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Rings with 400 and 800 MHz RF. Ring Cooler Meeting Oxford, Ms. March 11-12, 2004. Gas Filled Dipole Wedge Rings. Key parameters at r = 60 cm b x = 53 to 72 cm ; b y = 60 to 64 cm Dispersion = 60 to 64 cm Circumference = 3.91 m. - PowerPoint PPT Presentation
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Harold G. KirkBrookhaven National Laboratory
Rings with 400 and 800 MHz RF
Ring Cooler Meeting Oxford, Ms. March 11-12, 2004
Harold G. Kirk
Gas Filled Dipole Wedge Rings
Key parameters at r = 60 cmx = 53 to 72 cm ; y = 60 to 64 cmDispersion = 60 to 64 cm Circumference = 3.91 m
Harold G. Kirk
Recalculation with ICOOL V2.66 ICOOL V2.59 ICOOL V.266
Harold G. Kirk
Introduce Skew Quadrupoles
Bracket dipoles with thin (3cm) skew quadrolesSkew quadrupoles real estate at 9% circumferenceTest various gradients.X/Y Coupling achieved
Harold G. Kirk
Skew Quadrupoles Performance
Horizontal Focusing
Harold G. Kirk
An FFAG-like Lattice
Lattice consists of alternating Horz. Defocusing and Horz.Focusing with LHD = ½ LHF .No drift cells between dipoleelements.
Parameters12 cellsBend angles 30o and –15o
Circumference = 6mBo = 2.6T and Po = 250 MeV/cDispersion = 25 cm
Harold G. Kirk
Strong Focusing Ring Performance
n = -0.6 rf at 8 MV/m
Harold G. Kirk
50 Atmospheres Performance
Harold G. Kirk
A Demonstration Scenario
Merit factor of ~ 10 is sufficient Muon decay ignored Rf frequency at 800 MHz Beam aperature at ±7 cm Gas density at 10 atmos at 77 K DC dipole field at 1.5T Pulsed dipole field ~ 3T
Harold G. Kirk
Weak Focusing Lattice
Lattice Parameters Skew Quads at 1.5 T/m RF at 400 MHz 40 Atmospheres GH2
Aperture ± 10 cm Merit without decay B0 = 2.62 T
Harold G. Kirk
Strong Focusing Lattice
Lattice Parameters RF at 400 MHz 40 Atmospheres GH2
Aperture ± 10 cm Merit without decay B0 = 2.62 T
Harold G. Kirk
Strong Focusing Lattice (cont)
Lattice Parameters RF at 800 MHz 40 Atmospheres GH2
Aperture ± 7.5 cm Merit without decay B0 = 2.62 T
Harold G. Kirk
Analysis Summary
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