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- V.G. Vaccaro, A. D'Elia
Naples University Federico II and INFN, Napoli
- T. Clauser, A.C. Rainò
Bari University, Science Faculty, Bari
- C. De Martinis, D. Giove, M. Mauri
INFN/LASA, Segrate (MI)
- S. Lanzone
CERN, Geneva
- M.R. Masullo
INFN-Napoli, Napoli
- R.J. Rush
e2v technologies, Chelmsford, Essex
- V. Variale
INFN-Bari, Bari
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It is proposed to use an SCL, starting at 30MeV, up to 230MeV. The linac consists of 25 modules (two tanks each). Twelve, 3GHz power generators, feed two modules in parallel, with the last power generator feeding the last module. The SCL is designed, assuming a mean accelerating field in the cavities of 16,5MV/m. The longitudinal and transverse beam dynamics has been studied, assuming that the input parameters (emittance, energy spread and mean current) are those of commercial 30MeV cyclotrons. The characteristics of the ejected beam were analysed: the transmittance value is largely sufficient to deliver a correct dose for therapy; the beam line activation is kept largely below allowed levels; the output energy spread is sufficiently small. The first prototype module is under construction and a second one is under design. Contacts with e2v have been established for defining an agreement, which proposes to use magnetrons as feeders for the acceleration tests. Attention was therefore paid to phase locking constraints between feeders. Theoretical studies suggest that transmittance stays constant if de-phasing is kept into values that seem attainable with magnetrons.
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