Paper |
Title |
Page |
MOPCH103 |
SPIRAL2 RFQ Prototype First Results
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282 |
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- R. Ferdinand, R. Beunard, V. Desmezières, M. Di Giacomo, P. Robillard
GANIL, Caen
- A.C. Caruso
INFN/LNS, Catania
- S. Cazaux, M. Desmons, A. France, D. Leboeuf, O. Piquet, J.-C. Toussaint
CEA, Gif-sur-Yvette
- M. Fruneau, Y. Gómez-Martínez
LPSC, Grenoble
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The SPIRAL2 RFQ has been designed to accelerate a 5 mA deuteron beam (Q/A=1/2) or a 1 mA particle beam with q/A=1/3 up to 0.75 MeV/A at 88MHz. It is a CW machine which has to show stable operation, provide the required availability and reduce losses to a minimum in order to minimize the activation constraints. Extensive modelisation was done to ensure a good vane position under RF. The prototype of this 4-vane RFQ has been built and tested in INFN-LNS Catania and then in IN2P3-LPSC Grenoble. It allowed us to measure the vacuum quality, the RF field by X-ray measurements, the cavity displacement and the real vane displacement during the RF injection. Different techniques were used, including an innovative and effective CCD measurement with a 0.6 μm precision. This paper outlines the different results.
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THPCH160 |
Theoretical Study and Experimental Result of the RF Coupler Prototypes of Spiral 2
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3170 |
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- Y. Gómez-Martínez, D. Bondoux, JM. Carretta, J.-M. De Conto, M. Fruneau, A. Garrigue, D. Marchand, R. Micoud, E. Vernay, F. Vezzu
LPSC, Grenoble
- P. Balleyguier
CEA, Bruyères-le-Châtel
- M. Di Giacomo
GANIL, Caen
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Spiral 2 is a 40 MeV superconducting linac under construction at GANIL. The RF couplers have to provide a 12 kW CW power to the cavities at 88 MHz. Two solutions corresponding to 2 different technologies have been designed and 2 prototypes have been built. We present the technical proposals and issues as well as the results (manufacturing, test at low and high power, multipacting
) leading to the final choice.
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