BFW Card Mounting and Alignment Requirements for Physics Experiment

1. BFW Card Physics Requirements Status - BFW Card design - Carbon wire mounting and tooling BFW card alignment procedure Clive Field, Reggie Rogers, Venkat Srinivasan

2. BFW Card: Physics Overview (PRD 1.4-004-r1)

3. BFW Card: Status

4. BFW Assembly Overview (J. Bailey) BFW Wire Schematic (1.4-004-r1) • SLAC Deliverable: • BFW Card • Detection mechanism • Cabling • 90 psi airline; 24V solenoid controller Assembly model courtesy: J. Bailey, ANL

5. BFW Card Prototype Drawing X-wire end point: 39.614 mm Beam center: 40 mm Gap between beam and X-wire: 0.386 mm Prototype material: Al-6061 Actual material: Macor Thickness: 3/16” (4.8 mm) Coating: Kovar [tooling in progress] Y-wire end point: 37.014 mm Beam center: 37.2 mm Gap between beam and Y-wire: 0.186 mm

6. BFW Card Wiring: Tooling Micrometer stage BFW Card Rods for hanging BFW wire with weights Card holder ‘Carbon wire & weight’ Copper Tabs • Wires soldered to copper tabs • Wires from copper tabs connect to BFW feedthrough • Feedthrough to be grounded and RF shielded

7. BFW Card: Alignment Plan Slide Fiducials Vertical and Horizontal Adjustment Screws • Place BFW assembly on bench assembly using flange locating pins • Bench assembly locates on CMM • Locate wires to local fiducials (card edges and hole) – optically. • 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. Flange Locating Pins Pneumatic supply Bench Fiducials Adjustment Bench located on CMM Wire Card Fiducials are edges of card and additional hole at bottom of card Use shim/thickness gages to measure gap between card holder and card Assembly model courtesy: J. Bailey, ANL