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HXMA WIGGLER MAINTENANCE REVIEW

HXMA WIGGLER MAINTENANCE REVIEW. Linda Lin June 2010. HXMA WIGGLER MAINTENANCE REVIEW. HXMA Wiggler Overview Installed 2004 Started operation January 2005 Has been operated for about 6.5 years. HXMA WIGGLER MAINTENANCE REVIEW. Maintenance scheduled

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HXMA WIGGLER MAINTENANCE REVIEW

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  1. HXMA WIGGLER MAINTENANCE REVIEW Linda Lin June 2010

  2. HXMA WIGGLER MAINTENANCE REVIEW HXMA Wiggler Overview • Installed 2004 • Started operation January 2005 • Has been operated for about 6.5 years

  3. HXMA WIGGLER MAINTENANCE REVIEW Maintenance scheduled • Top cold heads (re-condenser) exchange - once a year • Bottom cold heads (shield cooler) exchange - depending on temperature rise • Compressor - replace absorber after about 18,000 hours of operation • Charge helium gas to compressor as needed • Check and clean water cooling system as needed • Service cold head valve as needed • Refill wiggler with liquid helium about every 1.5 month (two runs).

  4. HXMA WIGGLER MAINTENANCE REVIEW Maintenance occurred (2005)

  5. HXMA WIGGLER MAINTENANCE REVIEW Maintenance occurred (2006)

  6. HXMA WIGGLER MAINTENANCE REVIEW Maintenance occurred (2007)

  7. HXMA WIGGLER MAINTENANCE REVIEW Maintenance occurred (2008)

  8. HXMA WIGGLER MAINTENANCE REVIEW Maintenance occurred (2008)

  9. HXMA WIGGLER MAINTENANCE REVIEW Maintenance occurred (2009)

  10. HXMA WIGGLER MAINTENANCE REVIEW Maintenance occurred (2009*) *Wiggler stopped running in July.

  11. HXMA WIGGLER MAINTENANCE REVIEW Maintenance occurred (2010)

  12. HXMA WIGGLER MAINTENANCE REVIEW Summary of replacement:

  13. HXMA WIGGLER MAINTENANCE REVIEW Observations: • Cold heads worn in specific area

  14. HXMA WIGGLER MAINTENANCE REVIEW Cold head wear on one side – 2009-09

  15. HXMA WIGGLER MAINTENANCE REVIEW Cold head wear on one side – 2009-09

  16. HXMA WIGGLER MAINTENANCE REVIEW Cold head was fine on the other side -2009-09

  17. HXMA WIGGLER MAINTENANCE REVIEW Cold head wear on one side – 2010-04

  18. HXMA WIGGLER MAINTENANCE REVIEW Cold head wear on one side – 2010-04

  19. HXMA WIGGLER MAINTENANCE REVIEW Wiggler stands with two top cold heads housing sit in 30 degree angle

  20. HXMA WIGGLER MAINTENANCE REVIEW Cold heads are mounted with 30 degree angle to wiggler vertical position

  21. HXMA WIGGLER MAINTENANCE REVIEW • Observations (Continued): • Oil contamination on cold heads, compressors and transfer lines

  22. HXMA WIGGLER MAINTENANCE REVIEW Oil appeared in the surface of the cold head – 2009-09

  23. HXMA WIGGLER MAINTENANCE REVIEW Observations (continued): • Compressor’s internal settings were configured for automatic re-start. • The top right compressor was only able to be started at 120 rpm – would not start at a lower rpm. • Ion pump is difficult to be changed • Gaskets may become stiff during liquid Helium refill - heat tape used.

  24. HXMA WIGGLER MAINTENANCE REVIEW There is no isolation valve between ion pump and wiggler

  25. HXMA WIGGLER MAINTENANCE REVIEW We have to plug the heat tapes to prevent leak from frost of rubber gasket

  26. HXMA WIGGLER MAINTENANCE REVIEW Conclusion • The wiggler runs at 1.9 Tesla successfully with the annual maintenance/emergency repair and regular refill. • The total times of cold heads’ replacement were met with the schedule in 6.5 years. • Compressors and transfer lines had lot more replacements than we expected. • The 30 degree angle seems to be a problem. • Extra work on heat tape – each refill and maintenance.

  27. HXMA WIGGLER MAINTENANCE REVIEW Conclusion (continued): • Average maintenance cost is more than 3 times the maintenance cost of the BMIT Wiggler* • Frequency of maintenance is approximately 3 times that of the BMIT Wiggler* • Liquid Helium consumption is much higher than the BMIT Wiggler* *BMIT Wiggler has seen limited operation

  28. HXMA WIGGLER MAINTENANCE REVIEW Acknowledgements: Xiaofeng, Shen Terry Johnson Ning Chen Mark Besse Harley Berndt Larry Wiebe Alex Sitnikov

  29. HXMA WIGGLER MAINTENANCE REVIEW Questions?

  30. HXMA WIGGLER MAINTENANCE REVIEW Thank you

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