Beam Line BPM Filter Module

1. Beam Line BPM Filter Module Nathan Eddy May 31, 2005

2. Beamline BPM Upgrade – System Overview Clock Trigger VME Ethernet PPC Controller Calculate Position & Intensity Echotek Digitize & Downconvert ACNET VME Crate A,B Front Panel Cables Analog Filter Gain/Att Rack In Service Building A Pickup In Tunnel Cables (RG8/RG213) to Service Building Analog Filter Gain/Att B BPM Upgrade

3. Beamline BPM Upgrade – Electronics Overview VME Backplane PPC Controller – handles front end software, readout, and communication Digital PS CD Clock Board – provides each Echotek board with clock input (74MHz) Echotek Echotek Echotek Ethernet Echotek – digitizes & downconverts the 8 analog inputs (4 bpms) IP Modules Trigger Fanout PPC Controller CD Clock Board Trigger Fanout – generates trigger input for each Echotek from BeamSync IP Modules – modules to decode TCLK, generate triggers, calibration I/O Analog Filter – filters, attenuates, & amplifies analog signal as needed Linear PS Test/Ctrl Module – handles setup of filter modules including test pulses Analog Filter Analog Filter Analog Filter Test/Ctrl Module Separate crate for Analog Modules – linear PS & existing control software BPM Cables from Tunnel BPM Upgrade

4. Beamline BPM Upgrade – Analog Filter Module • 53MHz Bunched Beam • 1-4 large intensity bunches (TeV) • 7-84 consecutive bunches (rev P, Stacking) • 2.5MHz Bunched Beam • 4 bunches Accumulator to Main Injector • Test Feature (Electronics) • Inject 2.5MHz or 53MHz test signal • A=B, A<B, A>B • Continuous or Triggered Pulse • Proto Type 2 layer board • Done by EE support • Checkout since mid Feb • 2 channels, no test circuit • Production Boards • 5 in hand • First board with test circuit • Made minor modifications • Full Quantity (50) available in June – Order this week BPM Upgrade

5. Filter Module Testing • 1st Prototype from EE Support in February • Miscommunication on how to evaluate two solid state switch candidates • Minimized usefulness of board (2 weeks) • 2nd Prototype from EE Support • Discovered issue with output op amp unable to supply enough current over entire signal range (1 week) • Began “Real Beam” testing at F23 (3 weeks) • Found that gain/attenuation settings needed adjustment • Found large position variations – SW120 & temperature • Decided to make Prototype run of full board (2 weeks) • Analog 2.5MHz and 53MHz paths look fine • Checkout control & test features • Made minor modification to test input signals • Total 2 months over estimated time to produce production boards BPM Upgrade

6. Filter Board Cartoon Monitor Out (/10) BP Input G=6 Output -22db Gnd LP LP Test Input G=2 G=39 Switch, Op Amp Control Osc Altera Max CPLD 2.5MHz Test Input 53MHz BPM Upgrade

7. Test Signal Output 53MHz 2.5MHz BPM Upgrade

8. Beamline BPM Upgrade – Initial Testing • Teststand on 2nd floor Transfer Gallery for initial testing • Full VME system – ppc, echotek, trigger modules, clock prototype • Using Prototype Analog Module • Using R25 diagnostic application • Used to evaluate system performance and digital filter testing BPM Upgrade

9. Beamline BPM Upgrade – Initial Installation • Have new rack installed at F23 • Split pickup signals to both old and new system • Use for beam commissioning in parallel with old system • Initial installation rack – full infrastructure currently installed (minus required number of filter modules) • Used to evaluate Filter Module prototype Data Logger Fast Time Plot BPM Upgrade

10. Beam Signal Parameters • Max Echotek input 1.1Vpp • Measurement range requirements +/-15mm • Yields 900mVpp maximum at 0mm (A=B) • Choose to use 700mVpp to give some headroom BPM Upgrade

11. Arm & Trigger Events BPM Upgrade

12. Beam Line BPM Upgrade – Requirements Beams Document 1279-v3.3 BPM Upgrade