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
- 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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