Bob Lill LCLS FAC [email protected] June 16-18, 2008 RF BPM Status and Production Test...

Bob Lill

LCLS FAC meeting [email protected]

June 16-18, 2008

RF BPM Status and Production Test Results

Bob Lill


June 16-18, 2008

Cavity BPM Development

R&D 1st generation phase I cold test BPM

R&D 2nd generation phase II APS Injector Test Stand

First Article production design 3 BPM test Cold Test

1st GenerationITS Test

2nd Generation3-BPM TestFirst Article

Bob Lill


June 16-18, 2008

Comprehensive BPM Test Program

Non-Vacuum Single BPM cold test unit complete 04/06(Phase I) test in APS Injector Test Stand complete 09/06(Phase II) 3-BPM test in APS LEUTL completed 07/07Completed test matrix to prove compliance to specificationProduction phase ongoing

Bob Lill


June 16-18, 2008

4 mm Wide Scan Data without removing beam motion 0.2 nC

Bob Lill


June 16-18, 2008

Single-Shot Resolution Test Procedure

Use calibration to get a list of horizontal and vertical positions for each BPMCan do Model Independent Analysis (MIA) or Least Squares Analysis (LSA)Predict position at middle bpm (BPM 2) using horizontal and vertical positions at BPMs 1 and 3.Histogram the residuals for BPM 2 and standard deviation is the resolution

Bob Lill


June 16-18, 2008

3-BPM Test Apparent Y resolution Y = 270 nm

Courtesy Steve Smith

Bob Lill


June 16-18, 2008

3-BPM Test Apparent X resolution x = 360 nm

Courtesy Steve Smith

Bob Lill


June 16-18, 2008

1 Hour Stability Measurement

Courtesy Nick Sereno

Bob Lill


June 16-18, 2008

LTU and Undulator BPM System Conformance Table

Parameter Specification Limit

Measured Data (09/27/07)

Resolution < 1m

0.2 – 1.0 nC

+/- 1 mm range

< 0.6 m

Offset Stability < +/- 1m

1 hour

20.0 +/- 0.56 Celsius

< +/- 1m

Offset Stability < +/- 3m

24 hours

20.0 +/- 0.56 Celsius

<100 nm electronics test

20.0 +/- 0.56 Celsius

Gain Error < +/- 10 %

+/- 1 mm range

< 10 %

+/- 1 mm range

Dynamic Range, Position +/- 1 mm > +/- 1 mm

Dynamic Range, Intensity > 14 dB > 14 dB

Bob Lill


June 16-18, 2008

M1-Tool Works BPM Production

M1-Tool Works awarded contract for machining bodies and transitions for all 40 sets of parts

Production BPMs mechanically measured very good

Bob Lill


June 16-18, 2008

BPM process flow chart

Receive Parts from Vendor

InspectParts

Pass

Cold Test and Tune

ALTAIRBraze End Caps and flange cuffs

Vacuum Test Pass

ship to ANL

Transitions brazed and flanges

welded

Vacuum test

Pass

Cold test and Tune

Acceptance Test

Pass

Bake-out and final prep

Ship

Bob Lill


June 16-18, 2008

Cold Test Set-Up for Pre-Braze test

All BPMs are tuned and cold tested before brazing

Tuning accomplished by micro-machining end-caps

Good correlation between cold test data before and after braze

Bob Lill


June 16-18, 2008

Preparation Before First Braze

Average of 4 BPMs per week are pre-tuned and cold tested

30 BPMs cold tested and in process at this time

End Cap braze procedure works very nice for consistent electrical results

Pre-tune minimizes the need for further tuning after braze

Bob Lill


June 16-18, 2008

Cold Test Stations

2 network analyzers are set-up to support LCLS BPM production

Clean room procedures used when handling clean parts and assembles

All parts are carefully fitted and tuned before sending them to be brazed

Bob Lill


June 16-18, 2008

Cavity Production

Test method and procedures optimized for production

First few units required minimum tuning

Tuning design working well when needed

Good correlation from pre-tune data

Bob Lill


June 16-18, 2008

Tunable Cavity End Caps

End-cap design mechanically strengthen

Can retune once flange is installed

Tuner is protected against accidental mistuning

Bob Lill


June 16-18, 2008

Cavity Tuners

Bob Lill


June 16-18, 2008

Pre-Tuned Dipole Cavity

Bob Lill


June 16-18, 2008

Cavity BPM Production StatisticsS/N

Ship

date

Dipole Diameter

SPEC29.726 mm

+0,-15um

(mm)

Dipole Frequency

After

Pre-Tuning

(GHz)

Dipole Frequency

After final

Tune

11.384 GHz

+/- 10 MHz

(GHz)

Monopole Frequency

After

Pre-Tuning

(GHz)

Monopole Frequency After Final Tune

11.384 GHz

+/- 10 MHz

(GHz)

010

5/12

29.719 11.389 11.380 11.380 11.380

011

4/09

29.716 11.376 11.384 11.383 11.385

012

4/18

29.717 11.375 11.382 11.374 11.383

013

5/12

29.712 11.377 11.378 11.374 11.382

Bob Lill


June 16-18, 2008


Ship

date

Dipole Diameter

SPEC29.726 mm

+0,-15um

(mm)

Dipole Frequency

After

Pre-Tuning

(GHz)

Dipole Frequency

After final

Tune

11.384 GHz

+/- 10 MHz

(GHz)

Monopole Frequency

After

Pre-Tuning

(GHz)


11.384 GHz

+/- 10 MHz

(GHz)

014

4/18

29.714 11.379 11.385 11.371 11.382

015

5/07

29.712 11.374 11.381 11.372 11.383

016

5/07

29.712 11.382 11.394 11.377 11.389

017

5/12

29.712 11.377 11.382 11.372 11.380

Bob Lill


June 16-18, 2008


Ship

date

Dipole Diameter

SPEC29.726 mm

+0,-15um

(mm)

Dipole Frequency

After

Pre-tuning

(GHz)

Dipole Frequency

After final

Tune

11.384 GHz

+/- 10 MHz

(GHz)

Monopole Frequency

After

Pre-tuning

(GHz)


11.384 GHz

+/- 10 MHz

(GHz)

018

5/22

29.713 11.381 11.387 11.364 11.381

019

5/22

29.715 11.378 11.384 11.387 11.387

020

5/22

29.712 11.371 11.374 11.381 11.385

Bob Lill


June 16-18, 2008

Cavity BPM Production Milestones

1st BPM shipped 05/12/08

12 BPMs shipped date 06/06/08

Expect 13 BPMs to ship 07/01/08

Expect 13 BPMs to ship 08/01/08

Spares 08/08

Bob Lill


June 16-18, 2008

Receiver Electronics

1st generation Miteq standard product2nd generation bread board to support phase II APS Injector Test StandFirst Article production design

supported 3 BPM test

Bob Lill


June 16-18, 2008

Receiver Component Status

Most components received at this time

Sub assemblies being built

Test fixtures built

Bob Lill


June 16-18, 2008

Miteq Production Receiver Delivered

First Unit Received 4/11/08

Critical parameters checked meet specification

Received returned to Miteq to repair damage due to ANL test fixture over voltage condition

Miteq Receiver S/N 1369865 -Phase Locked- 4/14/08

-110.0

-100.0

-90.0

-80.0

-70.0

-60.0

-50.0

-40.0

-30.0

-20.0

-10.0

0.0

10.0

20.0

-125.0 -115.0 -105.0 -95.0 -85.0 -75.0 -65.0 -55.0 -45.0 -35.0 -25.0 -15.0 -5.0 5.0

RF Input Power (dBm)

IF O

utp

ut

Po

wer

(d

Bm

)

Ref (LG)

Horz (LG)

Vert (LG)

Ref (HG)

Horz (HG)

Vert (HG)

Gain Linearity

-1.00

-0.50

0.00

0.50

1.00

1.50

2.00

-140.0 -120.0 -100.0 -80.0 -60.0 -40.0 -20.0 0.0

Input (dB)

Gai

n (

dB

)

REF

HORZ

VERT

Bob Lill


June 16-18, 2008

Receiver Production Milestones

1st receiver ship date 06/12/08

8 receivers expected ship date 07/01/08



Bob Lill


June 16-18, 2008

Waveguide Kit

Waveguide has been received and QA checked

Expected Ship date 6/20/08

Bob Lill


June 16-18, 2008

BPM System Layout and Integration

X-band receiver LRU

Beam X-Band Cavity BPM

Horizontal

Attenuator/bandpass

filterLow Noise Ampl

Power Limiter

Lowpass Filter

IF Amplifier

Low Noise Ampl

Power Limiter

Low Noise Ampl

Power Limiter

LO Ampl

119 MHz Beam Synchronized

Reference

IN-TUNNEL ELECTRONICS

Ib

Reference cavity

Dipole cavity

40 MHz IF signals

To ADC

Attenuator/bandpass

filter

Attenuator/bandpass

filter

Termination

Vertical

Reference

Phase Locked Local oscillator

15 Volts/control I/O

11.424 GHz Local Oscillator

Power Distribution and Control

Vertical

Horizontal

Reference

Low Gain Bypass

Low Gain Bypass

Low Gain Bypass

Lowpass Filter

IF Amplifier

Lowpass Filter

IF Amplifier

Bob Lill


June 16-18, 2008

Risk Mitigation for Integration and Commissioning

Extensive System Testing

Installation of production hardware on long term test undulator

Qualified system with the same ADC (PAD) as SLAC LINAC BPM upgrade to minimize risk of integration

Successful collaborative effort testing and qualifying BPM system

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Bob Lill LCLS FAC [email protected] June 16-18, 2008 RF BPM Status and Production Test...

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