1. f James T Volk Arpil 20021 Permanent Magnets for Linear Colliders James T Volk Fermilab

2. f James T Volk Arpil 20022 Why Permanent Magnets No Power Supplies No Cables No Water Cooling No Operating Expense Temperature stable Time stable Easy to Assemble Can be in-expensive depending on field required and material chosen

3. f James T Volk Arpil 20023 Where can they be used Fixed energy transport lines Bending Focusing Injection or extraction Storage Rings Quadrupoles in the LIANC Final Focus near or inside of detectors Damping Rings

4. f James T Volk Arpil 20024 Fermilab Recycler 8 GeV transfer line: 750 m long from booster to MI 8 GeV anti proton storage ring Over 500 gradient and quadrupole permanent magnets Temperature stable Fields adjusted to within 5 parts in 10 4 Harmonics 1 part in 10 4 Vertical and Horizontal tune within 0.001 of design Gradient Magnets Mirror Magnets

5. f James T Volk Arpil 20025 Representative Dipole Technologies

6. f James T Volk Arpil 20026 Representative Quadrupole Technologies

7. f James T Volk Arpil 20027 Quadrupole on Girder

8. f James T Volk Arpil 20028 NLC LINAC Quad Specs

9. f James T Volk Arpil 20029 Wedge Quad Rods rotate to adjust field Pole Magnets Tuning Rods Wedge Magnets Flux Return Poles

10. f James T Volk Arpil 200210 NLC adjustable quad on SSW stand Quad Stretched wire stages

11. f James T Volk Arpil 200211 End view of Adjustable Quad Tuning rod

12. f James T Volk Arpil 200212 Center shifts wedge quad

13. f James T Volk Arpil 200213 Counter Rotating Quadrupole

14. f James T Volk Arpil 200214 Counter Rotating Quad Data

15. f James T Volk Arpil 200215 Results

16. f James T Volk Arpil 200216 Issues Improve center stability Time stability Temperature stability Motor controls Optimize Design New Designs

17. f James T Volk Arpil 200217 Radiation Damage Summary

18. f James T Volk Arpil 200218 Radiation Damage in SM Cobalt

19. f James T Volk Arpil 200219 Radiation Damage Issues Identify Radiation fields where PM could be used Obtain consistent data on field loss Determine Field loss as a function of: Type of radiation Amount of radiation Dependence on Hc and other magnet parameters Dependence on manufacturer