Beam dynamics studies in SPIRAL II LINAC

ACCInternational audienceThe proposed LINAG driver for the SPIRAL 2 project aims to accelerate a 5-mA D+ beam up to 20 A.MeV and 1-mA beam for q/A=1/3 up to 14.5 A.MeV. It is acontinuous wave regime (cw), designed for maximum efficiency in the transmission of intense beams. It consists of an injector (two ECR sources + a Radio Frequency Quadrupole) followed by a superconducting section based on an array of independently phased cavities. This paper presents beams dynamics studies associated to the LINAG driver. End-to-end simulations (low-energy beam lines, RFQ, medium-energy beam line, SC linac) are shown

High intensity driver accelerators for EURISOL

This paper describes briefly the result of the work done by the Driver Accelerator Task Group of the EURISOL RTD project. Accelerator experts from the laboratories participating in this study, namely CEA-Saclay, CERN, GANIL, INFN-Legnaro, IPN-Orsay, have elaborated different technical solutions during the period 2000-2001, following the recommendations for specifications of the EURISOL Steering committee. The main conclusion of the study is that the EURISOL baseline driver accelerator should be a 1-GeV, 5-MW CW proton facility, with a possible upgrade to 2 GeV. A cheaper "back-up" solution, based on a high-intensity electron driver for photofission, is also discussed

High intensity driver accelerators for EURISOL

This paper describes briefly the result of the work done by the Driver Accelerator Task Group of the EURISOL RTD project. Accelerator experts from the laboratories participating in this study, namely CEA-Saclay, CERN, GANIL, INFN-Legnaro, IPN-Orsay, have elaborated different technical solutions during the period 2000-2001, following the recommendations for specifications of the EURISOL Steering committee. The main conclusion of the study is that the EURISOL baseline driver accelerator should be a 1-GeV, 5-MW CW proton facility, with a possible upgrade to 2 GeV. A cheaper "back-up" solution, based on a high-intensity electron driver for photofission, is also discussed

FIRST A/Q=3 BEAMS OF PHOENIX V2 ON THE HEAVY IONS LOW ENERGY BEAM TRANSPORT LINE OF SPIRAL2

International audienc

20/6/26, Auteuil, Portmore [cheval de course] monté par Biarot [i.e. J. Biarrotte], gagnant du grand steeple : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 110598Appartient à l’ensemble documentaire : Pho20RolImage de press

704 MHz Superconducting Cavities for a high Intensity Proton Accelerator

Abstract The Hybrid program has been recently started in France in order to explore nuclear waste transmutation technology, based on a spallation neutron source driven by a high-intensity proton linear accelerator. The study of the high-energy section of this accelerator (Superconducting Accelerator for Hybrid) has begun : it aims at developing 704 MHz superconducting radiofrequency (SCRF) cavities for the two different beta sections (β=0.47 and β=0.65). A single-cell (β=0.65) SCRF cavity has been designed by CEA Saclay, and built in industry (CERCA). Mechanical stiffness was analyzed at IPN Orsay. The first cryogenic tests have been performed, showing excellent RF performance. The Qo value was as high as 7.10 10 , indicating extremely low RF losses. The accelerating field went up to 26MV/m, exceeding by more than a factor of two the design point of 10 MV/m

The Issue of Accelerator Beam Trips for Efficient ADS Operation

International audienceThe development of accelerator-driven systems(ADSs) is motivated by the potential of these machines toreduce the volume and the radiotoxicity of accumulatednuclear waste, more particularly that of minor actinidescurrently generated by the operation of existing pressurizedwater reactors. The reduction of both volume andradiotoxicity of nuclear waste is achieved by transmutationand fission of minor actinides into less-active isotopesor shorter-lived by-products.Various technical challenges exist regarding designingreliable and efficient ADSs. The key points are verymuch linked to the design of the spallation module, theassurance that reactivity remains below criticality underany circumstances, and the accelerator reliability.This paper addresses the latter two challenges imposedon the accelerator in order to assure safe andreliable ADS operation. It discusses the possibility ofperforming online absolute reactivity measurements andthe limits in the number of allowable accelerator beamtrips, which might impede plant integrity and/or plantefficiency