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Morteza Aslaninejad Cristian Bontoiu Juergen Pozimski
Cavities in NF-Linac Morteza Aslaninejad Cristian Bontoiu Juergen Pozimski
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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 )
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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
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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
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M. Aslaninejad (J. Pasternak)
, CERN M. Aslaninejad (J. Pasternak)
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0.685m 0.744m 0.230m
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Single Cavity Design-Comsol
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Frequency Scan
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Single cavity with two tails
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Frequency Scan
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Single cavity with two tails Poisson-Superfish
f= MHz
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Ez
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Cavity Pair without tails
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Frequency scan
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f= e8 f= e8
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f= e8 f= e8
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Pair cavities with two tails
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Frequency scan
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Pair cavities using Poisson- Superfish
f= MHz
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Ez
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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)
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