AIDA
GELINA
BRIKEN
nToF
CRIB
ISOLDE
CIRCE
nTOFCapture
DESPEC
DTAS
EDI_PSA
179Ta
CARME
StellarModelling
DCF
K40
AIDA
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Entry time:
Mon Jun 25 01:56:08 2018
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09:55 Alpha run stopped 10:45 Investigating the large noise in FEE28 First test was swapping the PSU positions of 29 and 30 - attachment 1 PSU order 25, 26, 27 ,28, 30, 29, 31, 32 Little affect on the statistics. 30 remains low and 29 is still high 11:15 System back in normal configuration with 29 and 30 going to original psu units PSU order 25, 26, 27 ,28, 29, 30, 31, 32 System does seem worse off in this order - attachment 2 11:29 Bias cables core and braid switched between detectors 1 and 2 No noticeable difference - attachment 3 11:44 Switched around cables running to FEE so DSSD1 was running to 29 and DSSD2 to 30 Noise moved with cable. Though DSSD1 seems worse in 29 than it did in 30. - attachment 4 12:00 Cables moved back in normal operation. Stats returned to as they were at 11:15 - attachment 5 13:28 Changed kapton for a new one. No change to stats - attachment 6 13:55 Wiggled rain wire (Technical term) Tripped DSSD 2 bias. Ramped up bias. Noise gone. Mystery not solved. - attachment 7 14.09 DAQ start AIDA file June18/R7 ASIC settings DB key 2018Jun22-11.28.18 *all* slow comparators 0xa Pulser walkthrough BNC PB-4 Amplitude 90,000-10,000 @ 10,000 step x5 attenuator IN t_r 100ns tau_d 50us - polarity frequency range 250Hz delay MIN, tail pulse, INT ref 14.18 DAQ stop See attachment 8 & 9 14.19 DAQ start AIDA file June18/R8 Pulser walkthrough BNC PB-4 Amplitude 12,000-2,000 @ 2,000 step x5 attenuator IN t_r 100ns tau_d 50us - polarity frequency range 250Hz delay MIN, tail pulse, INT ref 14.28 DAQ stop See attachment 10 & 11 DAQ statistics OK - see attachment 12 7x FEE64s <10k 13x FEE64s 10-20k 3x FEE64s 20-30k 3x FEE64s 30-40k 2x FEE64s 40-50k 4x FEE64 >50k (nnaida28, 29, 31 & 32) *all* system wide checks OK *except* nnaida7 & 21 fail ADC calibration FEE64 temperatures OK - see attachment 13 DSSSD biases and leakage currents OK - see attachments 14 & 15 14.43 DAQ start AIDA file June18/R9 ASIC settings DB key 2018Jun22-11.28.18 *all* slow comparators 0x64 alpha background BNC PB-4 OFF 18.30 Julabo FL11006 recirculating chiller - water refill - 75% per FEE64 1.8.W spectra - range 2ms - see attachments 16 & 17 per FEE64 1.8.W spectra - range 200us - see attachments 18 & 19 per FEE64 1.8.W spectra - range 20us - see attachments 20 & 21
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Attachment 1:
180625_1045StatsPSUSwap.png
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Attachment 2:
180625_1114_NormalOp.png
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180625_1129_BiasSwitch.png
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180625_1144_CableSwitch.png
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180625_1200_NormalOp.png
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Attachment 6:
180625_1328_ChangedKapton.png
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