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Undulator System Components Status Dean Walters

Undulator System Components Status Dean Walters. Undulator System Components Status. Components Vacuum Components Chamber Quad Spool Bellows Diagnostics RFBPM Beam Finder Wire Beam Loss Monitor. Vacuum Chamber. End bi-metal flange welding. From: E Trakhtenberg G Weimerslage.

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Undulator System Components Status Dean Walters

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  1. Undulator System Components Status Dean Walters

  2. Undulator System Components Status Components • Vacuum Components • Chamber • Quad Spool • Bellows • Diagnostics • RFBPM • Beam Finder Wire • Beam Loss Monitor

  3. Vacuum Chamber End bi-metal flange welding From: E Trakhtenberg G Weimerslage

  4. Vacuum Chamber Graphical Display of Surface finish Data The average of all vacuum chambers is 14.86 mrad in Z′ and 35.14 mrad in X′, the rms of Z’ is 15.5 mrad and X’ is 36.9 mrad. Selecting the best 33 chambers yields an rms for Z’ of 13.9 mrad and X’ of 34.2 mrad. Extrusions 7, 10, 16, 28 and 35 were sacrificed to verify surface finish in the middle of the extrusions Should be Avoided Acceptable 15.5 Very Desirable From: E Trakhtenberg G Weimerslage 36.9

  5. Quad Spool • Design • Flexible mini-bellows • Surface finish measurements of the central tube show a roughness of Sq=.18 µm

  6. Bellows Module • Initially the supplier had problems with the welding of the SST adapter to the flange. The supplier solved the problem by using the micro-TIG welding process. • Eight units are being assembled and are expected to Ship to SLAC on May 9, 2008 • The other (27) units are in the pipe line and are schedule to arrive to SLAC on May 23, 2008

  7. Beam Finder WireRepeatability Testing

  8. BFW Repeatability Test Arrangement and Results Physics Requirements: 80 Micron Horizontal & 30 Micron Vertical (RMS) “Keyence” Displacement Sensors (Typ.) Repeatability Test Arrangement

  9. RFBPMM1-Tool Works Production • M1 awarded contract for machining bodies and transitions for all 40 sets of parts • First 20 Production BPMs mechanically measured very good

  10. Altair Production End Caps • Production End Caps are in spec electrically and mechanically • Problems with polishing resolved • Production ramping up with 10 sets first received 4/22/08

  11. RFBPM Windows QC Results Since we have been measuring glass thickness and flatness and visually inspected windows. We have looked at 93 windows, 20 held aside for thin glass, 6 not flat, 1with a visual flaw.

  12. Parts Stored in Dry Nitrogen Box

  13. BPM Window Statistics • Transition and window brazed with Georo braze filler • Sub Assemblies are Vacuum checked before brazed to body • In the last run of windows being brazed to transitions there were 13 of 13 defect free parts made. • In the last run of body brazes, 3 bodies with 5 transition joints each, there were no leaks.

  14. Cavity BPM Production Statistics

  15. First Production Unit Shipped to SLAC

  16. Waveguide Status and Schedule • First Articles have been received and accepted. • Balance of the order are due 5/16/06 • Expect delivery to SLAC on 5/30/08 • BPM, waveguide and receiver test fit • So far so good

  17. Receiver Production Status and Schedule • First Unit Received 4/11/08 • Critical parameters checked meet specification • 1st receiver ship date 06/12/08 • Production of 13 receivers ship date 07/01/08 • Production of 13 receivers ship date 07/22/08 • Production of 13 receivers ship date 08/08/08

  18. Beam Loss Monitor • The BLM will be used for Two Purposes: • A: Inhibit bunches following an “above-threshold” radiation event. • B: Keep track of the accumulated exposure of the magnets in each undulator. • Purpose A is of highest priority. BLM will be integrated into the Machine Protection System (MPS) and requires only limited dynamic range from the detectors. • Purpose B is also desirable for understanding long-term magnet damage in combination with the undulator exchange program but requires a large dynamic range for the radiation detector (order of 106 ) and much more sophisticated diagnostics hard and software. Source: HD Nuhn • Primary function of the BLM is to indicate to the MPS if losses exceed preset thresholds. • MPS processor will rate limit the beam according to which threshold was exceeded and what the current beam rate is.*Beam Current threshold determination? • The thresholds will be empirically determined by inserting a thin obstruction upstream of the undulator. • Simulation of losses and damage in the undulator will proceed in parallel with the present effort. Source: P Krejcik

  19. Beam Loss Monitor • Beam Line Detector: • Detailed and Assembly Drawings: • (engineering review and tolerancing). • Detector Head. • Detector BFW Mounting Bracket. • Undulator Motion Tracking Adapter.

  20. Interface Module Enclosure • Prototype design complete. • Prototype board and enclosures fabricated. • Final enclosure design in process (stenciling?) • Bench and beam based testing plan.

  21. Interface Module Girder Location

  22. Conclusions • Except for the Beam Loss Monitor all other components are in production • Items that have completed production • Vacuum Chamber • Vacuum Chamber Support • Beam Finder Wire Support • BPM Support • Items still in the process of production • BPM cavity - (20% complete) : Final Unit 7/16/08 • Beam Finder Wire - (8% complete) : Final Unit 6/3/08 • Quad Spool - (19% complete) : Final Unit 6/9/08 • Bellows Module - (21% complete) : Final Unit 5/23/08 • Long Break Spool and its support : Final Unit 6/18/08

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