AIDA
GELINA
BRIKEN
nToF
CRIB
ISOLDE
CIRCE
nTOFCapture
DESPEC
DTAS
EDI_PSA
179Ta
CARME
StellarModelling
DCF
K40
DESPEC
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Entry time:
Fri Oct 29 10:49:01 2021
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Plan for the day was to connect a mechanical ground to the FEEs connected to DSSD0 1, 2, 3, 4, 9, 10, 11 and 12 This was done by connecting thick copper cable to the mechanical ground wires on the AIDA frame (These ground wires are connected to the platform ground which is earthed properly we are told) Two thick copper wires were run each one for the top and right side and one for the bottom and left side. Each cable was connected to the FEEs with a star of smaller cables going to the adapter boards. Before connection the potential difference between the FEE ground and the mechanical ground was 16mV. After connection the potential difference was 3-4mV. It was checked that both the NIM ground and the PSU ground pins were on the same ground as the mechanical ground. It was just the FEE modules on a different ground. Photos of connection at end of attachments. It was found later in the afternoon that the 3mV drop comes as a result of the resistance of the bolt used to connect all the thinner wires to the thicker copper braid. Very good rates observed in all p+n strips but high rates in n+n. The large oscillations observed in waveforms yesterday are gone though. High frequency component remains Statistics - attachment 1 Rates spectra - attachment 2 Zoomed in rates spectra - attachment 3 p+n aida11 1.8.W - attachment 4 n+n aida02 1.8.W - attachmeFEE Width 9 60.25 1 64.18 10 55.76 11 64.81 3 56.21 12 48.54nt 5 We then reconfigured the PSU so that the FEEs for a given detector were all on the same PSU Rates are observed to drop across all p+n fees Statistics - attachment 6 Rates spectra - attachment 7 Rates spectra y max 10 - Attachment 8 p+n aida 12 1.8.W - attachment 9 n+n aida 02 1.8.W - attachment 10 Pulser was then connected to all p+n channels but left off Rates - attachment 11 Rates spectra - attachment 12 Rates spectra ymax10 - attachment 13 Pulser was then switched on Rates spectra - attachment 14 Statistics - attachment 15 Pulser peaks p+n - attachment 16 Pulser widths FEE Width 9 60.25 1 64.18 10 55.76 11 64.81 3 56.21 12 48.54 n=n pulser was then added to both 2 and 4 Pulser peaks n+n - attachment 17 Pulser peaks p+n - attachment 18 FEE Width 9 62.88 1 65.30 10 55.18 11 64.47 3 51.77 12 50.22 2 196.00 4 271.57 29 October Test adding LK2,3,4 to n+n n+n all LK1,2,3,4 p+n all lk 2,3,4 Makes p+n side worse - attachment 22 Remove LK3 from n+n n+n 1,2,4 p+n all LK2,3,4 A slight improvement on previous attachment 23 Remove LK2 and 4 from n+n Remove LK3 from all p+n except 1 and 3 which are the two non isolated cables attachment 24
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Attachment 1:
20211028-1300-rates-groundedfees.png
Original size: 1913x428
Attachment 2:
20211028-1300-ratespectra.png
Original size: 1900x824
Attachment 3:
20211028-1300-ratespectraymax150.png
Original size: 1908x853
Attachment 4:
20211028-1300-aida11wave.png
Original size: 1911x839
Attachment 5:
20211028-1300-aida02wave.png
Original size: 1915x879
Attachment 6:
20211018-1326-rates-psuchange.png
Original size: 1912x475
Attachment 7:
20211028-1326-ratesspectra-newpsu.png
Original size: 1908x873
Attachment 8:
20211028-1326-rates-linymax10-newpsu.png
Original size: 1903x855
Attachment 9:
20211028-1326-wavesaida12-pnpulser-newpsu.png
Original size: 1920x1080
Attachment 10:
20211028-1326-wavesaida02-newpsupng
Attachment 11:
20211028-1410-ratespulserconnoff.png
Original size: 1907x481
Attachment 12:
20211028-1412-ratespectra-normal.png
Original size: 1900x861
Attachment 13:
20211028-1412-ratesspectra-ymax10.png
Original size: 1910x870
Attachment 14:
20211028-1413-ratesymax10-pulserONpng
Attachment 15:
20211028-1414-ratesspectra-pulseron.png
Original size: 1909x468
Attachment 16:
20211028-1424-pulserpeakspn.png
Original size: 1905x816
Attachment 17:
20211028_1449_nn_18L.png
Original size: 1905x563
Attachment 18:
20211028_1451_pn_18l.png
Original size: 1890x565
Attachment 19:
PXL_20211028_121721708.jpg
Original size: 4032x3024
Attachment 20:
PXL_20211028_121738665.jpg
Original size: 4032x3024
Attachment 21:
PXL_20211028_121728173.jpg
Original size: 4032x3024
Attachment 22:
20211029_1218_stats.png
Original size: 1913x481
Attachment 23:
20211029-1400-pnlk1234nnlk124.png
Original size: 1910x356
Attachment 24:
20211029-1436-nolk3bar1and3.png
Original size: 1917x477
Attachment 25:
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