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AIDA
GELINA
BRIKEN
nToF
CRIB
ISOLDE
CIRCE
nTOFCapture
DESPEC
DTAS
EDI_PSA
179Ta
CARME
StellarModelling
DCF
K40
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Message ID: 385
Entry time: Wed Oct 20 13:26:08 2021
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| Author: |
NH, OH |
| Subject: |
AIDA Noise + Filtering |
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Turn on AIDA (SL6) to investigate noise situation and impact of new RC filters on bias input
Current setup:
- No Detectors
- Pulser in fee14, fee8 *only*, no bias connected. FEEs isolated from each other
Pulser widths::
p+n grounds connected via bias link (no connection to HV bias itself)
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ASIC | FEE14 Width | FEE8 Width
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1.8.L | 14.41 | 21.86
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2.8.L | 13.02 | 21.87
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3.8.L | 12.57 | 21.52
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4.8.L | 13.75 | 23.59
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Note: FEE8 is connected via SA1 inverter -> cause of worse resolution
Plug bias into outer FEEs (14 + 8 + chaint o 6)
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ASIC | FEE14 Width | FEE8 Width
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1.8.L | 14.59 | 24.43
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2.8.L | 12.73 | 22.25
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3.8.L | 12.76 | 23.06
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4.8.L | 14.36 | 23.31
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Long run over lunch:
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ASIC | FEE14 Width | FEE8 Width
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1.8.L | 14.47 | 25.52
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2.8.L | 12.83 | 24.26
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3.8.L | 12.75 | 24.15
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4.8.L | 14.58 | 26.93
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Figures 1 & 2
Add HV filters
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ASIC | FEE14 Width | FEE8 Width
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1.8.L | 14.34 | 23.53
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2.8.L | 12.67 | 23.82
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3.8.L | 12.78 | 23.59
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4.8.L | 13.88 | 25.76
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Figures 3 & 4
Small improvement maybe?
Figs 5&6 - Oscilloscope before & after HV filter added
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Plans for tomorrow (21/10/21)
- Reintroduce pulser cables through all FEEs to see impact on noise (maybe improved now)
- Measure pulser noise in battery DSO (+ other sourceS?)
- Add a DSSD and see impact on noise with HV filter
- Resistance from FEE64 adapter to mechanical ground
- Check pulser on the battery powered scope (Is the signal common to the power supply) |
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