| Paper |
Title |
Other Keywords |
Page |
| MOP010 |
Massively Parallel Wake Field Computations in Long Accelerator Structures
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simulation, vacuum, diagnostics, electron |
52 |
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- W. F.O. Müller, X. Dong, E. Gjonaj, R. Hampel, M. Kärkkäinen, T. Lau, T. Weiland
TEMF, Darmstadt
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The X-FEL project and the ILC require a high quality beam with ultra short bunches. The knowledge of the short-range wakefields in the TESLA cavities and the collimators is needed to predict the beam quality in terms of the single bunch energy spread and emittance. Especially for the high energy collimators these calculations are limited by numerical dispersion. Earlier we presented wake field calculations for short bunches in long structures for rotationally symmetric components with the code ECHO. Now we present first results from our new wake field code in fully 3D. To calculate the effect of the longitudinal and transverse wakefields we have used the time domain numerical approach. For sufficient resolution of the geometric boundaries and the short bunches (down to the nm-range), huge computational resources are needed. Thus in 3D massive parallelisation of the code is necessary. In addition we used the technique of a moving grid, which gives access also to very long structures, i.e. a complete module of eight TESLA cells or a high energy collimator.
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| MOP048 |
Installation of the French High-Intensity Proton Injector at Saclay
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rfq, diagnostics, proton, linac |
153 |
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- P.-Y. Beauvais, R. Duperrier, R. Gobin
CEA, Gif-sur-Yvette
- P. Ausset
IPN, Orsay
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The installation of the French high intensity injector “IPHI” is in progress on the Saclay site. The proton source, RF power system, cooling plant, diagnostics line as well as shielding are now in place. The first sections of the RFQ cavity are installed on their supports. Commissioning is planned during the first half of 2007. At the beginning of 2008, a beam chopper, developed at Cern, will be inserted between the RFQ and the diagnostics line and tested with a proton beam. At the end of 2008, part of IPHI will be moved from Saclay to Cern. New tests, intended for the LINAC4 project, will be carried out using a negative hydrogen beam. This paper describes the fabrication and assembly operations. The future of IPHI at Cern is evoked.
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