LCLS Extruded Vacuum Chamber

1

• LCLS Extruded Vacuum Chamber
• 
  (current status)
• Emil Trakhtenberg
• Greg Wiemerslage
• Mark Erdmann
• Patrick Den Hartog

2

LCLS vacuum chamber current status

• All 41 chambers are fully machined.
• 41 chambers have been welded.
• 35 chambers were inspected, baked, certified and
  shipped to SLAC.
• The rest of the chambers will be shipped to SLAC
  before 05/10/08.

3
Changes in LCLS VC design after production of
the first six chamber to simplify its alignment
First six chambers
All other chambers
4

LCLS vacuum chamber adjustment and wall thickness
inspection

• After changing of the chamber design and
  adjusting system design
• chamber alignment usually took about 4 hours.
• Wall thickness variation for the most of the
  chambers is within 40µ.
• Some results of the vacuum chamber inspection
  are shown on
• the next slides

5


6


7
LCLS VC alignment and thickness inspection
8
Graphical Display of Surface finish Data

Should be Avoided
Acceptable
Very Desirable
9
Surface Finish Summary

• The average of all vacuum chambers is 14.86 mrad
  in Z' and 35.14 mrad in X'
• Extrusions 7, 10, 16, 28 and 35 were sacrificed
  to verify surface finish in the middle of the
  extrusions

10
LCLS VC on the weldment table
Flange installation fixture
11
End bi-metal flange welding
All bi-metal flanges were polished, inspected and
welded
12
Inspection and correction of the LCLS VC end
flange perpendicularity (.003 - .004 precision)
13
Inspection of the total length of the LCLS VC
Initial attempt to inspect the vacuum chamber
length using caliper, gage block and filler gage
failed.
Finally length of the all vacuum chambers after
welding was measured successfully using laser
tracker.
14
Summary of the Inspection of the total length of
the LCLS VC
15
LCLS VC on the baking stands
16
LCLS VC on the baking stands
Note Ion-pumps are still off
17
LCLS vacuum chambers in the shipping crate
18
CONCLUSION

• Manufacturing and certification of the LCLS
  vacuum chambers is proceeding with the full
  agreement with our schedule and within the
  allocated budget.
• We plan to deliver all LCLS VC to SLAC before
  05/10/2008

19
ACKNOWLEDGMENTS

• A special thank you to
• Joe Gagliano, George Goeppner,
• Dana Capatina, Scott Doran, Esiquio Salazar,
  Kevin Knoerzer, Russel Otto, Dan Nocher, Mike
  Bosek, Dan VanLannan,
• Wayne Michalek, Mark Martens, Paul Aguirre,
  Aaron Lopez,
• Lahsen Assoufid, Jun Qian, Albert Macrander
• Frank Bock (Cardinal aluminum Co.),
• Don Fulcher (Engineered Finishing Co.),
• Simon Sorsher (Hi-Tech Mfg.).