1. LCLS Week 2 The Extruded Aluminum vacuum chamber…
12/1/2018
LCLS Week 2 The Extruded Aluminum vacuum chamber…
Test

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. Polishing Results So Far…

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. Vacuum Chamber Specifications
12/1/2018
Vacuum Chamber Specifications
A draft Engineering Specification Document (ESD) is written. Requirements are below.
Parameter
Value
Achieved
Thickness of chamber at aperture
/-.05 mm
5.995 – mm
Aperture height
5.00 ± .08 mm
4.990 – mm
Overall flange to flange length
/-0.8 mm
min
max
Vertical straightness of the mounted chamber after alignment
≤ mm
0.059 mm worst case
Beam stay-clear radius around the chamber aperture axis
≥ 2.3 mm
2.47 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 scan
All peaks ≤ 44 AMU
Vacuum chamber material
6063 aluminum
Test

6. LCLS VC thickness inspection

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. Inspection and correction of the LCLS VC end flange perpendicularity (
Inspection and correction of the LCLS VC end flange perpendicularity ( precision)

9. Inspection of the end length of the LCLS VC (.001” precision)

10. Two LCLS VC on the baking stands

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

12. First production LCLS VC in the shipping crate

13. The Schedule… Event Original Completion Date Updated Completion Date
Polishing of extrusions
12/07/07
Straightening of extrusion
Machining of extrusions
4/21/08
Chamber Processing at ANL
4/23/08
Ship Chambers 1-5 to SLAC
1/23/08
2/1/08
Ship Chambers 6-10 to SLAC
1/28/08
2/22/08
Ship Chambers to SLAC
3/10/08
3/14/08
Ship Chambers to SLAC
3/26/08
4/4/08
Ship Chambers to SLAC
4/25/08
4/29/08

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. Minor changes in LCLS VC design to simplify its alignment
First six chambers
All other chambers

16. CONCLUSION
Manufacturing and certification of the LCLS vacuum chambers is proceeding according to our schedule and within the allocated budget

17. ACKNOWLEDGMENTS Simon Sorsher (“Hi-Tech Mfg.”).
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.”).