Beam Line BPM Filter Module Nathan Eddy May 31, 2005

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

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

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  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  1 st Prototype from EE Support in February  Miscommunication on how to evaluate two solid state switch candidates  Minimized usefulness of board (2 weeks)  2 nd 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 BP LP Altera Max CPLD Osc Gnd Test Input Monitor Out (/10) Output G=39 G=6 G=2 -22db Switch, Op Amp Control Test Input 2.5MHz 53MHz

BPM Upgrade 7 Test Signal Output 53MHz2.5MHz

BPM Upgrade 8 Beamline BPM Upgrade – Initial Testing  Teststand on 2 nd 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 Fast Time Plot Data Logger

BPM Upgrade 10 Beam Signal Parameters Mode Bunch Intensity (e9) Cable Length (ft)Range (dB) 1 Proton Bunch to TeV Pbar Bunches to TeV Stacking Protons (84) Reverse Protons (7-35) MHz Pbars (4)  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 TransferLinesTCLKMIBSDelay Prot MI to TeVP1$4D$7C2.7 sec Pbar MI to TeVA1$40$7B6.7 sec Prot TeV to MIA1$5D$D86.7 sec Prot MI to TargetP1,P2,AP1$80$791 sec Prot MI to AccP1,P2,AP1,AP3$93$7E2.5 sec Pbar Acc to MIAP3,AP1,P2,P1$91$7A22.6 sec

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