Aluminum Clamshell Vacuum Chamber Development Plan T Fornek

Aluminum Clamshell Vacuum Chamber Development Plan T. Fornek July 11, 2007 T. Fornek 1

Thanks to Rodd Pope Carl Rago Karen Fant Andy Haas Dan Wright July 11, 2007 T. Fornek 2

Concept to Achieve Physics Design “All Aluminum” Alloy 6061 -T 651 Clamshell Halves 6061 -T 651 Strongback Al-to-SST Transition Inserts or Flanges Discrete, End Pumping Race Track Aperture, 5 mm x 12 mm Support/Adjuster Common with ANL Design Fabrication Process Precision machined halves Cleaned with Etch Polished Cleaned Welded Baked Assembled to Strongback July 11, 2007 T. Fornek 3

Prototype Al Clamshell Machined from stock, mechanically polished July 11, 2007 T. Fornek 4

2 Prototype Al Clamshells Seam welded Flanges welded Flange hidden July 11, 2007 T. Fornek 5

2 Prototype Al Clamshells with Al Strongback Two Part Al Epoxy – Devcon Al Putty (tack weld may be an option) Flange hidden July 11, 2007 T. Fornek 6

Prototype Clamshells & Strongback on Adjuster Supports Common Adjuster Support Compatible July 11, 2007 T. Fornek Flange hidden 7

Clamshells, Strongback, & Flange on Adjuster Supports Vacuum Test Flange Not production Adjuster Support July 11, 2007 T. Fornek 8

Half-length Clamshell Assembly July 11, 2007 T. Fornek 9

50% Length Vacuum Test Chamber on Adjuster Supports Common Adjuster Support Design July 11, 2007 T. Fornek 10

Remaining Parts July 11, 2007 T. Fornek 11

What Has Been Demonstrated Machining process on half-length clamshell Hand welding of clamshells Hand welding of aluminum/stainless flanges to aluminum clamshell assembly Epoxy bonding of clamshell to strongback Polishing of flat coupons July 11, 2007 T. Fornek 12

What Needs to be Demonstrated Machining process on full-length clamshell Automated welding of clamshells Polishing of clamshell Effect of cleaning on polished surface Effect of welding on surface finish Bake-out and vacuum performance Full length strongback fabrication July 11, 2007 T. Fornek 13

Current Plans Pursue polishing of existing clamshells to demonstrate achievable surface finish Development and Delivery Schedule 3 Months to Full Length Prototype 6 months to complete fabrication and delivery July 11, 2007 T. Fornek 14

End of Presentation July 11, 2007 T. Fornek 15