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Upgrading Feedback Systems for Better Performance in Perugia Meeting

Learn about the need for new feedback system designs due to advances in electronics, focusing on iGP hardware improvements and DSP implementation. Explore evaluation boards and FPGA solutions.

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Upgrading Feedback Systems for Better Performance in Perugia Meeting

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  1. Feedback Systems Update Alessandro Drago SuperB General Meeting Perugia 16-19 June 2009

  2. Why a new design • The fast advances of the electronics components make obsolete the present feedback systems • Low emittance beams ask for low impact feedback systems How • Previous software/hardware legacy • Only one digital processing unit design for both longitudinal & transverse • Low noise front end receiver • 2 nsec longitudinal & transverse kickers • Reuse of old systems when possible • In particular, reuse of the power amplifiers (~50k$ for each 250W unit)

  3. Gproto / iGp evolution • After a unique first phase collaboration design, four slightly different hardware layouts have been designed [KEK, SLAC, DIMTEL + old Gproto] • Dmitry Teylman (DIMTEL Inc.) is going to start an iGp new release with 12 bits ADC: he claims that it will be ready for the begin of next year • The new iGP will have the same price list [100k$ + tax - %discount] • Interesting connected option: low noise front end [ 30k$ + tax - %discount] • DIMTEL does NOT sell the FPGA source code!

  4. Focusing on the digital processing unit:to do list for in-house R&D starting from Gproto / iGP experience • Analog to digital conversion @ 12 bits • Digital to analog conversion @ 16 bits • DSP in FPGA to implement FIR filters: gateware and firmware • Software: Operator Interface with connections to the systems • Final PCB including ADC, DAC, FPGA and interfaces

  5. ADC

  6. The dynamic range in DAFNE feedback analog blocks is in the range 78 dB – 88 dB

  7. ADC evaluation board • ADS5463EVM • NameADS5463 Evaluation ModuleStatusACTIVE • Price (US$) $299.00 

  8. DAC • MAX5891 • 16-Bit, 600Msps, High-Dynamic-Performance DAC with LVDS Inputs

  9. DAC evaluation boardPrice: $ 145,00 

  10. DAC evaluation board

  11. Xilinx FPGA:Virtex-II  Virtex-5  Virtex-6

  12. Virtex-5 Evaluation Boards[up to now no Virtex-6 boards] • Virtex-5 LXT/SXT FF1738 Prototyping • AFX-FF1738-500 PLATFORM • Platform with Xilinx FPGA $3100 • Virtex-5 LXT/SXT FF665 Prototyping • AFX-FF665-500 PLATFORM • Platform with Xilinx FPGA $2000 • XtremeDSP Development Platform — Virtex-5 FPGA ML506 Edition with XC5V-SX50T-FFG1136 (288 DSP inside) $1195

  13. FPGA Evaluation Boards AFX-FF1738-500 AFX-FF665-500 ML506

  14. Gproto (Virtex-II) block diagram External PC

  15. Using ML506 it is possible to include the pc inside the FPGA

  16. 300$ 800euro 1100$ 1500euro

  17. This similar project is financed by CSNV Human interface by a browser

  18. Another Virtex-4 solution • Agilent U1083A-003 • Acqiris RVM4400 High-Speed 6U • VME/VXS ADC/DAC Module • 10-bit ADC, 14-bit DAC, 1.2 GS/s • Price ~24 k euro

  19. Conclusion • A new version of iGP @ 12/16 bits should be ready at the begin of next year by DIMTEL, Inc. [but no FPGA source code] • The in-house upgrade of feedback digital processing unit is underway • Different design solutions are available, but it is necessary to know the amount of bunch-by-bunch feedback budget, when it will start and who will pay (SuperB TDR, NTA, CSNV, others...)

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