facility advisory committee bfw calibration test results

Venkat SrinivasanFAC: BFW Test Update [email protected]

06/17/2008 1

Facility Advisory CommitteeBFW Calibration Test Results

on behalf of:

Jim BaileyKeith Caban

Clive FieldGeovanni Gordon

Tom NakashimaDanny Peterswright

Reggie RogersDonald Schafer

Yung-Yung Sung


06/17/2008 2

BFW Assembly Mounted on Adjustable Support

Adjustable Mounting Support

(Modified since) Vacuum Pump Connector (2.75” Conflat Flange)

Card Position Monitor (Limit switches)

Air Supply Shut Off Valve

Pneumatic Solenoid Valve

Precision Screw

Electrical Connectors for Wire Signals

Vacuum Chamber Connection Flange

(NW-50 CeFix w/Clamp)

Beam Port

Pneumatic Cylinder

Alignment Fiducials

Frame

Compression Spring Positioner

Potentiometer

Housing

Assembly model courtesy: J. Bailey, ANL


06/17/2008 3

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 >2 mm >2 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]


06/17/2008 4

Task Status/Dates (6/17/08)

Delivery of BFW assemblies from ANL11 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 cards7 BFW cards fabricated, cleaned and coated. Waiting to be wired if needed.

BFW: Alignment & Assembly Status


06/17/2008 5

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)


06/17/2008 6

BFW Card Prototype DrawingPrototype material: Al-6061Actual material: MacorThickness: 3/16” (4.8 mm)Coating: Kovar [tooling in progress]

X-wire end point: 39.614 mmBeam center: 40 mmGap between beam and X-wire: 0.386 mm

Y-wire end point: 37.014 mmBeam center: 37.2 mmGap between beam and Y-wire: 0.186 mm

Courtesy: C. Field, R. Rogers


06/17/2008 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 shieldedCourtesy: C. Field, Y.Sung


06/17/2008 8

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


06/17/2008 9

BFW Alignment Procedure (in Vacuum)

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

QC Instruction List


06/17/2008 10

BFW Test: Sample ‘Good’ Data, BFW #7

All Data, courtesy: SLAC QC, E. Lundahl, K. Caban, T. Nakashima

X (<65)

Y (<30)

Wire 19 1

TB5 4 9

TB6 4 10

TB7 3 3

TB8 1 8


06/17/2008 11

BFW Test: Sample ‘Bad’ Data - old design of BFW #2

X (<65)

Y (<30)

Card Position (before vacuum)

141 156

TB5 31 78

TB6 32 88

TB7 18 75

TB8 18 18


06/17/2008 12

BFW Test: Sample Data, BFW #12Vacuum Test 1

Measurement Method:• Under Vacuum• 200 cycles, 10 measurements, Random sampling

• Relaxation time between cycles: ~ 1 second

X (<65) Y (<30)

Wire 145 15

TB5 33 76

TB6 33 52

TB7 41 15

TB8 41 55


06/17/2008 13

BFW Test: Sample Data, BFW #12Vacuum Test 2

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

X (<65) Y (<30)

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

Measurement Method:• Under Vacuum• Another 10 cycles, 10 measurements, Consecutive sampling

• Relaxation time between cycles: ~ 1 minute


06/17/2008 14

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


06/17/2008 15

¼-20-UNC Screws 1 and 2

¼-20-UNC Screws 3 and 4

This precision screw remains fixed

Socket head screw loosens and tightens collar on precision screws

Socket head for adjusting the precision screws

Top View

X-Precision Screws. Do not touch

Y-Precision Screws 10, 11, and 12

¼-20-UNC Screws 5, 6 and 7 (Brass washers under heads are not

shown)



06/17/2008 16

BFW Assembly (Body Sectioned) Wire Card Down in Inactive Mode

Wire card(Down Position)

Lower Limit Switch(Actuated Position)

Pneumatic Solenoid Valve(Cylinder Vent Position)

Internal Return Spring(Expanded Position)

Electrical Connectors(Down Position)

Internal Kinematic Stop Plates

(Open Position)

Bellows Seal(Compressed Position)

BEAM

Potentiometer (Out Position)


facility advisory committee bfw calibration test results

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