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

2. Harold G. Kirk Gas Filled Dipole Wedge Rings Key parameters at r = 60 cm  x = 53 to 72 cm ;  y = 60 to 64 cm Dispersion = 60 to 64 cm Circumference = 3.91 m

3. Harold G. Kirk Recalculation with ICOOL V2.66 ICOOL V2.59 ICOOL V.266

4. Harold G. Kirk Introduce Skew Quadrupoles l Bracket dipoles with thin (3cm) skew quadroles l Skew quadrupoles real estate at 9% circumference l Test various gradients. l X/Y Coupling achieved

5. Harold G. Kirk Skew Quadrupoles Performance Horizontal Focusing

6. Harold G. Kirk An FFAG-like Lattice Lattice consists of alternating Horz. Defocusing and Horz. Focusing with L HD = ½ L HF. No drift cells between dipole elements. Parameters 12 cells Bend angles 30 o and –15 o Circumference = 6m B o = 2.6T and P o = 250 MeV/c Dispersion = 25 cm

7. Harold G. Kirk Strong Focusing Ring Performance n = -0.6 rf at 8 MV/m

8. Harold G. Kirk 50 Atmospheres Performance

9. Harold G. Kirk A Demonstration Scenario l Merit factor of ~ 10 is sufficient l Muon decay ignored l Rf frequency at 800 MHz l Beam aperature at ±7 cm Gas density at 10 atmos at 77  K l DC dipole field at 1.5T l Pulsed dipole field ~ 3T

10. Harold G. Kirk Weak Focusing Lattice Lattice Parameters l Skew Quads at 1.5 T/m l RF at 400 MHz l 40 Atmospheres GH 2 l Aperture ± 10 cm l Merit without decay l B 0 = 2.62 T

11. Harold G. Kirk Strong Focusing Lattice Lattice Parameters l RF at 400 MHz l 40 Atmospheres GH 2 l Aperture ± 10 cm l Merit without decay l B 0 = 2.62 T

12. Harold G. Kirk Strong Focusing Lattice (cont) Lattice Parameters l RF at 800 MHz l 40 Atmospheres GH 2 l Aperture ± 7.5 cm l Merit without decay l B 0 = 2.62 T

13. Harold G. Kirk Analysis Summary