Radiation Induced Activation (ARIA'08) October 13-17, 2008 - PSI

Author(s) :D. Ridikas (1) for Task 5 & A. Herrera-Martínez (2) for Task 2 of the EURISOL DS project (1) CEA Saclay, DSM/DAPNIA, 91191 Gif-sur-Yvette, France (2) CERN, CH-1211 Geneva 23, Switzerland

The European Community has launched the design study for a next generation RIB facility able to increase by a few orders of magnitude, the exotic beam intensity and availability in Europe. Forty institutes and laboratories within Europe, North America and Asia are taking part in this consortium, named EURISOL DS project (European Isotope Separation On Line Design Study). In EURISOL, four target stations are foreseen, three direct targets of approximately 100 kW of beam power and one multi-MW (MMW) target assembly, all driven by a high-power particle accelerator. In this MMW station, high-intensity RIBs of neutron-rich isotopes will be obtained by inducing fission in several actinide targets surrounding a liquid metal spallation neutron source. The envisaged increase in RIB intensities at EURISOL means a drastic increase of the radioactive inventory and corresponding radioprotection related issues. Safety aspects of the future RIB production targets (aiming at a few ~1015 fissions/s) will become decisive in limiting the beam intensities, in selecting the production method and materials, and in the final cost of the facility. New technical challenges arise that will in most cases also critically affect the safety approval procedures. The handling and disposal of open radioactive high intensity RIB production targets (e.g. UCx, ThCx) including liquid Hg converter target is yet unexplored. Equally, containment of gaseous radioactivity and its migration will be crucial in the same context. The progress made so far on most of these issues within Task 2 “multi-MW target” and Task 5 “Safety and Radioprotection” will be summarized.

Author(s) :C. Kharoua

This presentation will present some of the greatest challenges in the design of this high power spallation sources with a special attention on the high power densities, entailing large structural stresses, and the heat removal, requiring detailed thermo-hydraulics calculations. Alternatively, a windowless target configuration has been proposed, based on a liquid mercury transverse film design. With this design, higher power densities and fission rates may be achieved, also avoiding the technical issues related to the beam window. In the second part of this presentation a brief summary of the actinide targets will be presented. The thermal simulations as well as the fission rates and isotopes production simulation are important calculation to evaluate the capability of the Multi-Megawatt target station.

Author(s) :C. Kharoua

This presentation summarises the work carried out for the Multi Megawatt target station of the EURISOL Design Study with a special attention to the coupled neutronics of the liquid converter and fission target (MAFF/PIAFE design like) and the overall performance of the facility, which will sustain fast neutron fluxes of the order of 1014 n/cm2/s. The production of radionuclides in the actinide targets as well as in the liquid metal are also evaluated, showing that the targeted 1015 fissions/s can be achieved.