1 / 15

Booster Digital Damper Status & Plans Nathan Eddy PIP Meeting 12/21/11

Booster Digital Damper Status & Plans Nathan Eddy PIP Meeting 12/21/11. Motivation. Implement a bunch by bunch digital feedback system FPGA, ADC, Digital Signal Processing, DAC Wideband system Flexibility to modify system as needed Essentially an R&D project up to now

glen
Download Presentation

Booster Digital Damper Status & Plans Nathan Eddy PIP Meeting 12/21/11

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Booster Digital DamperStatus & PlansNathan EddyPIP Meeting12/21/11

  2. Motivation • Implement a bunch by bunch digital feedback system • FPGA, ADC, Digital Signal Processing, DAC • Wideband system • Flexibility to modify system as needed • Essentially an R&D project up to now • Demonstrate transverse system operation • Diagnostic capability – tune, studies, etc • Develop plan for longitudinal system

  3. Transverse Damper System Overview

  4. VME Digital Damper Board • Large Stratix II FPGA handles signal processing & interfaces on multiple clock domains • 4 ADC (up to 212MHz) & 4 DAC (up to 636MHz) locked to external RF • Digital I/O – TCLK, MDAT, BSYNC decoders, fanout, diagnostics • Up to 1GB on-board RAM • VME front-end speaks ACNET • Used in Recycler – Transverse Damper, RF Correction, ACBeam Intensity • Used for MI Anti-proton Injection Damper

  5. Current Transverse Setup

  6. Logic & Control

  7. Initial Testing Results

  8. Horizontal Instability Study

  9. Tune Monitor

  10. Tune Spectra

  11. ACNET Config & Control

  12. Diagnostic Capability • Record bunch by bunch data for entire Booster cycle • Position, Intensity, Phase • Measure Booster revolution frequency • 1Hz resolution @1ms

  13. Issues • Horizontal response is not optimal due to pickup & kicker locations • Difficulty exciting beam horizontally after transition • Chromaticity • Power • RF Clock Lock • Causes PLLs for ADC/DAC to relock • Requires re-phasing

  14. The Future • Transverse Damper currently is not needed for operation – driven largely by R&D right now • Continue to gain operational experience with Transverse Damper • Can we lower Chromaticity? • Do we require more power in the horizontal plane? • Investigate options for moving horizontal pickup & kicker and/or adding additional pickups • Ideal scenario is two pickups ~90 degrees apart • Is our current stripline pickup ideal? Use BPMs? • Begin to investigate options for longitudinal damper

  15. Budget Estimates? • Damper Upgrade • Parts purchased for 1GS/s high BW proto-type • 1 year and $5k to produce prototype • Can we go after head/tail effects – kick? • Possibility for new pickups • Pickups & Cables ~$10-20k • Possibility new amplifiers are required • Real dollars ~$100k • Longitudinal Damper (???)

More Related