AIDA
GELINA
BRIKEN
nToF
CRIB
ISOLDE
CIRCE
nTOFCapture
DESPEC
DTAS
EDI_PSA
179Ta
CARME
StellarModelling
DCF
K40
AIDA
Draft saved at 00:00:00
Fields marked with
*
are required
Entry time:
Sat Mar 29 11:17:21 2025
Author
*
:
Subject
*
:
> 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
Encoding
:
HTML
ELCode
plain
Suppress Email notification
Attachment 1:
Drop attachments here...
Draft saved at 00:00:00
ELOG V3.1.4-unknown