BFW Card

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BFW Card

• Physics Requirements
• Status
• - BFW Card design
• - Carbon wire mounting and tooling
• BFW card alignment procedure

Clive Field, Reggie Rogers, Venkat Srinivasan
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BFW Card Physics Overview (PRD 1.4-004-r1)
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BFW Card Status
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BFW Wire Schematic (1.4-004-r1)
BFW Assembly Overview (J. Bailey)

• SLAC Deliverable
• BFW Card
• Detection mechanism
• Cabling
• 90 psi airline 24V solenoid controller

Assembly model courtesy J. Bailey, ANL
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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
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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

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BFW Card Alignment Plan

• 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.
• Cards alignment pin holes are slotted in
  horizontal direction.
• Cards horizontal position is verified/altered
  using shim/thickness gages.

Slide Fiducials
Vertical and Horizontal Adjustment Screws
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