1. Morteza Aslaninejad Cristian Bontoiu Juergen Pozimski
Cavities in NF-Linac
Morteza Aslaninejad
Cristian Bontoiu
Juergen Pozimski

2. Fast acceleration Linear Pre-accelerator (244 MeV to 900 MeV)
RLA I pass, 0.6 GeV/pass, (0.9 GeV to 3.6 GeV )
RLA II pass, 2 GeV/pass (3.6 GeV to 12.6 GeV )
Non scaling FFAG - 8 revolutions (12.6 GeV to 25 GeV )

3. Linac components Number of solenoids: 6+8+11 = 25 Number of Cavities :
6+8*2+11*4 = 66
Target Frequency : MHz
Bunch spacing : 5 ns
Number of Bunches :88

4. SC Linac - 244 to 909 MeV. 25 cavities: First 6. 744826 m cavities
SC Linac to 909 MeV. 25 cavities: First 6* m cavities. Second 8* m cavities. Third 11* 2* m cavities.
8 one meter solenoids.
ks=1
6,one meter
solenoids.
ks=1.4
11 one meter solenoids. ks=0.83
8 medium cryos
17 MV/m
11 long cryos
17 MV/m
6 short cryos
15 MV/m
1.1 Tesla solenoid
1.4 Tesla solenoid
2.4 Tesla solenoid

5. M. Aslaninejad (J. Pasternak)
, CERN
M. Aslaninejad (J. Pasternak)

6. 0.685m
0.744m
0.230m

7. Single Cavity Design-Comsol

8. Frequency Scan

9. Single cavity with two tails

10. Frequency Scan

12. Single cavity with two tails Poisson-Superfish
f= MHz

13. Ez

14. Cavity Pair without tails

15. Frequency scan

17. f= e8
f= e8

18. f= e8
f= e8

19. Pair cavities with two tails

20. Frequency scan

22. Pair cavities using Poisson- Superfish
f= MHz

23. Ez

24. Outlook
Cavities for the Linac with different geometries using Comsol-RF module have been simulated.
Frequency scan , field map and characteristic parameters have been obtained.
Field map for solenoids produced.
Particle tracking using GPT done(Cristian)
Issues like Beam loading are consider(Juergen)