1. January 22-24, 2008 1 LCLS Week 2 The Extruded Aluminum vacuum chamber…

2. January 22-24, 2008 2 Progress to Date… Polishing continues… Twenty-five pieces already delivered to Hi-Tech for Machining We continued to adjust the recipe for polishing as we went along up to this point—we now feel we can polish more consistently within a more satisfying range. Ten more pieces scheduled for delivery to Hi-Tech on 1/30 The remaining ten pieces to be delivered to Hi-Tech in early February

3. January 22-24, 2008 3 Polishing Results So Far…

4. January 22-24, 2008 4 Progress continued… Machining continues… Six production chambers delivered to ANL Chamber machining was temporarily on hold for machining of chamber alignment plates This “hold” period allowed us to learn a little more about the alignment and machining of the production chambers All 120 plates now fully machined. The next batch of production chambers now being machined—delivery anticipated 2/3.

5. January 22-24, 2008 5 Vacuum Chamber Specifications A draft Engineering Specification Document (ESD) is written. Requirements are below. ParameterValueAchieved Thickness of chamber at aperture6.00 +.15/-.05 mm5.995 – 6.122 mm Aperture height5.00 ±.08 mm4.990 – 5.118 mm Overall flange to flange length3464.44 +0.2/-0.8 mm 3463.90 min 3464.64 max Vertical straightness of the mounted chamber after alignment≤ 0.050 mm0.059 mm worst case Beam stay-clear radius around the chamber aperture axis≥ 2.3 mm2.47 mm worst case Average rms slope error goal of aperture in both longitudinal and transverse directions – best effort See table- Average vacuum pressure< 10 -6 Torr<5 x 10 -7 RGA mass scanAll peaks ≤ 44 AMU Vacuum chamber material6063 aluminum

6. January 22-24, 2008 6 LCLS VC thickness inspection

7. January 22-24, 2008 7 LCLS VC dimensional inspection and installation test LCLS VC on the alignment stand LCLS VC on the granite table for the length inspection

8. January 22-24, 2008 8 Inspection and correction of the LCLS VC end flange perpendicularity (.003 -.004 precision)

9. January 22-24, 2008 9 Inspection of the end length of the LCLS VC (.001” precision)

10. January 22-24, 2008 10 Two LCLS VC on the baking stands

11. January 22-24, 2008 11 Progress continued… First Delivery to LCLS Soon… On 1/28, the first five chambers will depart ANL

12. January 22-24, 2008 12 First production LCLS VC in the shipping crate

13. January 22-24, 2008 13 The Schedule… EventOriginal Completion Date Updated Completion Date Polishing of extrusions12/07/07 Straightening of extrusion Machining of extrusions4/21/08 Chamber Processing at ANL4/23/08 Ship Chambers 1-5 to SLAC1/23/082/1/08 Ship Chambers 6-10 to SLAC1/28/082/22/08 Ship Chambers 11-20 to SLAC3/10/083/14/08 Ship Chambers 21-30 to SLAC3/26/084/4/08 Ship Chambers 31-40 to SLAC4/25/084/29/08

14. January 22-24, 2008 14 What we learned along the way… The overall length is difficult to predict precisely due to shrinkage during the welding of the ends. The Dycor RGA heads short out easily. Two shorts in five chambers??? The alignment system … We are evaluating other options that we hope may be easier to use. Eliminate the compound screw that limits roll adjustment???

15. January 22-24, 2008 15 Minor changes in LCLS VC design to simplify its alignment First six chambers All other chambers

16. January 22-24, 2008 16 CONCLUSION Manufacturing and certification of the LCLS vacuum chambers is proceeding according to our schedule and within the allocated budget

17. January 22-24, 2008 17 ACKNOWLEDGMENTS A special “thank you” to: Mark Erdmann, 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, Tom Inwood (“Engineered Finishing Co.”), Simon Sorsher (“Hi-Tech Mfg.”).