Paper |
Title |
Page |
MOODB01 |
Dynamics of the IFMIF Very High-intensity Beam |
53 |
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- P.A.P. Nghiem, R.D. Duperrier, A. Mosnier, D. Uriot
CEA/DSM/IRFU, France
- N. Chauvin, O. Delferrière, W. Simeoni
CEA/IRFU, Gif-sur-Yvette, France
- M. Comunian
INFN/LNL, Legnaro (PD), Italy
- C. Oliver
CIEMAT, Madrid, Spain
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For the purpose of material studies for future nuclear fusion reactors, the IFMIF deuteron beams present a simultaneous combination of unprecedentedly high intensity (2x125 mA CW), power (2x5 MW) and space charge. Special considerations and new concepts have been developed in order to overcome these challenges. The global strategy for beam dynamics design in the 40 MeV IFMIF accelerators is presented, stressing on the control of micro-losses, and the possibility of on-line fine tuning. The obtained results are then analysed in terms of beam halo and emittance growth.
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Slides MOODB01 [3.807 MB]
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MOPC089 |
RF Simulations for the QWR Cavities of PIAVE-ALPI |
283 |
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- M. Comunian, F. Grespan, A. Palmieri
INFN/LNL, Legnaro (PD), Italy
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The PIAVE-ALPI linac is composed of several families of QWR cavities. In order to have a thorough description of the accelerator in terms of beam dynamics, a detailed field mapping of the accelerating cavities is necessary, including non-linear behavior of the off-axis fields, as well as the steering and dispersion effects due to transverse components. For such a purpose, a set of RF simulation was accomplished, with the codes HFSS and COMSOL. The details about these simulations and the main outcomes and results will be described in this article.
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MOPS026 |
Start-to-end Beam Dynamics Simulations for the Prototype Accelerator of the IFMIF/EVEDA Project |
655 |
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- N. Chauvin
CEA/IRFU, Gif-sur-Yvette, France
- M. Comunian
INFN/LNL, Legnaro (PD), Italy
- O. Delferrière, R.D. Duperrier, R. Gobin, A. Mosnier, P.A.P. Nghiem, D. Uriot
CEA/DSM/IRFU, France
- C. Oliver
CIEMAT, Madrid, Spain
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The EVEDA (Engineering Validation and Engineering Design Activities) phase of the IFMIF (International Fusion Materials Irradiation Facility) project consists in building, testing and operating a 125 mA/9 MeV prototype accelerator in Rokkasho-Mura (Japan). Because of high beam intensity and power, the different sections of the accelerator (injector, RFQ, MEBT, Superconducting Radio-Frequency linac and HEBT) have been optimized with the twofold objective of minimizing losses along the machine and keeping a good beam quality. Extensive start-to-end multi-particles simulations have been performed to validate the prototype accelerator design. A Monte Carlo error analysis has been carried out to study the effects of misalignments and field variations. In this paper, the results of theses beam dynamics simulations, in terms of beam emittance, halo formation and beam losses, are presented.
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MOPS031 |
Beam Dynamics Redesign of IFMIF-EVEDA RFQ for a Larger Input Beam Acceptance |
670 |
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- M. Comunian, A. Pisent
INFN/LNL, Legnaro (PD), Italy
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For the IFMIF-EVEDA RFQ, a very challenging project of a deuteron CW RFQ at 175 MHz from 0.1 MeV to 5 MeV with 125 mA of current, the input beam characteristics are very important. A lower focusing force in the first part of the RFQ as beam implemented in order to reduce the requirements of the input beam. In the article a full description of the new design will be reported with the changes in the RFQ performances.
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WEPC014 |
Beam Dynamics Simulations of the PIAVE-ALPI Linac |
2034 |
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- M. Comunian, E. Fagotti, F. Grespan, A. Palmieri, A. Pisent, C. Roncolato
INFN/LNL, Legnaro (PD), Italy
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At the Legnaro National Laboratories it is operating a SuperConducting linac for nuclear studies. The ALPI linac is injected either by a XTU tandem, up to 14 MV, or by the s-c PIAVE injector, made with 2 SC-RFQ. The main part of the linac (at the present 64 cavities for a total voltage up to 48 MV) is build up in two branches connected by an achromatic and isochronous U-bend. The PIAVE-ALPI complex is able to accelerate beams up to A/q = 7. The layout of the linac ALPI is, from the point of beam dynamics, quite complex due the presence of RFQs, cavities, dipoles, magnets, etc. These elements behaviors are entirely not linear, so a small change on the settings can induce a big change in the Linac beam dynamics. An automatic tuning procedure and a full field maps description are mandatory to handle a so high number of active components. The program used at this scope is TraceWin that is able to do an envelope simulation and a full multiparticles simulation.
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