Undulator Cavity BPM Status October 12 2006 Undulator

Undulator Cavity BPM Status October 12, 2006 Undulator Systems – Cavity BPM Status Bob Lill Blill@aps. anl. gov

Design Review Outline BPM System Design Overview Cavity Design Electronics and ADC Current status for phase I prototype testing Planning phase II prototype test First article and production October 12, 2006 Undulator Systems – Cavity BPM Status Bob Lill Blill@aps. anl. gov

LTU and Undulator BPM System Specification Parameter Specification Limit Condition Resolution < 1 m 0. 2 – 1. 0 n. C +/- 1 mm range Offset Stability < +/- 1 m 1 hour +/- 1 mm range 20. 0 +/- 0. 56 Celsius Offset Stability < +/- 3 m 24 hours +/- 1 mm range 20. 0 +/- 0. 56 Celsius Gain Error < +/- 10 % +/- 1 mm range 20. 0 +/- 0. 56 Celsius Dynamic Range, Position +/- 1 mm 10 mm diameter vacuum chamber Dynamic Range, Intensity > 14 d. B PC Gun 0. 2 – 1. 0 n. C October 12, 2006 Undulator Systems – Cavity BPM Status Bob Lill Blill@aps. anl. gov

BPM System Overview Block Diagram October 12, 2006 Undulator Systems – Cavity BPM Status Bob Lill Blill@aps. anl. gov

X-Band Cavity BPM Design Each BPM has position cavity and reference cavity SLAC selective coupling design utilized to reduce monopole mode Iris couplers are precisely EDM into Solid Copper Body Waveguide transition brazed to body October 12, 2006 Undulator Systems – Cavity BPM Status Bob Lill Blill@aps. anl. gov

Cold Test Prototype Non-vacuum cold test prototype Accelerated design verification and cold test development Removable end caps Presently used to verify tuning effects and test fixture development October 12, 2006 Undulator Systems – Cavity BPM Status Bob Lill Blill@aps. anl. gov

Before and After Brazing (ITS Prototype) October 12, 2006 Undulator Systems – Cavity BPM Status Bob Lill Blill@aps. anl. gov

Prototype Cold Test (Dipole cavity 500 micron offset) Parameter (500 µm offset) Frequency TM 010 Predicted Measured Prototype # 1 bolted end caps Measured Prototype # 2 brazed end caps 8. 262 GHz 8. 271 GHz 8. 243 GHz -53 d. B -69 d. B -62 d. B 11. 364 GHz 11. 344 GHz 11. 357 GHz -32 d. B -28 d. B -24 d. B Q (loaded) TM 110 2704 2086 2391 X/Y Isolation TM 110 -26 d. B -33 d. B -23 d. B Dipole to Monopole cavity Isolation <-80 d. B <-85 d. B <-89 d. B 15. 825 GHz 15. 767 GHz 15. 785 GHz -78 d. B -64 d. B -50 d. B Coupling TM 010 Frequency TM 110 Coupling TM 110 Frequency TM 020 Coupling TM 020 October 12, 2006 Undulator Systems – Cavity BPM Status Bob Lill Blill@aps. anl. gov

Baseline Design for Phase I Prototype Miteq X-Band Low Noise Receiver Existing product line WR 75 Waveguide Interface Low Noise Figure (2. 7 d. B) Budgetary price for (3 channels) $6500. 00 October 12, 2006 Undulator Systems – Cavity BPM Status Bob Lill Blill@aps. anl. gov

Prototype Receiver Specification Parameter Specification Limit Condition RF Frequency 11. 364 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 1 n. C, 1 mm offset, 200 fs BL LO Power Range +10 d. Bm Max. Provide LO for 3 down converters IF Frequency 60 MHz Min. 20. 0 +/- 0. 56 Celsius Noise Figure Dx and DY 2. 7 d. B Max. 20. 0 +/- 0. 56 Celsius Noise Figure Intensity (reference) 4. 0 d. B Max. 20. 0 +/- 0. 56 Celsius LO to RF Isolation 40 d. B Min. 20. 0 +/- 0. 56 Celsius LO to IF Isolation 45 d. B Min. 20. 0 +/- 0. 56 Celsius Output Power +14 d. Bm 1 d. B compression Conversion Gain 25 d. B typical 20. 0 +/- 0. 56 Celsius October 12, 2006 Undulator Systems – Cavity BPM Status Bob Lill Blill@aps. anl. gov

In-Tunnel Receiver Block Diagram October 12, 2006 Undulator Systems – Cavity BPM Status Bob Lill Blill@aps. anl. gov

Prototype X-Band Low Noise Receivers Conversion gain 28 d. B Over 60 d. B dynamic range Noise Figure 2. 5 d. B IF bandwidth 40 -80 MHz Receiver noise floor -88 d. Bm assuming 20 MHz IF bandwidth Cavity BPM Sensitivity: -54 d. Bm/0. 2 n. C/1 m October 12, 2006 Undulator Systems – Cavity BPM Status Bob Lill Blill@aps. anl. gov

BPM System Test Approach Phase I Injector Test Stand ITS Install single X-Band Cavity and modified offthe-shelf down converter receiver Mount BPM on two-axis translation stage October 12, 2006 Undulator Systems – Cavity BPM Status Phase II LEUTL test with PC gun Install three X-Band Cavities BPMs Mount all 3 BPMs together on a two-axis translation stage Bob Lill Blill@aps. anl. gov

Injector Test Stand (ITS) Beam Parameters Charge- 1 n. C singlebunch Bunch length- ~ 3 - 4 ps FWHM for ps laser Spot size on final screen at 5. 5 Me. V ~ 0. 75 mm rms, ps laser October 12, 2006 Undulator Systems – Cavity BPM Status Bob Lill Blill@aps. anl. gov

(Phase I) ITS BPM Test Results BPM setup on X/Y translation stage Aligned BPM Pitch and Yaw to < 25 m Initial beam spot size 2 -3 mm rms at low charge (0. 05 n. C) at faraday cup before adding new focusing magnets to reduce to 200 um rms Beam stability limited to 50 m rms. Laser improvements ongoing October 12, 2006 Undulator Systems – Cavity BPM Status Bob Lill Blill@aps. anl. gov

ITS Data Processing Development Cavity BPM and electronics tested using ITS beam line First raw cavity voltage outputs captured on scope 6/9/06 Mover system calibration Testing is on-going following Aug/Sep shutdown October 12, 2006 Undulator Systems – Cavity BPM Status Hor. Ref. Vert. Bob Lill Blill@aps. anl. gov

ITS Data Processing Development October 12, 2006 Undulator Systems – Cavity BPM Status Bob Lill Blill@aps. anl. gov

Waveforms acquired with sampling scope and processed via Epics October 12, 2006 Undulator Systems – Cavity BPM Status Bob Lill Blill@aps. anl. gov

Normalized waveforms 0. 05 n. C charge October 12, 2006 Undulator Systems – Cavity BPM Status Bob Lill Blill@aps. anl. gov

Dipole Cavity Preliminary Test Data Parameter Predicted Value Cold Test Data ITS Test Data Frequency (TM 110) 11. 364 GHz 11. 357 GHz 11. 359 GHz Q (loaded) (TM 110) 2704 2391 2500 Isolation X/Y (TM 110) -26 d. B -23 d. B < -20 d. B Voltage Output 2. 3 m. V/um/n. C October 12, 2006 Undulator Systems – Cavity BPM Status 1. 22 m. V/um/n. C Bob Lill Blill@aps. anl. gov

(Phase II) 3 BPM Test Schedule Milestones Refine design and develop First Article Cavity BPM and support hardware August 06 Start 3 BPMs October 06 First unit with accelerated delivery October 06 Install 3 cavity BPMs into APS LEUTL and Test December 06 October 12, 2006 Undulator Systems – Cavity BPM Status Bob Lill Blill@aps. anl. gov

Prototype Phase II Cavity BPM Specification Parameter Specification Limit (change) Condition TM 110 Frequency Dipole Cavity 11. 364 GHz (11. 384 GHz) 20. 0 +/- 0. 56 Celsius Loaded Q factor Dipole Cavity 3000 +/- 200 (3500 +/- 200) 20. 0 +/- 0. 56 Celsius Power Output TM 110 Dipole Cavity -10 d. Bm 20. 0 +/- 0. 56 Celsius 1 n. C, 1 mm offset, 200 fs BL X/Y Cross Talk Dipole Cavity < -20 d. B (<-26 d. B) +/- 1 mm range 20. 0 +/- 0. 56 Celsius TM 010 Frequency Monopole Cavity 11. 364 GHz (11. 374 GHz) 20. 0 +/- 0. 56 Celsius Loaded Q factor Monopole Cavity 3000+/- 200 (3500 +/- 200) 20. 0 +/- 0. 56 Celsius Power Output TM 010 Monopole Cavity -10 d. Bm 20. 0 +/- 0. 56 Celsius 1 n. C, +/-1 mm offset range, 200 fs BL October 12, 2006 Undulator Systems – Cavity BPM Status Bob Lill Blill@aps. anl. gov

Dipole Cavity Design Beam pipe radius = 5 mm Cavity radius = 14. 937 mm (14. 888 mm) Cavity gap = 3 mm Distance beam axis to bottom of wg = 9. 5 mm (10. 5 mm) Waveguide= 19. 05 x 3 mm October 12, 2006 Undulator Systems – Cavity BPM Status Bob Lill Blill@aps. anl. gov

Monopole Cavity Design Beam pipe radius = 5 mm Cavity radius = 11. 738 mm (11. 477 mm) Cavity gap = 2 mm (3 mm) Coupling Slot = 2 x 4 mm (2. 5 x 4 mm) Tangent to surface of cavity opening to bottom of waveguide=1. 734 mm (3. 75 mm) Waveguide= 19. 05 x 3 mm October 12, 2006 Undulator Systems – Cavity BPM Status Bob Lill Blill@aps. anl. gov

Tuning Pins Feature Added Tuning pins prototyped and tested in lab Tuning pin simulations verify lab measurements Tuning pins will improve performance and production yield October 12, 2006 Undulator Systems – Cavity BPM Status Tuning Pins Bob Lill Blill@aps. anl. gov

Design Development ITS Test Unit First Article Design Cold Test Unit October 12, 2006 Undulator Systems – Cavity BPM Status Bob Lill Blill@aps. anl. gov

Receiver Design Changes Packaged 3 channel receiver High/Low gain feature (28/0 d. B) to extend dynamic range. Add a simple CW tone self-test feature October 12, 2006 Undulator Systems – Cavity BPM Status Bob Lill Blill@aps. anl. gov

Receiver Packaging Design Receiver enclosure 12. 5 wide by 11 deep by 2. 5 thick (inches) with radiation shield cover Houses input filters local oscillator and downconverter 3 -WR 75 Inputs, 3 -type “N” outputs, LO ref. input Type “N”, power and control cable October 12, 2006 Undulator Systems – Cavity BPM Status Bob Lill Blill@aps. anl. gov

SLAC ADC Development The PAD (Phase and Amplitude Detector) being considered for Cavity BPM ADC Linear Technologies LTC 2208 16 bit digitizer chip specified to run up to 130 MHz October 12, 2006 Undulator Systems – Cavity BPM Status Bob Lill Blill@aps. anl. gov

Phase II Data Acquisition Design Approach Instrument three BPMs with SLAC Built 16 bit, 130 MSPS digitizers (PAD) ü Epics driver available ü Synchronize ADC clock with 119 MHz Digitize horizontal, vertical position and Intensity 0 to 1 volt range Digital down convert 40 MHz IF decaying exponentials October 12, 2006 Undulator Systems – Cavity BPM Status Bob Lill Blill@aps. anl. gov

Phase II Testing Objectives 3 BPM Test three BPM separated by fixed distance to determine single-shot Evaluate First Article Prototypes Complete test matrix to prove compliance to specification October 12, 2006 Undulator Systems – Cavity BPM Status Bob Lill Blill@aps. anl. gov

System Layout and Planning Beam X-band receiver LRU October 12, 2006 Undulator Systems – Cavity BPM Status Bob Lill Blill@aps. anl. gov

Production Phase Production of 2 BPMs for LTU 04/07 Production of 6 BPMs for undulator 04/07 Production of 9 BPMs for undulator 06/07 Production of 9 BPMs for undulator 08/07 Production of 10 BPMs for undulator 10/07 Spares 12/07 October 12, 2006 Undulator Systems – Cavity BPM Status Bob Lill Blill@aps. anl. gov

Summary X-Band Cavity BPM development ongoing Bolt-together prototype (non-vacuum) complete ITS prototype testing ongoing 3 BPM test prototype design enhancements ongoing Receiver Prototype Development First Prototype installed in ITS with good results 3 BPM test prototype design incorporates high/low gain, self-test and final packaging Data Acquisition and Test Collaborating with SLAC to use the same ADC as SLAC LINAC BPM upgrade October 12, 2006 Undulator Systems – Cavity BPM Status Bob Lill Blill@aps. anl. gov