lcls week 2 the extruded aluminum vacuum chamber…
DESCRIPTION
LCLS Week 2 The Extruded Aluminum vacuum chamber…. Progress to Date…. Polishing continues… Twenty-five pieces already delivered to Hi-Tech for Machining - PowerPoint PPT PresentationTRANSCRIPT
January 22-24, 20081
LCLS Week 2The Extruded Aluminum vacuum chamber…
January 22-24, 20082
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
January 22-24, 20083
Polishing Results So Far…
January 22-24, 20084
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.
January 22-24, 20085
Vacuum Chamber SpecificationsA draft Engineering Specification Document (ESD) is written. Requirements are below.
Parameter Value Achieved
Thickness of chamber at aperture 6.00 +.15/-.05 mm 5.995 – 6.122 mm
Aperture height 5.00 ± .08 mm 4.990 – 5.118 mm
Overall flange to flange length 3464.44 +0.2/-0.8 mm
3463.90 min
3464.64 max
Vertical straightness of the mounted chamber after alignment ≤ 0.050 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 All peaks ≤ 44 AMU
Vacuum chamber material 6063 aluminum 6063 aluminum
January 22-24, 20086
LCLS VC thickness inspection
January 22-24, 20087
LCLS VC dimensional inspection and installation test
LCLS VC on the alignment stand
LCLS VC on the granite table for the length inspection
January 22-24, 20088
Inspection and correction of the LCLS VC end flange perpendicularity (.003 - .004 precision)
January 22-24, 20089
Inspection of the end length of the LCLS VC(.001” precision)
January 22-24, 200810
Two LCLS VC on the baking stands
January 22-24, 200811
Progress continued…
First Delivery to LCLS Soon…
On 1/28, the first five chambers will depart ANL
January 22-24, 200812
First production LCLS VC in the shipping crate
January 22-24, 200813
The Schedule…Event Original Completion
DateUpdated 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 11-20 to SLAC 3/10/08 3/14/08
Ship Chambers 21-30 to SLAC 3/26/08 4/4/08
Ship Chambers 31-40 to SLAC 4/25/08 4/29/08
January 22-24, 200814
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???
January 22-24, 200815
Minor changes in LCLS VC design to simplify its alignment
First six chambers
All other chambers
January 22-24, 200816
CONCLUSION
Manufacturing and certification of the LCLS vacuum chambers is proceeding according
to our schedule and within the allocated budget
January 22-24, 200817
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.”).