Eurisol driver: heavy ion capabilities A . Pisent, M. Comunian, A. Facco, E. Fagotti, (INFN-LNL)

1. Eurisol driver: heavy ion capabilities A. Pisent, M. Comunian, A. Facco, E. Fagotti, (INFN-LNL) R. Garoby (CERN), P. Pierini (INFN-MI)

2. 5 MeV 85 MeV 1000MeV The heavy-ion capabilities of the linac Can this same linac accelerate A/q=2 up to the same energy (i.e.same equivalent voltage)? High energy Intermediate energy Low energy 1000MeV/q ?

3. In an electrostatic accelerator In a warm linac, where V=Ea*length In a superconducting linac The energy gain per cavity is: Definition of TTF (transit time factor) E b0l/2 2 gaps 3 gaps 4 gaps 5 gaps TTF(b/b0) 6 gaps

4. Key point: independent RF sources • We assumed the existing p linac design. • In Eurisol p linac each cavity has an independent RF source

5. 5 MeV 85 MeV/u We identified three scenarios • The acceleration of heavy ions, A/q = 2 & 3 up to the end of the proton linac intermediate section (85 MeV). • The acceleration of heavy ions with A/q = 2 up to the end of the main linac (1 GeV). • The acceleration of heavy ions with A/q = 3 up to 100 MeV/u with a modification of the proton linac architecture. 1000MeV 5 MeV 85 MeV 1000MeV 5 MeV 255 MeV 1000MeV

6. 5 MeV 85 MeV First scenario: SPES like • The acceleration of heavy ions, A/q = 2 & 3 up to the end of the proton linac intermediate section (85 MeV). • The acceleration of heavy ions with A/q = 2 up to the end of the main linac (1 GeV). • The acceleration of heavy ions with A/q = 3 up to 100 MeV/u with a modification of the proton linac architecture. 1000MeV 5 MeV 85 MeV 1000MeV 5 MeV 255 MeV 1000MeV

7. SPES project @ Legnaro Target area BNCT Driver linac: Eurisol up to 100 MeV/u Exp. Halls ALPI (d)

8. Ladder Reentrant Superconducting cavities under developement(352 MHz) HWR (Half Wave Resonator)

10. 5 mA p beam 30 mA p 3 mA d RIB production target Superconducting main linac Proton injector Beam dump BNCT moderator RFQ Trips LEBT rastering TRASCO RFQ Low energy high current applications A/q=3 upgrade

11. 5 MeV 85 MeV/u Second scenario • The acceleration of heavy ions, M/q = 2 & 3 up to the end of the proton linac intermediate section (85 MeV). • The acceleration of heavy ions with M/q = 2 up to the end of the main linac (1 GeV). • The acceleration of heavy ions with M/q = 3 up to 100 MeV/u with a modification of the proton linac architecture. 1000MeV 5 MeV 85 MeV 1000MeV 5 MeV 255 MeV 1000MeV

14. 5 MeV 85 MeV/u Third scenario • The acceleration of heavy ions, M/q = 2 & 3 up to the end of the proton linac intermediate section (85 MeV). • The acceleration of heavy ions with M/q = 2 up to the end of the main linac (1 GeV). • The acceleration of heavy ions with M/q = 3 up to 100 MeV/u with a modification of the proton linac architecture. 1000MeV 5 MeV 85 MeV 1000MeV 5 MeV 255 MeV 1000MeV

15. Third scenario: heavily revised architecture

16. Third scenario: heavily revised architecture Proton mode 5 MeV 255 MeV 1000MeV Intermediate energy part extended up to 255 MeV: the first high energy cavity family is avoided (HWR or spoke up to high energy) Heavy ion mode q/A=1/3 7 MeV/u 90 MeV/u 1000MeV

18. Conclusions • The superconducting linac is flexible, but increasing heavy ion capabilities have increasing costs

19. 5 MeV 85 MeV/u Very approximately for the three scenarios • The injector costs about 14 M€ • doubling the intermediate linac costs approximately 25 M€ • Two gap architecture for up to 255 MeV: first guess 25 M€. 1000MeV 5 MeV 85 MeV 1000MeV 5 MeV 255 MeV 1000MeV

20. Conclusions • The superconducting linac is flexible, but increasing heavy ion capabilities have increasing costs • The developement of a superconducting version of the intermediate part is very important for Eurisol linac, for protons and for heavy ions • The applications of such a linac are much wider (and synergies in the R&D are possible).