Undulator System Components Status Dean Walters

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

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

Graphical Display of Surface finish Data 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

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

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

Beam Finder Wire Repeatability Testing

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

RFBPM M1-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

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 Measurement LCLS BPM End Caps #1 LCLS BPM End Caps #2 RMS (nm) Sa (nm) PV (nm) 1 21.9 17.3 411 45.7 30.6 2066 2 23.5 18.6 659 48.6 32.5 1898 3 23.6 18.9 548 43.0 29.4 1674 4 23.9 18.7 433 47.9 33.2 1880 Average 23.2 18.4 513 46.3 31.4

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.

Parts Stored in Dry Nitrogen Box

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.

Cavity BPM Production Statistics S/N Ship date Diameter SPEC 29.726 mm +0, -15um Frequency Before tuning After Pre-tuning After final Braze Tuning 11.384 GHz +/- 10 MHz Q loaded 010 29.719 mm 11.393 GHz 11.389 GHz In-process 011 4/09 29.716 mm 11.391 GHz 11.376 GHz 11.389 GHz 3035 012 4/18 29.717 mm 11.394 GHz 11.375 GHz 11.387 11.382 3308 013 29.712 mm 11.397 GHz 11.377 GHz

First Production Unit Shipped to SLAC

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

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

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 Source: P Krejcik 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.

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

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

Interface Module Girder Location

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