AIDA
GELINA
BRIKEN
nToF
CRIB
ISOLDE
CIRCE
nTOFCapture
DESPEC
DTAS
EDI_PSA
179Ta
CARME
StellarModelling
DCF
K40
DESPEC
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Sat Mar 29 11:37:55 2025
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<pre> TO-DO for 11.04.2024 - Try bringing bPlast drain wire ground back to the PSU ground for PN 300 and R&SRMP4040. - Recheck the downstream detector bias and ground scheme.</pre> <p>-</p> <p> </p> <p>9:27 Restarted AIDA and hit go at 9:54. Situation the same as it was in the evening of 10.04.2024. 10 out of 16 FEE64s in good condition. Waveforms of aida16,</p> <p> TEMP OK - HV OK. See attachments 1-6.</p> <p> </p> <p>10:20 We grounded the output of the R&SRMP4040 to to the drain wire ground of the bPlast ribbon cables and the output of the PN 300 PSU that is powering the booster boards. Results given by attachments 7 -11. We only saw a marginal improvement in the overall noise condition.</p> <p>10:32 We connected the ground of the frame to the drain wire ground, that is also mutually connected to the ground of the R&SRMP4040 output ground and PN 300 output ground. Results given by attachments ???. We did not see any improvement in the overal noise condition.</p> <p> </p> <p>11.00 DSSSD HV OFF</p> <p> FEE64 power OFF</p> <p> Check seating of all adaptor PCBs and drain/ground wires secured - generally OK</p> <p> </p> <p> Restart</p> <p> 1.8.W spectra - 20us FSR - attachments 15-16</p> <p> per FEE64 Rate spectra - attachment 17</p> <p> 10/16 < 20k, max 110k</p> <p> ADC data item stats - attachment 18</p> <p> Incremental improvement.</p> <p> </p> <p>11.45 DSSSD HV OFF</p> <p> FEE64 power OFF</p> <p> test - daisy chain removed</p> <p> </p> <p> Restart</p> <p> 1.8.W spectra - 20us FSR - attachments 20-21</p> <p> per FEE64 Rate spectra - attachment 19</p> <p> 10/16 < 20k, max 210k</p> <p> ADC data item stats - attachment 22</p> <p> overall somewhat worse</p> <p> </p> <p>12.20 DSSSD HV OFF</p> <p> FEE64 power OFF</p> <p> Re-install test - daisy chain, Tighten aida04 DSSSD ribbon cable drain wire.</p> <p> </p> <p> Restart</p> <p> 1.8.W spectra - 20us FSR - attachments 23-24</p> <p> per FEE64 Rate spectra - attachment 25</p> <p> ADC data item stats - attachment 26</p> <p> 10/16 < 20k, max 110k</p> <p> Status quo ante</p> <p> </p> <p> aida04 & aida08 1*W & 2*W spectra - 200us FSR - attachments 27-31</p> <p> large transients observed for aida04 1*W - cable or ASIC fault?</p> <p> </p> <p> aida16 **W spectra - 200us FSR - attachments 32-35</p> <p> all channels apopear to be working but mix of high/low noise channels for asics #3-4, asics #1-2 all appear high noise</p> <p> </p> <p> </p> <p> </p> <p> </p> <p> </p> <p>14.00 DSSSD HV OFF</p> <p> FEE64 power OFF</p> <p> Disconnect ribbon cables from aida04 adaptor PCB</p> <p> </p> <p> Restart</p> <p> n+n FEE64 1.8.W spectra - 20us FSR - attachments 37</p> <p> per FEE64 Rate spectra - attachment 36</p> <p> ADC data item stats - attachment 38</p> <p> Implies origin of large transients observed in aida04 asic#1 is downstream of the FEE64 adaptor PCB, i.e. ribbon cable or DSSSD.</p> <p> </p> <p> </p> <p>14.40 DSSSD HV OFF</p> <p> FEE64 power OFF</p> <p> re-connect ribbon cables from aida04 adaptor PCB</p> <p> 1x pin J2 slightly bent - straightended with screwdriver - FFSD connector insertion OK</p> <p> </p> <p> Restart</p> <p> n+n FEE64 1.8.W spectra - 20us FSR - attachments 40-41</p> <p> per FEE64 Rate spectra - attachment 42-43</p> <p> ADC data item stats - attachment 39</p> <p> 10x < 20k, max 120k</p> <p> </p> <p> </p> <p> aida11 asic#4 1.8.W spectra - 200us FSR - attachment</p> <p> no large transients observed</p> <p> </p> <p> DSSSD #1 & #2 bias from -120V to -100V</p> <p> ADC data item stats - attachment 40</p> <p> 9x < 20k, max 220k (aida08)</p> <p> per FEE64 Rate spectra - attachment 41</p> <p> </p> <p>17.15 bPlas ON -</p> <p> <strong> Current bPlast ground configuration:</strong></p> <p> bPlas current ground configuration - drainwires of all ribbon cables excluding short side (cont. with snout) are grounded back to the bPlast R&SRMP4040 PSU, on the 29 V output. 4 V PSU to booster boards are floating, output of PN 300 is grounded to the PSU. The mesytec PSU, that also powers bPlast SiPMs at</p> <p> 29V is not grounded to anything but the frame. Snout is currently light tight, I suspect internal radiation from FATIMA.</p> <p> It is noted that bPlast current draw fluctuated significantly (+/- 300 mV) as a result of thresholds set to the detector. I tried to set the thresholds HIGH to stabilise the bPlast detector as the power draw is fluctuating greatly. </p> <p> AIDA noise very good</p> <p> ADC data item stats - attachment 42</p> <p> 12x < 20k, max 83k (aida04)</p> <p> per FEE64 Rate spectra - attachment 43</p> <p> </p> <p> </p> <p> </p> <p>To Do list</p> <p>- separate 29V (low current) and 4V (high current) return paths/ground refs</p> <p>- The mesytec PSU that powers the bPlast detector is running to frame, it might be an idea to ground ribbon c</p> <p> </p>
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