View
36
Download
0
Category
Preview:
DESCRIPTION
LCLS Cavity BPM Status and Testing. In-Tunnel Electronics Block Diagram. Cavity BPM Development. R&D phase completed Testing phase II completed Entering production phase. 3-BPM Test First Article. Cold Test 1st Generation. ITS Test 2nd Generation. X-Band Cavity BPM Development. - PowerPoint PPT Presentation
Citation preview
Bob Lill
FAC meeting Cavity BPM Blill@aps.anl.gov
October 30, 2007
LCLS Cavity BPM Status and Testing
Bob Lill
FAC meeting Cavity BPM Blill@aps.anl.gov
October 30, 2007
In-Tunnel Electronics Block Diagram
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
FAC meeting Cavity BPM Blill@aps.anl.gov
October 30, 2007
Cavity BPM Development
R&D phase completed
Testing phase II completed
Entering production phase Cold Test
1st GenerationITS Test
2nd Generation
3-BPM TestFirst Article
Bob Lill
FAC meeting Cavity BPM Blill@aps.anl.gov
October 30, 2007
X-Band Cavity BPM Development
Five X-Band Cavity BPM built and tested
Two qualified vendors for machined parts
Brazing procedure optimized to preserve tune
Tuning and testing procedures generated
Bob Lill
FAC meeting Cavity BPM Blill@aps.anl.gov
October 30, 2007
BPM Simulations
Cavity BPMs simulated in Microwave Studio, HFSS and Mafia
Test data indicates good agreement between simulated model and measured BPMs
Port 1
Port 4
Port 2
Port 3
X-Port
Y-Port
Vertical dipole mode
Monopole mode
Bob Lill
FAC meeting Cavity BPM Blill@aps.anl.gov
October 30, 2007
Prototype BPMs for 3-BPM test
4 BPMs built and tested to support 3-BPM testing
Design and technology mature
Bob Lill
FAC meeting Cavity BPM Blill@aps.anl.gov
October 30, 2007
Cold Test After Brazing and Tuning
Serial # Dipole Freq. (GHz)
DipoleLoaded Q
MonopoleFreq. (GHz)
MonopoleLoaded Q
Design Goal 11.384 3550 11.384 3695
R/0 11.384 3310 11.384 3437
001 11.374 3250 11.382 3372
002 11.376 3500 11.383 3436
003 11.377 3371 11.400 3200
Bob Lill
FAC meeting Cavity BPM Blill@aps.anl.gov
October 30, 2007
New End Cap
End-cap design mechanically strengthen
Can retune once flange is installed
Tuning pins are protected against accidental mistuning
New end-cap designed and tested
Vacuum flange test prototype pending
Bob Lill
FAC meeting Cavity BPM Blill@aps.anl.gov
October 30, 2007
Cavity BPM Production Status
Cavity BPM machining contracts placed with parts expected 11/27/07
Two vendors will provide a single machined First Article BPM for evaluation
Vacuum window first lot delivery 11/12/07
Vendor for brazing BPM pending contract award
Bob Lill
FAC meeting Cavity BPM Blill@aps.anl.gov
October 30, 2007
Receiver Electronics Development
R&D phase complete
Test fixtures developed
Entering production phase
Bob Lill
FAC meeting Cavity BPM Blill@aps.anl.gov
October 30, 2007
Receiver Development
X-Band down-converter developed from existing Miteq product Modified to meet LCLS requirements3 channel receiver with common LO4 first article packaged receivers delivered and presently being tested
Bob Lill
FAC meeting Cavity BPM Blill@aps.anl.gov
October 30, 2007
Prototype Receiver Specification
Parameter Specification Limit
Condition
RF Frequency 11.384 GHz 20.0 +/- 0.56 Celsius
Dx, Dy, Intensity
Input Peak Power 50 watts peak No damage (limiter protection)
LO Frequency 11.424 GHz
(2856 MHz*4)
20.0 +/- 0.56 Celsius
1nC, 1mm offset, 200fs BL
LO Power Range +10 dBm Max. Provide LO for 3 down converters
IF Frequency 40 MHz Min. 20.0 +/- 0.56 Celsius
Noise Figure Dx and DY 3.2 dB Max. 20.0 +/- 0.56 Celsius
Noise Figure Intensity (reference) 4.0 dB Max. 20.0 +/- 0.56 Celsius
Output Power +14 dBm 1 dB compression
Conversion Gain 28 dB typical 20.0 +/- 0.56 Celsius
Low Gain Mode Conversion Gain 0 dB typical Extends range by 24 dB
Bob Lill
FAC meeting Cavity BPM Blill@aps.anl.gov
October 30, 2007
X-Band Receiver Chassis
Line Replaceable Unit (LRU) design
Local status interface indicators for power, operational mode, gain range, self-test
Integral heat sink and EMI chassis design
Bob Lill
FAC meeting Cavity BPM Blill@aps.anl.gov
October 30, 2007
Receiver Production Status
Drawings updated and released
Specifications generated on receiver, local oscillation and filters
Vendor selection same as 3-BPM first article
Presently quoting production quantities
Bob Lill
FAC meeting Cavity BPM Blill@aps.anl.gov
October 30, 2007
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 test matrix to prove compliance to specificationProduction phase started
Bob Lill
FAC meeting Cavity BPM Blill@aps.anl.gov
October 30, 2007
3-BPM Test at APS LEUTL
2-axis translation stage installed and tested provide sub-micron controllable horizontal and vertical motion
Multiple experiments conducted to verify operation
Bob Lill
FAC meeting Cavity BPM Blill@aps.anl.gov
October 30, 2007
Test Parameters
Beam Energy – 400 MeVBeam Charge/pulse – 0.2 to 0.5 nCBeam Repetition Rate – 6 HzBeam Pulse Width – 2 ps FWTM (uncompressed)Diagnostics:
LEUTL current monitorFlags upstream and downstream of test setup
Quad doublet focusing/steering upstream of test setup
Bob Lill
FAC meeting Cavity BPM Blill@aps.anl.gov
October 30, 2007
4 mm Wide Scan Data without removing beam motion 0.2 nC
Bob Lill
FAC meeting Cavity BPM Blill@aps.anl.gov
October 30, 2007
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
FAC meeting Cavity BPM Blill@aps.anl.gov
October 30, 2007
Histogram residuals for BPM 2
Courtesy Nick Sereno
Bob Lill
FAC meeting Cavity BPM Blill@aps.anl.gov
October 30, 2007
3-BPM Test Apparent Y resolution Y = 270 nm
Courtesy Steve Smith
Bob Lill
FAC meeting Cavity BPM Blill@aps.anl.gov
October 30, 2007
3-BPM Test Apparent X resolution x = 360 nm
Courtesy Steve Smith
Bob Lill
FAC meeting Cavity BPM Blill@aps.anl.gov
October 30, 2007
1 Hour Stability Measurement
Courtesy Nick Sereno
Bob Lill
FAC meeting Cavity BPM Blill@aps.anl.gov
October 30, 2007
Long Term Electronics Stability Testing
Bob Lill
FAC meeting Cavity BPM Blill@aps.anl.gov
October 30, 2007
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
FAC meeting Cavity BPM Blill@aps.anl.gov
October 30, 2007
LCLS Three-BPM Test Conclusions
Resolution spec met
Long term drift spec for 1 hour spec met
Gain stability spec met
1 hour temperature stability spec met
24 hour temperature stability spec met electronics with simulated beam
Bob Lill
FAC meeting Cavity BPM Blill@aps.anl.gov
October 30, 2007
Undulator System Layout
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
FAC meeting Cavity BPM Blill@aps.anl.gov
October 30, 2007
Undulator System Layout
Bob Lill
FAC meeting Cavity BPM Blill@aps.anl.gov
October 30, 2007
LTU System Layout
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
FAC meeting Cavity BPM Blill@aps.anl.gov
October 30, 2007
Deliverables per BPM
1 Cavity BPM assembly
1 X-band receiver
3 Waveguides and 2 loads with assembly hardware
1 Receiver mounting hardware assembly
1 BPM mounting stage
Bellows and finger inserts
Bob Lill
FAC meeting Cavity BPM Blill@aps.anl.gov
October 30, 2007
Production Milestones
Production of 2 BPMs for LTU 01/08
Production of 6 BPMs for undulator 02/08
Production of 10 BPMs for undulator 03/08
Production of 11 BPMs for undulator 04/08
Production of 7 BPMs for undulator 05/08
Spares 4 BPMs 05/08
40 sets of Electronics 07/08
Bob Lill
FAC meeting Cavity BPM Blill@aps.anl.gov
October 30, 2007
Summary
X-Band Cavity BPMDevelopment phase complete Production procurement in placeFirst machined production units expected in November
Receiver Electronics4 First article prototypes assembled and tested with good results3-BPM testing prototypes incorporate receiver, local oscillator and filter first article packagingProduction procurement ongoing
Test QualificationSuccessful collaborative effort testing and qualifying BPM system Qualified system with the same ADC (PAD) as SLAC LINAC BPM upgrade to minimize risk of integration
Bob Lill
FAC meeting Cavity BPM Blill@aps.anl.gov
October 30, 2007
Production Risks
New End Cap design
New tuning scheme
Window plating problem
Unexpected integration problem
Unexpected vendor problem
Recommended