THE BETA-BEAM DECAY RING DESIGN

SUMMARY A design for the decay ring has been realized with BETA [11] at the first and second orders. The different functional parts of the ring have been studied. The arc entry is specially made to ex tract the decay products from the long straight sections. The Twiss parameters at the septum blade enable to inject a beam at an energy /=5 ‰ Moreover, sextupoles have been put in the arcs to compensate the third order resonances. The dynamic aperture is then large enough: the decay ring accepts the injected and stored beams at the first and second orders. We acknowledge the financial support of the European Community under the FP6 “Research Infrastructure Action - Structuring the European Research Area” EURISOL DS Project Co ntract no. 515768 RIDS . REFERENCES [1] P.Zucchelli, "A novel concept for a neutrino factory: the beta-beam", Phys. Let. B, 532 (2002) 166-172 [2] J. Bouchez, M. Lindroos and M. Mezzetto, “Beta-beams: Present design an d expected pe rformance” , In the proceedings of Nuf act 03, New York, 2003 [3] M. Benedikt, S.Hancock and M.Lindroos, “Baseline Design for a Beta-Beam Neutrino Factory”, EPAC, 2004, Lucerne, Switzerland [4] A. Chance and J. Payet, “Loss management in the beta-beam decay ring”, this Conf. [5] A. Chance and J. Payet, First design for the optics of the decay ring of the beta-beams, , DAPNIA-06-38, EURISOL DS/TASK12/TN-06-05 [6] A. Chance and J. Payet, Simulation of the losses by decay in the decay ring for the beta-beams, DAPNIA-06-39, EURISOL DS/TASK12/TN-06-06 [7] M. Benedikt and S. Hancock “A Novel Scheme for the Injection and Stacking of Radioactive Ions at High Energy”, NIM A 550 (2005) 1–5 [8] A. Chance and J. Payet, Studies of the injection system in the decay ring of a Beta-beam neutrino source , PAC 2005 [9] S. Hancock and A. Chance, “Stacking simulations in the beta-beam decay ring”, this Conf. [10] P. Brunelle et al., “New Optics for SOLEIL”, EPAC 1994 [11] Code BETA, J. Payet Proceedings of EPAC 2006, Edinburgh, Scotland WEPCH00805 Beam Dynamics and Electromagnetic FieldsD01 Beam Optics - Lattices, Correction Schemes, Transport1935