1. Clive Field, Venkat Srinivasan Undulator Week: BFW Card Status Update venkats@slac.stanford.edu 04/30/2008 1 BFW Card Status on behalf of: Keith Caban Clive Field Geovanni Gordon Tom Nakashima Danny Peterswright Reggie Rogers Yung-Yung Sung

2. Clive Field, Venkat Srinivasan Undulator Week: BFW Card Status Update venkats@slac.stanford.edu 04/30/2008 2 Task Status/Dates (from 1/23/2008) Status/Dates (4/29/08) Delivery of BFW assemblies from ANL1 st article to ship from ANL in early 2008 1 revised assembly received from ANL on 4/28/08. Two older design BFWs received earlier and to be sent back. Fabrication of Bench Assembly for SLAC Alignment of BFWSLAC: Ready 1/25/08Fabricated and used for alignment of BFW BFW electrical connections SLAC: To do copper tabs testing on prototype, feedthrough RF shielding Electrical Connections - RFI. Feedthrough RF shielding after BFW tests. Detector – PMT assemblySLAC: Start Feb 2008 (D. McCormick)No change (non-vacuum component) Fabrication of 40 BFW cards (Macor)SLAC: 1 st article ready for tests: 1/23/08.RFI BFW Card Coating – Kovar (40 pieces) SLAC: Start 01/28/08. Delayed due to tooling, Macor delivery, modifications. RFI BFW Card Wiring – Carbon wire, 40 piecesSLAC: Start 01/30/08RFI BFW Card Installation and alignmentSLAC: Start 02/11/08RFI BFW Assembly Pneumatics BoxesNeed pressure regulator in systemPut in system by P. Cutino for 33 BFW 90 psi airlineSLAC: Instrumentation. Start 02/04/08Put in system by P. Cutino for 33 BFW BFW Additional non-wired cards- 7 BFW cards fabricated, cleaned and coated. Waiting to be wired if needed. BFW Card: Status

3. Clive Field, Venkat Srinivasan Undulator Week: BFW Card Status Update venkats@slac.stanford.edu 04/30/2008 3 BFW Card : Old Slides

4. Clive Field, Venkat Srinivasan Undulator Week: BFW Card Status Update venkats@slac.stanford.edu 04/30/2008 4 BFW Card: Physics Overview (PRD 1.4-004-r1) ParameterValueStatus Wires per BFW device22 Wire perpendicularity10 mrad ~1 mrad (early microscope test on prototype) Wire diameter0.03-0.04 mm0.034 Carbon wires Vertical position of Y-wire from Girder Axis (GA)0.20 mm0.186 mm [Slide 5] Horizontal position of X-wire from GA0.40 mm0.386 mm [Slide 5] Vacuum hardware clearance radius at target>2 mm>2 mm. [Slide 5] Two independent methods to measure beam intensity at wire location: (1) beam induced wire current (2) Scattered particles NA Only scattered particle detection in plan Y-wire vertical insertion reproducibility30 µm Dependent on overall BFW Assembly Alignment X-wire horizontal insertion reproducibility80 µm Dependent on overall BFW Assembly Alignment Roll, pitch, yaw tolerance10 mrad Dependent on overall BFW Assembly Alignment

5. Clive Field, Venkat Srinivasan Undulator Week: BFW Card Status Update venkats@slac.stanford.edu 04/30/2008 5 BFW Wire Schematic (1.4-004-r1) BFW Assembly Overview (J. Bailey) Assembly model courtesy: J. Bailey, ANL SLAC Deliverable: 1.BFW Card 2.Detection mechanism 3.Cabling 4.90 psi airline; 24V solenoid controller

6. Clive Field, Venkat Srinivasan Undulator Week: BFW Card Status Update venkats@slac.stanford.edu 04/30/2008 6 BFW Card Prototype Drawing Prototype material: Al-6061 Actual material: Macor Thickness: 3/16” (4.8 mm) Coating: Kovar [tooling in progress] X-wire end point: 39.614 mm Beam center: 40 mm Gap between beam and X-wire: 0.386 mm Y-wire end point: 37.014 mm Beam center: 37.2 mm Gap between beam and Y-wire: 0.186 mm

7. Clive Field, Venkat Srinivasan Undulator Week: BFW Card Status Update venkats@slac.stanford.edu 04/30/2008 7 BFW Card Wiring: Tooling Copper Tabs Rods for hanging BFW wire with weights Micrometer stage BFW Card Card holder ‘Carbon wire & weight’ Wires soldered to copper tabs Wires from copper tabs connect to BFW feedthrough Feedthrough to be grounded and RF shielded

8. Clive Field, Venkat Srinivasan Undulator Week: BFW Card Status Update venkats@slac.stanford.edu 04/30/2008 8 BFW Card: Alignment Plan Assembly model courtesy: J. Bailey, ANL 1.Place BFW assembly on bench assembly using flange locating pins 2.Bench assembly locates on CMM 3.Locate wires to local fiducials (card edges and hole) – optically. 4.Locate local fiducials to outside tooling balls – using CMM. -Card’s alignment pin holes are slotted in horizontal direction. -Card’s horizontal position is verified/altered using shim/thickness gages. Adjustment Bench located on CMM Bench Fiducials Flange Locating Pins Pneumatic supply Slide Fiducials Wire Card Fiducials are edges of card and additional hole at bottom of card Vertical and Horizontal Adjustment Screws Use shim/thickness gages to measure gap between card holder and card