101 research outputs found
A European Advanced Technology Programme for ADS Accelerator Development
Consecutive to the work of the European Technical Working Group on ADS, the Preliminary Design Study of an Experimental ADS was launched in 2001 as a 5th Framework Program EC project. A special working package was dedicated to the accelerator design, and in particular taking into account that the issue of âbeam tripsâ could be a potential âshow-stopperâ for ADS technology in general. A reference solution, based on a linear superconducting accelerator with its associated doubly achromatic beam line has been worked out up to some detail. For very high reliability, the proposed design is intrinsically fault tolerant, relying especially on highly modular âde-ratedâ components associated to a fast digital feedback system. A programme for the remaining R&D, focused on experimental reliability demonstration of prototypical components, has been elaborated. This R&D will be performed in the 6th Framework Program EC project EUROTRANS, which presently is just starting
Code Benchmarking of Higher Order Modes Simulation Codes
In order to compare simulation results performed with different codes a simulation test bench is defined and four different codes are compared with each other to validate their compatibility
Flat beams and application to the mass separation of radioactive beams
JaCoW web site http://accelconf.web.cern.ch/AccelConf/e06The notion of flat beam is now well established and has been proven theoretically and experimentally with applications for linear colliders. In this paper, we propose a new and simple demonstration of the "flat beam theorem", and a possible application in the frame of radioactive ion beams (RIB) production. It consists in using a magnetized multi-specie heavy ion beam extracted from a high frequency ECR source, decoupling the transverse phase planes in such a way to obtain a very small emittance in the horizontal one, and using a dipole to separate the isotopes. A design of such a transport and separation line will be proposed and commented
Beam Dynamics Studies for the Spiral-2 Project
JACoW web site http://accelconf.web.cern.ch/AccelConf/e06The SPIRAL-2 superconducting linac driver, which aims to deliver 5 mA, 20 A.MeV deuterons and 1 mA, 14.5 A.MeV q/A=1/3 heavy ions, is now entering the construction phase. It is composed of an injector composed of two ECR sources entering a 88 MHz RFQ, followed by a superconducting section based on independently phased quarter-wave cavities with warm focusing. This paper presents the status of the beam dynamics studies recently performed during this construction phase: consolidation and freezing of the linac design, update of the mass separation system or analysis of the proton capability
A reference accelerator scheme for ADS applications
Accelerator Driven Systems (ADS) for transmutation of nuclear waste typically require 350 MeVâ1 GeV accelerators delivering proton fluxes of 5â10 mA for demonstrators, and 20â50 mA for large industrial systems. Thus, such machines belong to the category of the so-called HPPA (High-Power Proton Accelerators), with multi-megawatt beam power. HPPA are presently developed and constructed at great pace for their broad utility in fundamental or applied science. Compared to other HPPA, many features and requirements are similar for the ADS driver. However, there is a need for exceptional reliability: because of the induced thermal stress to the sub-critical core, the number of unwanted âbeam-tripsâ should not exceed a few per year, a requirement that is several orders of magnitude above usual performance. Consecutive to the work of the European Technical Working Group (ETWG) on ADS, the Preliminary Design Study of an Experimental ADS (PDS-XADS) was launched in 2001 as a 5th Framework Program EC project.1 A special Working Package (WP3) was dedicated to the accelerator design, taking especially into account that the issue of âbeam-tripsâ could be a potential âshow-stopperâ for ADS technology in general. A reference solution, based on a linear superconducting accelerator with its associated doubly achromatic beam line, has been worked out to some detail. For high reliability, the proposed design is intrinsically fault tolerant, relying on highly modular âde-ratedâ components associated to a fast digital feedback system. The proposed solution also appears to be robust concerning operational aspects like maintenance and radioprotection. A roadmap for construction as well as the required consolidated budget was elaborated. A program for the remaining R&D, focused on experimental reliability demonstration of prototypical components has been elaborated. This R&D will be performed in the 6th Framework Program EC project EUROTRANS,2 which presently is just starting
Study of a spoke cavity for low-beta applications
Abstract Since a few years, intensive studies have been developed on SC cavities (for instance, spoke-type or reentrant cavities) for their use as accelerating structures in the low energy part of high power proton or ions accelerators (typically from 5 to 100 MeV). Within the framework of the EURISOL (EURopean Isotope Separation On-Line) & XADS (eXperimental Accelerator Driven System) European accelerators projects, IPN Orsay decided to plan a R&D program on low-beta spoke-type cavities. In the major part of this paper, we report on the optimization of the geometry of a ÎČ=0.35, 2 gap spoke cavity, aiming at achieving good electromagnetic parameters (i.e. lowest E pk /E acc and B pk /E acc ). A mechanical study is also presented, as well as a preliminary design of a proton spoke Linac (12-85 MeV) composed of ÎČ=0.18 and ÎČ=0.35, 2 gap cavities
Design of the Prototypical Cryomodule for the EUROTRANS Superconducting Linac for Nuclear Waste Transmutation
International audienceOne task of the accelerator workpackage of the EUROTRANS program for the design of a nuclear waste transmutation system is dedicated to the engineering and realization of a prototype cryomodule of the high energy section of the linac, equipped with elliptical superconducting niobium cavities. We review here the present status of the design and the planned program that foresees the experimental characterization of the fully equipped cavity and RF system under its nominal operating conditions
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Thorium Energy Futures
The potential for thorium as an alternative or supplement to uranium in fission power generation has long been recognised, and several reactors, of various types, have already operated using thorium-based fuels. Accelerator Driven Subcritical (ADS) systems have benefits and drawbacks when compared to conventional critical thorium reactors, for both solid and molten salt fuels. None of the four options â liquid or solid, with or without an accelerator â can yet be rated as better or worse than the other three, given today's knowledge. We outline the research that will be necessary to lead to an informed choice
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