Slide 1 - Stanford Synchrotron R by fjzhxb

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									Facility Advisory Committee BFW 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 06/17/2008 FAC: BFW Test Update 1
Venkat Srinivasan venkats@slac.stanford.edu

BFW Assembly Mounted on Adjustable Support
Electrical Connectors for Wire Signals Compression Spring Positioner Air Supply Shut Off Valve Precision Screw Frame Alignment Fiducials Pneumatic Cylinder Vacuum Chamber Connection Flange (NW-50 CeFix w/Clamp)
Assembly model courtesy: J. Bailey, ANL 06/17/2008 FAC: BFW Test Update

Potentiometer Pneumatic Solenoid Valve

Card Position Monitor (Limit switches) Housing (Modified since) Vacuum Pump Connector (2.75” Conflat Flange)

Beam Port
2

Adjustable Mounting Support
Venkat Srinivasan venkats@slac.stanford.edu

BFW Card: Physics Overview (PRD 1.4-004-r1)
Parameter
Wires per BFW device Wire perpendicularity Wire diameter Vertical position of Y-wire from Girder Axis (GA) Horizontal position of X-wire from GA Vacuum hardware clearance radius at target Two independent methods to measure beam intensity at wire location: (1) beam induced wire current (2) Scattered particles Y-wire vertical insertion reproducibility X-wire horizontal insertion reproducibility

Value
2 10 mrad 0.03-0.04 mm 0.20 mm 0.40 mm >2 mm NA 30 µm 65 µm

Status
2 ~1 mrad (early microscope test on prototype) 0.0345-0.0413 mm Carbon wires. 0.1899 mm [Sample average, BFW #7] 0.412 mm [Sample average, BFW #7] >2 mm Only scattered particle detection in plan 1 µm [Sample RMS, BFW #7] 19 µm [Sample RMS, BFW #7]

06/17/2008 FAC: BFW Test Update

3

Venkat Srinivasan venkats@slac.stanford.edu

BFW: Alignment & Assembly Status
Task
Delivery of BFW assemblies from ANL Fabrication of Bench Assembly for SLAC Alignment of BFW BFW electrical connections Fabrication of 40 BFW cards (Macor) BFW Card Coating – Kovar (40 pieces) BFW Card Wiring – Carbon wire, 40 pieces BFW Card Installation and alignment BFW Assembly Pneumatics Boxes 90 psi airline BFW Additional non-wired cards

Status/Dates (6/17/08)
11 revised design BFWs received at SLAC (+2 old design). 2 more shipped as of 6/9/08 Used for alignment of BFWs Electrical connections, ground connectors and RF shields: All RFI RFI RFI RFI RFI Put in system by P. Cutino for 33 BFW Put in system by P. Cutino for 33 BFW 7 BFW cards fabricated, cleaned and coated. Waiting to be wired if needed.

06/17/2008 FAC: BFW Test Update

4

Venkat Srinivasan venkats@slac.stanford.edu

BFW: Alignment & Assembly Status

Shipped from Argonne 15

Total Received at SLAC 13

In Transit 2 (#16,17)

RFI

QC Testing in process 1 (#24)

Awaiting QC 2 (#15,32)

Awaiting retesting 1 (#13)

Old design BFWs 2 (#1,2)

7 (#4,5,6,9,7,12,29)

06/17/2008 FAC: BFW Test Update

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Venkat Srinivasan venkats@slac.stanford.edu

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

Courtesy: C. Field, R. Rogers

06/17/2008 FAC: BFW Test Update

6

Venkat Srinivasan venkats@slac.stanford.edu

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
Venkat Srinivasan venkats@slac.stanford.edu

Courtesy: C. Field, Y.Sung

06/17/2008 FAC: BFW Test Update

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 FAC: BFW Test Update

8

Venkat Srinivasan venkats@slac.stanford.edu

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 FAC: BFW Test Update 9
Venkat Srinivasan venkats@slac.stanford.edu

BFW Test: Sample ‘Good’ Data, BFW #7
X (<65) Y (<30)

Wire
TB5 TB6 TB7 TB8

19
4 4 3 1

1
9 10 3 8

All Data, courtesy: SLAC QC, E. Lundahl, K. Caban, T. Nakashima 06/17/2008 FAC: BFW Test Update 10
Venkat Srinivasan venkats@slac.stanford.edu

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

X (<65) Card Position (before vacuum) TB5 TB6 TB7 141

Y (<30) 156

31 32 18

78 88 75

TB8

18

18

06/17/2008 FAC: BFW Test Update

11

Venkat Srinivasan venkats@slac.stanford.edu

BFW Test: Sample Data, BFW #12 Vacuum Test 1
X (<65) Wire TB5 TB6 TB7 TB8 145 33 33 41 41 Y (<30) 15 76 52 15 55

Measurement Method: • Under Vacuum • 200 cycles, 10 measurements, Random sampling • Relaxation time between cycles: ~ 1 second 06/17/2008 FAC: BFW Test Update

12

Venkat Srinivasan venkats@slac.stanford.edu

BFW Test: Sample Data, BFW #12 Vacuum Test 2
X (<65) ANL Wire Position Repeatability Test (100 cycles) SLAC Wire Position (10 cycles) TB5 12 31 19 Y (<30) 2 3 22

TB6
TB7 TB8

18
11 11

16
6 15

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

• Relaxation time between cycles: ~ 1 minute

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

06/17/2008 FAC: BFW Test Update

13

Venkat Srinivasan venkats@slac.stanford.edu

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 FAC: BFW Test Update

14

Venkat Srinivasan venkats@slac.stanford.edu

Top View
¼-20-UNC Screws 1 and 2 Y-Precision Screws 10, 11, and 12

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

¼-20-UNC Screws 3 and 4

This precision screw remains fixed Socket head screw loosens and tightens collar on precision screws

X-Precision Screws. Do not touch

Socket head for adjusting the precision screws

Assembly model courtesy: J. Bailey, ANL 06/17/2008 FAC: BFW Test Update 15
Venkat Srinivasan venkats@slac.stanford.edu

BFW Assembly (Body Sectioned) Wire Card Down in Inactive Mode
Electrical Connectors (Down Position) Potentiometer (Out 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) BEAM
Assembly model courtesy: J. Bailey, ANL 06/17/2008 FAC: BFW Test Update 16

Wire card (Down Position)
Venkat Srinivasan venkats@slac.stanford.edu


								
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