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Harold G. Kirk Brookhaven National Laboratory Rings with 400 and 800 MHz RF Ring Cooler Meeting Oxford, Ms. March 11- 12, 2004

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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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Page 1: Rings with 400 and 800 MHz RF

Harold G. KirkBrookhaven National Laboratory

Rings with 400 and 800 MHz RF

Ring Cooler Meeting Oxford, Ms. March 11-12, 2004

Page 2: Rings with 400 and 800 MHz RF

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

Page 3: Rings with 400 and 800 MHz RF

Harold G. Kirk

Recalculation with ICOOL V2.66 ICOOL V2.59 ICOOL V.266

Page 4: Rings with 400 and 800 MHz RF

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

Page 5: Rings with 400 and 800 MHz RF

Harold G. Kirk

Skew Quadrupoles Performance

Horizontal Focusing

Page 6: Rings with 400 and 800 MHz RF

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

Page 7: Rings with 400 and 800 MHz RF

Harold G. Kirk

Strong Focusing Ring Performance

n = -0.6 rf at 8 MV/m

Page 8: Rings with 400 and 800 MHz RF

Harold G. Kirk

50 Atmospheres Performance

Page 9: Rings with 400 and 800 MHz RF

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

Page 10: Rings with 400 and 800 MHz RF

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

Page 11: Rings with 400 and 800 MHz RF

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

Page 12: Rings with 400 and 800 MHz RF

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

Page 13: Rings with 400 and 800 MHz RF

Harold G. Kirk

Analysis Summary


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