ELOG AIDA

AIDA GELINA BRIKEN nToF CRIB ISOLDE CIRCE nTOFCapture DESPEC DTAS EDI_PSA 179Ta CARME StellarModelling DCF K40

AIDA

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Entry time:	Sat Mar 29 11:18:08 2025
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> 00.11 Beam stopped for target @F8 change. > R35 stopped at R35_62. > BRIKEN file 161129_1951 155->159 > BigRIPS files 1084-1088. > > Bias and leakage currents ok (attachments 1+2). > > 00:38 Added 0.2 mm Al fixed degrader. The new target at F8 is 0.9 g/cm2 C, which (according to LISE calculation) > results in 2.7 MeV/u less energy loss than the previous 0.9 g/cm2 CH2 target. > > 00:42 Beam returned. R36 started. BigRIPS file 1089. > Initially out of sync with BRIKEN so reset correlation timestamp @ 01:45 (~1/2 way through R36_0). > > 02:26 Beam rate at F11 about doubled. Now ~80cps @ F11. > Previously changing beam spot position, but now 41Al now centred. > > 02:39 Beam stopped start @ of R36_11. > > 03.33 Beam returned to F11, centred on 40Mg in ZDS. > Just after start of R36_22. > BigRIPS file 1094. > > 04.35 Beam stopped. ~1/2 way through R36_34. > Continue running with R36. > > 06.13 R36 stopped. > The control module of a power supply of one of the STQs has broken and the accelerator team must contact the > manufacturer to work out a solution. > This will take some time (hours or maybe even into tomorrow). > > 09.36 STQ PSU fixed - beam returns > BigRIPS data file 1096 > > 10.00 AIDA DAQ soft reset to recover from LN2 fill cycle transient > > 10.03 DAQ starts (RIBF03R1/R38) > > ASIC settings 2016Nov29-21.38.02 > > Degrader (8mm Al) fixed + ( 0.3mm W/1mm Al + 1mm W/1m Al) variable > > 10.38 BigRIPS data file 1097 > > 10.50 Unable to sync DAQs - appears BRIKEN timestamp is not being reset, AIDA-RIBFDAQ appear to be sync'd > > 11.16 Looks like BRIKEN gets the sync again. It's some kind of integer overflow issue?! Unclear. > BRIKEN starts the new run. It is the same time as AIDA R38_14 (about 400 MB into file) > > 11.43 BigRIPS data file 1098 > > 12.47 BigRIPS data file 1099 > > 13.02 DSSSD bias & leakage currents OK - see attachments 3 & 4 > FEE64 temperatures OK - see attachment 5 > Visual scalers - see attachment 6 > Good events and Merge statistics - see attachments 7-12 > All FEE64s << 100 k data items/s > > Offline analysis of R38_34 shows most events are in DSSSDs #5 & #6 > > 13.20 DAQ stopped OK (RIBF0R1/R38_35) > > Change degrader to (8mm Al) fixed + ( 0.5mm W/1mm Al + 1mm W/1m Al) variable, i.e. additional 0.2mm W > > 13.21 DAQ starts (RIBF0R1/R39) > BRIKEN DAQ issues three re-syncs > SyncCheck OK > > 13.32 AIDA data file R39_2 > BRIKEN data file 175 > ASIC settings 2016Nov29-21.38.02 > Degrader (8mm Al) fixed + ( 0.5mm W/1mm Al + 1mm W/1m Al) variable > B-rho changed from 6.384Tm to 6.673Tm overnight => 9.3% energy change > A=40 ions at F11 change from 145MeV/u to 158MeV/u > > 14.22 Beam was off to change stripper foil. Now it is back at F11, around 10 cps at the scint (BigRIPS scaler) or > 60 cps at our normal F11 plastic > Very nearly the time of R39_12 beginning. > BigRIPS run 1101 > > 15.25 Offline analysis indicates we need to increase degrader thickness further > Will add 0.5mm W/1mm Al to change degrader to (8mm Al) fixed + ( 0.3mm W/1mm Al + 0.5mm /1mm Al + 1mm W/1mm Al > ) variable > > 15.30 DAQ continues (RIBF03R1/R39_25) > BRIKEN data file 178 > > 16.06 BigRIPS data file 1103 > > 16.23 We observed that the degrader was not actually inserted previously as we thought. > Now it is inserted, so variable degraders 1, 2 and 3: 0.5 mm W (+1 mm Al), 0.3 mm W (+1 mm Al) and 1.0 mm W (+1 > mm Al) > AIDA run is R39_36 > > 17.04 BigRIPS data file 1104 > > 17.53 System-wide checks OK except variable # of nnaida5, 7, 8 , 15 & 16 fail clock status - bit 2 always set > > 18.06 BigRIPS data file 1105 > > 18.21 DAQ stops OK (RIBF03R1/R39_60) in advance of Clover LN2 refill cycle > > 19.08 BigRIPS data file 1106 > > 19.29 DAQ starts (RIBF03R1/R41_0) > Steering to F11 changed by PD - attempt to centre implants in DSSSDs > > 19.30 BigRIPS data file 1107 > > 19.42 AIDA data file R41_2 > BRIKEN data file 183 > ASIC settings 2016Nov29-21.38.02 > Degrader (8mm Al) fixed + ( 0.3mm W/1mm Al + 0.5mm W/1mm Al + 1mm W/1m Al) variable > > 20.00 Visual scalers - see attachment 13 > > 20.27 BigRIPS data file 1108 > > 21.26 Beam lost > > 21.43 Beam back > BigRIPS data file 1109 > AIDA data file R41_26 > BRIKEN data file 183 > > 22.47 BigRIPS data file 1110. > > 23.47 BigRIPS data file 1111. Encoding: HTML ELCode plain Suppress Email notification

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