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BPMs and Toroids Facility Advisory Committee April 16, 2007

BPMs and Toroids Facility Advisory Committee April 16, 2007. System overview Status Schedule. Charge Monitoring. Should be commissioning 6 toroids, 2 Faraday cups Injector charge monitor electronics installed Only 3 of 6 toroids installed IMS, IMBC1in commissioning IM01 installed but

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BPMs and Toroids Facility Advisory Committee April 16, 2007

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  1. BPMs and ToroidsFacility Advisory CommitteeApril 16, 2007 • System overview • Status • Schedule

  2. Charge Monitoring • Should be commissioning 6 toroids, 2 Faraday cups • Injector charge monitor electronics installed • Only 3 of 6 toroids installed • IMS, IMBC1in commissioning • IM01 installed but • Output shorted by vacuum bolt • Replace when we can break vacuum • IM02, IM03, IMBC1out not installed • Two Faraday cups installed • FCG1 functional • FC01disabled on insertion

  3. S2 S1 Baseline Int#1 Channel Access 4 Chan Fast Digitizer + - LNA S/H S4 Toroids 1-4 S3 Beam Pulse Int#2 S5 LMR-400 x 8 Raw Data MPS Signals to Fast Acquisition Board for waveform capture Toroids 5-8 Toroid/Cal Cables Beam Pulse Analog Charge Values trig Int#1 Int#2 Signal amplitude IOC MPS EVR ADC Dark Current Channel Access t1 t5 t6 Acromag IP330 16 channel, 16-bit 8uS conv. time t3 t4 t2 EVR Charge Monitors

  4. Toroid Dark Current Monitor

  5. Toroid Interior

  6. Results • Two toroids measure charge • Readings appear to jitter +-5% • more than we think the beam current jitters • Amp input bandwidth too high • Decrease bandwidth into first amp • Present bandwidth not useful • May be causing several percent jitter • Expect this will be resolved quickly • Early indication is that an impromptu RC filter reduces jitter • Will engineer proper mod to input network

  7. Next Phase • Complete Injector installation/commissioning • 7 more toroids : • BC2 • LTU • Undulator • Dump • BC2 / BTH west installation design in progress

  8. Beam Position Monitors • System overview • Status • Schedule

  9. Status • Built 23 BPM processors • Installed 21 BPM processors • Problems remaining • Parts for remaining two • Commissioning software • No global setup tool

  10. BPM Diagnostic Panel • View/ adjust BPM parameters • View digitizer waveform • Set attenuators • Set timing • Watch beam position pulse to pulse

  11. Orbit Plot

  12. Gun Jitter • Beam jitter plus BPM resolution ~10 microns

  13. Status (cont.) • Performance at least adequate for commissioning • Preformance not yet well studied • Just getting access to tools • Correlation plots, beam synch acquisition

  14. Next • Characterize BPM performance • Establish resolution, offset, stability in operation • Plan for BC2, linac BPM installation • 8 BPMs per sector • New environmetally-controlled racks • Revise BPM processor board • Fab, test, install linac BPM system this year

  15. PRD 1.1-314 Full document:

  16. Beam Position Monitor System Analog Frontend Version Three

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