1 / 20

Undulator Tuning and Fiducialization

This document provides an overview of the current status and schedule of undulator tuning and fiducialization. It also discusses problems and repairs, as well as recent plans to increase the K adjustment range. The measurements and tuning accuracy are within tolerances, and there will be modifications to X and Y trajectory shims to address interference with the vacuum chamber. All undulators will be re-measured, re-fiducialized, and have the shims replaced by the end of November.

edwardsgeorge
Download Presentation

Undulator Tuning and Fiducialization

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Undulator Tuning and Fiducialization S. Anderson, R. Colon, S. Jansson, S.Kaplunenko, Y. Levashov, Ed. Reese , R. Ruland , A. Weidemann, Z. Wolf

  2. Outline • Undulator quad tuning and fiducialization status • Undulator tuning and fiducialization status and schedule • Problems / repairs • Extend K Adjustment Range X-trajectory shims Y-trajectory shims • Reference undulator measurements

  3. Undulator Quadrupoles Strength And Harmonics Measurements

  4. Coil Measurements • 15 Undulator Quads have been measured with the rotating coil. • 1 Undulator quad measured every 2 days. 19 quads left to measure = 38 work days. Final Magnet June 26th.

  5. Magnetic Center Fiducialization Vibrating Wire System

  6. Fiducialization Status • 8 Undulator quads fiducialized. • Schedule: 1 undulator quad measured every 1.5 days. 26 quads left to measure = 39 work days + 3 days for reference magnet check. Final magnet: June 30th.

  7. Undulator Tuning And Fiducialization • Overview • The tuning is going well • Almost done with 33 (details to follow) • Mounting feet standardization is progressing • Problem with storage, need to re-fiducialize 15 undulators • Repairs of un-tunable undulators have started • Recent plan to increase K adjustment range • The measurements look good • Stable, low noise, … • Hall probe, short coil, long coil measurements agree • The reference undulator measurements are very stable

  8. Undulator Measurement Status Done (6) (in Bldg. 33) Ready for feet (5) (in MMF) Fiducialization on CMM To be re-fiducialized (15) (in Bldg. 750) To be tuned (2) Repaired, in fine tuning 04/08 05/15/08 05/08 To be repaired (8) At Argonne (2) R.Ruland

  9. Storage Temperature Problem Max temperature change -8 deg C Gap change during storage 1 micron average gap change Trajectories and field integrals fine, phase changes around 2 deg (ok), average gap change shifts axis (re-fiducialization required)

  10. Repairs RequiredBefore repair 130µm Two areas to replace shims Ed Reese

  11. After Repair 50µm Ed Reese

  12. Tuning summary • Rough tuning done by the end of May. • Fine tuning done by the middle of June. • Re-fiducialization done by the end of September • Repairs start in May; finished by the end of year.

  13. New: Extend K Adjustment Range • Originally, ±2.5 mm horizontal adjustment range required • New Bx shims allow ±6 mm horizontal good field region • Want to extend undulator horizontal adjustment range • Need to solve beam pipe clearance problems

  14. Interference with vacuum chamber X-trajectory shim Cut material off • X-trajectory shims limit vacuum chamber “in”-motion to 2.5mm • Undulators tuned for ±6 mm • Shims to be modified to allow - 6mm motion and • Undulator tuning to be checked

  15. X trajectories

  16. Interference with vacuum chamber. Continued New Old Fix, new triangles on old strongback

  17. Y trajectories

  18. X field integrals

  19. Reference undulator Problem with probe calibration* Probe re-calibrated Ktarget=3.498632 K is corrected for temperature and X-position R.M.S. = 910-5 * Z. Wolf “Undulator tuning and fiducialization schedule”. FAC Meeting, April 2007

  20. Conclusion • 30 undulators went through rough tuning and 29 – through fine tuning processes. • MMF throughput is 2 devices/month. • Repairs of un-tunable undulators has started. • Tuning accuracy is within the tolerances. • The K adjustment range will be increased. • Due to interference with the vacuum chamber in off-axis position, X and Y trajectory shims will be modified/replaced on all undulators. • All undulators will be re-measured and re-fiducialized and have the shims replaced by the end of November.

More Related