Ad-hoc BI-TB for choice of FMC ADC modules

Europe/Zurich
866/2-D05 (CERN)

866/2-D05

CERN

9
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BWS Requirements

  • Acquisition:
    • 4 channels from multi-PMT
    • 12-14 bits > 480MSps
    • Analogue bandwidth > 500MHz
    • 80MHz LP after PMT
    • DC coupling
  • Control
    • 2 channels for optical sensors
    • 400kHz sinusoid
    • 10-12 bits with 40MSps OK
    • May be able to use data from ADC already included in intelligent drive unit

Acquisition currently based on FMC-1000

  • 2 channel - 650MSps - 14 bit
  • Needs 2 VFCs per scanner

Comments

  • Manfred
    • Should look at Bandpass Gaussian like filter
    • Can reduce issues with low frequency components
  • Enrico
    • 2 regimes
      • PSB & PS low frequency
      • SPS up to 40MHz bunch by bunch
      • Need to look at both as they have significantly different signal responses

LEIR Injection BPMs

Acquisition:

  • 101.3MHz sinusoidal signal
  • Sampling options
    • at > 250MSps for 1st Nyquist band
    • at > 100MSps for direct undersampling
    • Analogue BW greater than 200MHz for both
  • Ideally > 14 bit ADC

Other Systems that could profit

  • LEIR/AD Schottky
  • PSB injection diamond BLMs
  • Transfer line FBCTs

Possibilities

ADC options

  • TI ADS54J60
    • 16-bit 1 GSps
    • 11.3ENOB (70dBFS SNR)
    • 2 channels with 2/4 lanes per channel
    • Possible for 4 channels at 650MS/s

Commercial options

  • All 4 channels
    • Vadatech FMC231
      • $5578 / 14 weeks
      • Transformer coupled
    • Hitech HTG-ADC16
      • Transformer coupled
    • Abaco FMC120
      • DC coupled?
      • To be checked

Could likely find variant without DAC

ACTIONS:

  • JIRI - coordinate purchase of Abaco FMC120 (or similar) with Tom
  • JIRI - implement ADC readout on VFC once card delivered
    • Aim for demonstration early 2019
  • FEDERICO - launch market survey for LIU BWS ADC purchase
    • Get specification input from existing cards on the market - e.g. FMC120
  • JOSE - investigate the possibility to use a bandpass filtered signal for the SPS & possibly PS
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