Facility Advisory Committee BFW Calibration Test Results

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Facility Advisory CommitteeBFW Calibration Test
Results
on behalf of Jim Bailey Keith Caban Clive
Field Geovanni Gordon Tom Nakashima Danny
Peterswright Reggie Rogers Donald Schafer
Yung-Yung Sung
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BFW Assembly Mounted on Adjustable Support
Electrical Connectors for Wire Signals
Potentiometer
Pneumatic Solenoid Valve
Compression Spring Positioner
Air Supply Shut Off Valve
Precision Screw
Card Position Monitor (Limit switches)
Frame
Housing
Alignment Fiducials
(Modified since) Vacuum Pump Connector (2.75
Conflat Flange)
Pneumatic Cylinder
Vacuum Chamber Connection Flange (NW-50 CeFix
w/Clamp)
Adjustable Mounting Support
Beam Port
Assembly model courtesy J. Bailey, ANL
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BFW Card Physics Overview (PRD 1.4-004-r1)
Parameter Value Status
Wires per BFW device 2 2
Wire perpendicularity 10 mrad 1 mrad (early microscope test on prototype)
Wire diameter 0.03-0.04 mm 0.0345-0.0413 mm Carbon wires.
Vertical position of Y-wire from Girder Axis (GA) 0.20 mm 0.1899 mm Sample average, BFW 7
Horizontal position of X-wire from GA 0.40 mm 0.412 mm Sample average, BFW 7
Vacuum hardware clearance radius at target gt2 mm gt2 mm
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 reproducibility 30 µm 1 µm Sample RMS, BFW 7
X-wire horizontal insertion reproducibility 65 µm 19 µm Sample RMS, BFW 7
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BFW Alignment Assembly Status
Task Status/Dates (6/17/08)
Delivery of BFW assemblies from ANL 11 revised design BFWs received at SLAC (2 old design). 2 more shipped as of 6/9/08
Fabrication of Bench Assembly for SLAC Alignment of BFW Used for alignment of BFWs
BFW electrical connections Electrical connections, ground connectors and RF shields All RFI
Fabrication of 40 BFW cards (Macor) RFI
BFW Card Coating Kovar (40 pieces) RFI
BFW Card Wiring Carbon wire, 40 pieces RFI
BFW Card Installation and alignment RFI
BFW Assembly Pneumatics Boxes Put in system by P. Cutino for 33 BFW
90 psi airline Put 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.
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BFW Alignment Assembly Status
Shipped from Argonne Total Received at SLAC In Transit RFI QC Testing in process Awaiting QC Awaiting retesting Old design BFWs
15 13 2 (16,17) 7 (4,5,6,9,7,12,29) 1 (24) 2 (15,32) 1 (13) 2 (1,2)
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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
Courtesy C. Field, R. Rogers
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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

Courtesy C. Field, Y.Sung
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BFW Alignment Procedure at SLAC(outside Vacuum)

• Coordinate system definition
• Wire card positioning and alignment
• Transformation Factor from BFW tooling balls ?
  wire card

QC Instruction List
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BFW Alignment Procedure (in Vacuum)

• Wire position found using TB values
• Repeatability check
• Wire position check in virtual beamline
  coordinate system

QC Instruction List
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BFW Test Sample Good Data, BFW 7
X (lt65) Y (lt30)
Wire 19 1
TB5 4 9
TB6 4 10
TB7 3 3
TB8 1 8
All Data, courtesy SLAC QC, E. Lundahl, K.
Caban, T. Nakashima
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BFW Test Sample Bad Data - old design of BFW 2
X (lt65) Y (lt30)
Card Position (before vacuum) 141 156
TB5 31 78
TB6 32 88
TB7 18 75
TB8 18 18
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BFW Test Sample Data, BFW 12Vacuum Test 1
X (lt65) Y (lt30)
Wire 145 15
TB5 33 76
TB6 33 52
TB7 41 15
TB8 41 55

• Measurement Method
• Under Vacuum
• 200 cycles, 10 measurements, Random sampling
• Relaxation time between cycles 1 second

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BFW Test Sample Data, BFW 12Vacuum Test 2
X (lt65) Y (lt30)
ANL Wire Position Repeatability Test (100 cycles) 12 2
SLAC Wire Position (10 cycles) 31 3
TB5 19 22
TB6 18 16
TB7 11 6
TB8 11 15

• BFW 12 RFI-ed
• Tested for repeatability at ANL (All units are
  tested at ANL)
• Wire position verified at SLAC
• Wire repeatability verified with delayed cycles
  (small sample size) at SLAC
• SLAC Procedure to calibrate devices using small
  sample size delayed cycle measurement

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BFW Status Reminder
Shipped from Argonne Total Received at SLAC In Transit RFI QC Testing in process Awaiting QC Awaiting retesting Old design BFWs
15 13 2 (16,17) 7 (4,5,6,9,7,12,29) 1 (24) 2 (15,32) 1 (13) 2 (1,2)
Process Time per Assembly 1 day
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Y-Precision Screws 10, 11, and 12
¼-20-UNC Screws 5, 6 and 7 (Brass washers under
heads are not shown)
X-Precision Screws. Do not touch
Assembly model courtesy J. Bailey, ANL
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BFW Assembly (Body Sectioned) Wire Card Down in
Inactive Mode
Potentiometer (Out Position)
Electrical Connectors (Down Position)
Internal Return Spring (Expanded Position)
Internal Kinematic Stop Plates (Open Position)
Pneumatic Solenoid Valve (Cylinder Vent Position)
Lower Limit Switch (Actuated Position)
Bellows Seal (Compressed Position)
Wire card (Down Position)
BEAM
Assembly model courtesy J. Bailey, ANL