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LCLS Undulator Support & Mover System Design Review

Final review and procurement considerations for LCLS Undulator Support and Movers. Details on design features, positioning tolerances, prototype housing, camshaft movers, magnetic field effectiveness, phase error, support frame, and conclusion.

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LCLS Undulator Support & Mover System Design Review

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  1. Undulator for the LCLS project - design of the support and mover system LCLS Undulator Final Design Review

  2. Design and Procurement Consideration for the LCLS Undulator Support and Movers OUTLINE • Current Design features • Latest Design Changes • Long Lead Items (none) LCLS Undulator Final Design Review

  3. LCLS COMPONENT POSITIONING TOLERANCE Quadrupole motion positioning accuracy ±2 µm Short term (10 h) BPM and Quad stability ±1 µm Minimum Quad motion range radius 0.75 mm Maximum Quad motion range radius 1.2 mm BPM and Quad stability to position sensors 1 µm Vacuum chamber transverse position tolerance ±100 µm Quad center position manual adjustment range ±2 mm Quad center position manual adjustment resolution 2 µm Longitudinal Cradle motion constraint ±3 mm Quad and BPM position stability during roll-away cond. 2 µm Hor. And Vert. seg. pos. repeatability in roll-away cycle 10 µm Quad center long term (2 month) stability 1 µm BPM center long term (2 month) stability 1 µm Longitudinal component positioning tolerance ±1 mm Vacuum chamber to CA alignment tolerance ±100 µm Cradle replacement tolerance ±100 µm LCLS Undulator Final Design Review

  4. LCLS Prototype Undulator Housing on the Support Stand LCLS Undulator Final Design Review

  5. Camshaft movers for LCLS undulator LCLS Undulator Final Design Review

  6. Results of the LCLS undulatormotion test LCLS Undulator Final Design Review

  7. Camshaft mover for LCLS undulator(old design) LCLS Undulator Final Design Review

  8. Camshaft mover for LCLS undulator(new design) LCLS Undulator Final Design Review

  9. Effective magnetic field • Measured slope of 6.6 Gauss/mm agree with calculations (~ 5.7 Gauss/mm for 3 mrad cant) • Alignment accuracy needed for DB/B ~ 1.5x10-4 ~ 2 Gauss -> 0.3 mm LCLS Undulator Final Design Review

  10. RMS phase error • No significant dependency on X • An RMS phase error of ~ 6.5 degree is an upper limit for near-perfect (~100%) performance LCLS Undulator Final Design Review

  11. Undulator unit with the support frame LCLS Undulator Final Design Review

  12. Undulator midplane sagging for the different support location LCLS Undulator Final Design Review

  13. Conclusion • Design and preparation for the procurement of support components and movers is a 2005 FY task; • Final cradle design requires more information about all break components, quadrupole lens and vacuum chamber support design; • Full scale prototyping of the support and movers is a must; • There are no long lead items in the support and mover system, so after the prototype test road is open for a full scale procurement. LCLS Undulator Final Design Review

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