Beam Line BPM Filter Module Nathan Eddy May

Beam Line BPM Filter Module Nathan Eddy May 31, 2005 BPM Upgrade

Beamline BPM Upgrade – System Overview Clock Ethernet ACNET Trigger VME PPC Controller Calculate Position & Intensity A, B Echotek Digitize & Downconvert VME Crate Front Panel Cables Pickup In Tunnel A Analog Filter Gain/Att Cables (RG 8/RG 213) to Service Building Rack In Service Building Analog Filter Gain/Att B BPM Upgrade 2

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

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

Filter Module Testing § 1 st Prototype from EE Support in February Ø Miscommunication on how to evaluate two solid state switch candidates Ø Minimized usefulness of board (2 weeks) § 2 nd Prototype from EE Support Ø Discovered issue with output op amp unable to supply enough current over entire signal range (1 week) Ø Began “Real Beam” testing at F 23 (3 weeks) • Found that gain/attenuation settings needed adjustment • Found large position variations – SW 120 & temperature § Decided to make Prototype run of full board (2 weeks) Ø Analog 2. 5 MHz and 53 MHz paths look fine Ø Checkout control & test features Ø Made minor modification to test input signals § Total 2 months over estimated time to produce production boards BPM Upgrade 5

Filter Board Cartoon Monitor Out (/10) BP Input G=6 -22 db Output Gnd LP Test Input Osc LP G=2 G=39 Altera Max CPLD Switch, Op Amp Control 2. 5 MHz Test Input 53 MHz BPM Upgrade 6

Test Signal Output 53 MHz 2. 5 MHz BPM Upgrade 7

Beamline BPM Upgrade – Initial Testing § Teststand on 2 nd floor Transfer Gallery for initial testing Ø Full VME system – ppc, echotek, trigger modules, clock prototype Ø Using Prototype Analog Module Ø Using R 25 diagnostic application Ø Used to evaluate system performance and digital filter testing BPM Upgrade 8

Beamline BPM Upgrade – Initial Installation § Have new rack installed at F 23 Ø Split pickup signals to both old and new system Ø Use for beam commissioning in parallel with old system Ø Initial installation rack – full infrastructure currently installed (minus required number of filter modules) Ø Used to evaluate Filter Module prototype Data Logger Fast Time Plot BPM Upgrade 9

Beam Signal Parameters § § Mode Bunch Intensity (e 9) Cable Length (ft) Range (d. B) 1 Proton Bunch to Te. V 250 - 400 171 - 621 10. 5 4 Pbar Bunches to Te. V 10 - 170 142 - 651 31. 8 Stacking Protons (84) 40 - 130 120 - 621 17. 3 Reverse Protons (7 -35) 3 - 15 120 - 651 21. 5 2. 5 MHz Pbars (4) 5 -100 120 - 651 33. 5 Max Echotek input 1. 1 Vpp Measurement range requirements +/-15 mm Yields 900 m. Vpp maximum at 0 mm (A=B) Choose to use 700 m. Vpp to give some headroom BPM Upgrade 10

Arm & Trigger Events Transfer Lines TCLK MIBS Delay Prot MI to Te. V P 1 $4 D $7 C 2. 7 sec Pbar MI to Te. V A 1 $40 $7 B 6. 7 sec Prot Te. V to MI A 1 $5 D $D 8 6. 7 sec P 1, P 2, AP 1 $80 $79 1 sec Prot MI to Acc P 1, P 2, AP 1, AP 3 $93 $7 E 2. 5 sec Pbar Acc to MI AP 3, AP 1, P 2, P 1 $91 $7 A 22. 6 sec Prot MI to Target BPM Upgrade 11

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