1. Zack Wolf Quadrupole Fiducialization Procedurewolf@slac.stanford.edu October 20, 2005 1 A Vibrating Wire System For Quadrupole Fiducialization Zack Wolf, Dave Jensen, Ralph Colon with help from Alexander Temnykh (Cornell)

2. Zack Wolf Quadrupole Fiducialization Procedurewolf@slac.stanford.edu October 20, 2005 2 System Accuracy Requirements Place wire at quadrupole center: 10 um Locate wire relative to tooling balls: 15 um Locate tooling balls on wire detector relative to tooling balls on magnet: 10 um Vertical and horizontal errors: Total fiducialization error budget: 25 um LCLS PRD 1.4-001

3. Zack Wolf Quadrupole Fiducialization Procedurewolf@slac.stanford.edu October 20, 2005 3 System Overview LCLS-TN-05-11

4. Zack Wolf Quadrupole Fiducialization Procedurewolf@slac.stanford.edu October 20, 2005 4 Place Wire At Quadrupole Center Similar To Pulsed Wire Technique

5. Zack Wolf Quadrupole Fiducialization Procedurewolf@slac.stanford.edu October 20, 2005 5 System Under Construction

6. Zack Wolf Quadrupole Fiducialization Procedurewolf@slac.stanford.edu October 20, 2005 6 Signals

7. Zack Wolf Quadrupole Fiducialization Procedurewolf@slac.stanford.edu October 20, 2005 7 Set Resonant Frequency In phase signal 90 degree out of phase signal LCLS-TN-05-11

8. Zack Wolf Quadrupole Fiducialization Procedurewolf@slac.stanford.edu October 20, 2005 8 Signal vs Magnet Position Measurements

9. Zack Wolf Quadrupole Fiducialization Procedurewolf@slac.stanford.edu October 20, 2005 9 Wire Location LCLS-TN-05-11

10. Zack Wolf Quadrupole Fiducialization Procedurewolf@slac.stanford.edu October 20, 2005 10 Wire Position Detector

11. Zack Wolf Quadrupole Fiducialization Procedurewolf@slac.stanford.edu October 20, 2005 11 Conclusion A system is being constructed in which: 1)A quadrupole will be centered on a wire to 10 microns 2)The wire will be located relative to tooling balls to 15 microns 3)All tooling balls will be located to 10 microns The overall fiducialization accuracy in x and y will be better than 25 microns. The magnet pitch and yaw will be smaller than 1 mrad. More tests need to be done: repeatability, no bias, etc.