 Sun Mar 26 03:53:43 2017, CG, OH, Sunday 26th March 
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10.30 Left DAQ running overnight to look for alphas in DSSDs.
DSSD bias still ok @ 23.3oC (see att. 1).
FEE temps ok.
Slow and fast comparator thresholds set to 0x60 (~1Mev).
No obvious alphas (see att. 2+3).
11.00 Looked at waveforms and see long ripple (period ~10us) in a lot of the FEEs, e.g. nnaida15 in attachment 4. |
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Mon Apr 25 10:11:40 2016, CG, KM, PV & TD, Monday 25 April
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AIDA stand, Julabo FL11006 recirculating chiller (with 110VAC/50Hz - 240VAC/50Hz 3ph transformer)
moved from F11 downstream wall to ~2m downstream of EURICA
Julabo FL11006 recirculating chiller emptied, re-filled and tested OK
Completed installation of non-grounded, cat 6 network cables between Netgear Gbit network switches
and AIDA FEE mdoules |
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Wed Nov 9 22:16:11 2016, CG, DK, TD, ML, NP1412 R24 R25 34x
|
07.15 R24 started. BRIKEN run 33.
76~78Ni beam setting.
F5 C target out. F7 CH2 in. F11 C out.
F11 plastic rate ~500cps.
1mm Al vairable degrader removed after ~3mins. Now have 4.4mm in.
07.26 R24 stopped for unknown reason - fill cycle had previously happened, similar scenario to yesterday.
Soft reset performed successfully.
07.36 R25 started.
No changes to beam settings above. F11 plastic rate ~500cps.
Offline implant rates:
*** DSSSD # 1 count: 894 old count: 682 dt: 1.02 s HEC rate: 207.66 Hz
*** DSSSD # 2 count: 781 old count: 590 dt: 1.02 s HEC rate: 187.09 Hz
*** DSSSD # 3 count: 900 old count: 682 dt: 1.02 s HEC rate: 213.54 Hz
*** DSSSD # 4 count: 790 old count: 594 dt: 1.02 s HEC rate: 191.99 Hz
*** DSSSD # 5 count: 421 old count: 317 dt: 1.02 s HEC rate: 101.87 Hz
*** DSSSD # 6 count: 162 old count: 128 dt: 1.02 s HEC rate: 33.30 Hz
08.13 Beam stopped.
corresponds to file R25_9.
08.15 Leakage currents attachments 1+2.
08.20 Takechi group changing settings: F5 C now in, F7 now empty, F11 C (6mm) now in.
Beam returned to AIDA.
Corresponding to 1.0Gb through file R25_10.
4.4mm of Al variable degrader currently in place. Will gradually remove.
08.23 All variable degrader removed.
Corresponds to start of file R25_11.
Rates from offline implant finder:
*** DSSSD # 1 count: 474 old count: 310 dt: 1.02 s HEC rate: 160.08 Hz
*** DSSSD # 2 count: 407 old count: 269 dt: 1.02 s HEC rate: 134.70 Hz
*** DSSSD # 3 count: 473 old count: 306 dt: 1.02 s HEC rate: 163.01 Hz
*** DSSSD # 4 count: 463 old count: 303 dt: 1.02 s HEC rate: 156.18 Hz
*** DSSSD # 5 count: 331 old count: 220 dt: 1.02 s HEC rate: 108.35 Hz
*** DSSSD # 6 count: 64 old count: 43 dt: 1.02 s HEC rate: 20.50 Hz
09.18 Beam stopped
Corresponds to file R25_23
09.20 Takechi et al.change settings - F5, F7, F11 out
Variable degrader 5.4mm Al in
First AIDA data file R25_24, BRIKEN 161110_0923_767778Ni_036
from file R25_26 (offline):
*** DSSSD # 1 count: 13306 old count: 13159 dt: 1.01 s HEC rate: 145.63 Hz
*** DSSSD # 2 count: 3578 old count: 3536 dt: 1.01 s HEC rate: 41.61 Hz
*** DSSSD # 3 count: 7699 old count: 7609 dt: 1.01 s HEC rate: 89.16 Hz
*** DSSSD # 4 count: 6191 old count: 6121 dt: 1.01 s HEC rate: 69.35 Hz
*** DSSSD # 5 count: 1891 old count: 1872 dt: 1.01 s HEC rate: 18.82 Hz
*** DSSSD # 6 count: 1377 old count: 1364 dt: 1.01 s HEC rate: 12.88 Hz
10.08 All system wide checks OK *except* nnaida8 & 16 fail clock status, nnaida23 fails ADC calibration
10.14 Beam stopped
Corresponds to file R25_36
10.19 Takechi et al.change settings - F5 in, F7 out, F11 in
Variable degrader all out
First AIDA data file R25_37, BRIKEN 161110_1016_767778Ni_37
10.26 Rate, Hitrate, 1.8.L and 1.8.W spectra - see attachments 3-12
All spectra cleared
10.30 Merge statistics - see attachments 13-17
10.32 Noted that nnaida19 histogram link has dropped - non-critical - continue DAQ
11.09 Change of target upstream: F5 empty, F7 CH2, F11 C 6mm
Corresponds to AIDA data file R25_48
11:14 Change completed
Corresponds to AIDA data file R25_49
11:21 All degraders out
Corresponds to AIDA data file R25_51
From AIDA R25_55:
*** DSSSD # 1 count: 241 old count: 0 dt: 1.02 s HEC rate: 235.75 Hz
*** DSSSD # 2 count: 210 old count: 0 dt: 1.02 s HEC rate: 205.42 Hz
*** DSSSD # 3 count: 242 old count: 0 dt: 1.02 s HEC rate: 236.72 Hz
*** DSSSD # 4 count: 209 old count: 0 dt: 1.02 s HEC rate: 204.44 Hz
*** DSSSD # 5 count: 118 old count: 0 dt: 1.02 s HEC rate: 115.43 Hz
*** DSSSD # 6 count: 46 old count: 0 dt: 1.02 s HEC rate: 45.00 Hz
11:40 lost beam
Current AIDA data R25_56
11:45 beam back
Current AIDA data R25_57
12.19 Takechi et al. change settings - F5 in, F7 out, F11 C 6mm
Corresponds to AIDA data file R25_65
All degraders 5.4mm Al in
12.24 All degraders out
Corresponds to AIDA data file R25_67
From offline analysis of R25_67
*** DSSSD # 1 count: 584 old count: 472 dt: 3.91 s HEC rate: 149.31 Hz
*** DSSSD # 2 count: 516 old count: 410 dt: 3.91 s HEC rate: 131.92 Hz
*** DSSSD # 3 count: 607 old count: 488 dt: 3.91 s HEC rate: 155.19 Hz
*** DSSSD # 4 count: 595 old count: 475 dt: 3.91 s HEC rate: 152.12 Hz
*** DSSSD # 5 count: 439 old count: 355 dt: 3.91 s HEC rate: 112.24 Hz
*** DSSSD # 6 count: 87 old count: 69 dt: 3.91 s HEC rate: 22.24 Hz
ADC & disc data synchronised - see attachments 17-18
13.38 R25_84 Bias and leakage currents ok - see attachments 19 and 20
13.57 FEE settings checked by saving current settings to file and comparing against the last saved settings. No change was found in the ASIC settings.
14.33 BRIKEN now on run 40 file name 161110_1419. DSSD Rates
*** DSSSD # 1 count: 138 old count: 0 dt: 1.02 s HEC rate: 135.54 Hz
*** DSSSD # 2 count: 119 old count: 0 dt: 1.02 s HEC rate: 116.88 Hz
*** DSSSD # 3 count: 139 old count: 0 dt: 1.02 s HEC rate: 136.52 Hz
*** DSSSD # 4 count: 134 old count: 0 dt: 1.02 s HEC rate: 131.61 Hz
*** DSSSD # 5 count: 101 old count: 0 dt: 1.02 s HEC rate: 99.20 Hz
*** DSSSD # 6 count: 20 old count: 0 dt: 1.02 s HEC rate: 19.64 Hz
15:14 BigRIPS now on Run 439 (CH2 Target in at F7)
AIDA file R25_104
15.17 BRIKEN now on run 41 file name 161110_1516
*** DSSSD # 1 count: 380 old count: 169 dt: 1.05 s HEC rate: 200.67 Hz
*** DSSSD # 2 count: 326 old count: 144 dt: 1.05 s HEC rate: 173.09 Hz
*** DSSSD # 3 count: 381 old count: 172 dt: 1.05 s HEC rate: 198.77 Hz
*** DSSSD # 4 count: 336 old count: 150 dt: 1.05 s HEC rate: 176.90 Hz
*** DSSSD # 5 count: 191 old count: 86 dt: 1.05 s HEC rate: 99.86 Hz
*** DSSSD # 6 count: 73 old count: 35 dt: 1.05 s HEC rate: 36.14 Hz
15.26 bias and leakage ok see attachment 21 and 22
16.04 BigRIPS Setting change now on 440 F5 In F7 Out F11 In
16.08 BRIKEN Now on run 42 File 161110_1608
16.09 Bias and leakage currents ok attachments 23 and 24
From offline r25_119
*** DSSSD # 1 count: 255 old count: 117 dt: 1.04 s HEC rate: 132.79 Hz
*** DSSSD # 2 count: 234 old count: 111 dt: 1.04 s HEC rate: 118.35 Hz
*** DSSSD # 3 count: 259 old count: 120 dt: 1.04 s HEC rate: 133.75 Hz
*** DSSSD # 4 count: 250 old count: 115 dt: 1.04 s HEC rate: 129.90 Hz
*** DSSSD # 5 count: 181 old count: 84 dt: 1.04 s HEC rate: 93.34 Hz
*** DSSSD # 6 count: 33 old count: 18 dt: 1.04 s HEC rate: 14.43 Hz
16.54 BRIKEN AND BigRIPS change runs. Corresponding to AIDA file R25_129
BigRIPS Now F5 In, F7 Out F11 Out
All variable Al degraders in 5.5mm
16.48 New BRIKEN run
Run number 043
File name: 161110_1658_767778Ni
17.02 Bias and leakage currents ok see attachment 25 and 26
DSSD Rates from offline file R25_131
*** DSSSD # 1 count: 269 old count: 127 dt: 1.04 s HEC rate: 136.32 Hz
*** DSSSD # 2 count: 224 old count: 107 dt: 1.04 s HEC rate: 112.32 Hz
*** DSSSD # 3 count: 257 old count: 118 dt: 1.04 s HEC rate: 133.44 Hz
*** DSSSD # 4 count: 160 old count: 71 dt: 1.04 s HEC rate: 85.44 Hz
*** DSSSD # 5 count: 29 old count: 13 dt: 1.04 s HEC rate: 15.36 Hz
*** DSSSD # 6 count: 3 old count: 2 dt: 1.04 s HEC rate: 0.96 Hz
17.48 BigRIPS change setting putting back the thick Carbon at F11 6mm. Corresponds to AIDA file R25_141
F5 In, F7 Out, F11 In C 6mm
All variable Al degraders removed.
BigRIPS run 442
17.52 BRIKEN starts run 44
File name 161110_1752767778Ni
AIDA file R25_142
bias and leakage currents ok attachments 27 and 28
DSSD rates offline from R25_142
*** DSSSD # 1 count: 275 old count: 136 dt: 1.03 s HEC rate: 134.63 Hz
*** DSSSD # 2 count: 240 old count: 114 dt: 1.03 s HEC rate: 122.04 Hz
*** DSSSD # 3 count: 275 old count: 134 dt: 1.03 s HEC rate: 136.57 Hz
*** DSSSD # 4 count: 266 old count: 130 dt: 1.03 s HEC rate: 131.73 Hz
*** DSSSD # 5 count: 180 old count: 86 dt: 1.03 s HEC rate: 91.05 Hz
*** DSSSD # 6 count: 46 old count: 24 dt: 1.03 s HEC rate: 21.31 Hz
18.16 System-wide checks OK *except* clock status (some/all of nnaida5,7,8,15&16 - see attachment 29) and ADC calibration (nnaida23)
18.24 DAQ stops OK
AIDA data filename R25_149
18.28 System wide checks show SYNC pulse and SYNC errors - see attachments 30-32
18.31 Stop & close merger & TapeServer
DAQ reset
DAQ setup - not complete - use Master Timestamp tab to ReSYNC
but note unusual(?) ReSYNC LSW value before second ReSYNC attempt- see attachments 33 & 34 before and after ReSYNC
|
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Wed Nov 30 21:26:52 2016, CG, DK, TD, Thursday 1 December 10x
|
00.51 BigRIPS data file 1112.
01.50 BigRIPS data file 1113.
02.55 BigRIPS data file 1114.
03.56 BigRIPS data file 1115.
04.58 BigRIPS data file 1116.
05.57 BigRIPS data file 1117.
06.26 Stopped run R41 @R41_126 ahead of LN2 fill.
Bias and leakage currents ok (attachments 1+2).
BRIKEN files 161130_1942_183.dlt to 161130_1942_197.dlt
06.54 BigRIPS data file 1118.
(DK arrives)
07.44 R42 started following LN2 fill. (BRIKEN computer had some problems, delaying restart.)
No synchronisation with BRIKEN during R42_0.
Re-sync pulse issued and synchronisation obtained 1.2GB into R42_0.
7.55 Big RIPS run 1119
(CG departs)
8.55 Big RIPS run 1120: corresponds roughly to AIDA R42_15
circa 9.00: Offline analysis of present condition: https://elog.ph.ed.ac.uk/AIDA/509
09.55 BigRIPS data file 1121
10.00 Beam is stopped for changing stripper foil. Nearly at the end of R42_27.
Previously there was 8. + 0.2 mm of Al on the upstream side of the PE wall
Pb bricks between MUSIC 1 and MUSIC 2 had the width reduced from 7.5 cm by ~1 cm compression on the beam
right side
So the total gap in this location should be
Now we have 5 mm Al between MUSIC 1 and MUSIC 2.
3. mm and 0.2 mm Al is on the upstream side of PE wall.
(Total thickness of Al degraders is not changed, only the distribution of the material around F11.)
(Variable degraders are not moved: 0.5 mm W + 0.3 mm W + 1.0 mm W (+3 mm Al backing))
10.08 BigRIPS data file 1122
10.09 Beam returns: 1.3 GB into R42_29
circa 12:00: offline analysis of present condition: https://elog.ph.ed.ac.uk/AIDA/510
11.09 BigRIPS data file 1123
(TD arrives, DK to lunch)
12.09 BigRIPS data file 1124
12.42 DAQ stops (RIBF03R1/R42_68) - overloaded /data10 filesystem sshd/rsync + rm
Unable to soft reset, power cycle FEE64s
13.11 DAQ starts (RIBF03R1/R43)
ASIC settings 2016Nov29-21.38.02
13.18 BRIKEN issues multiple syncs - attempting to reset correlation scalers
13.21 BigRIPS data file 1125
13.25 Correlation scalers now reset, SyncCheck OK
AIDA data file R43_2
BRIKEN data file 205
BigRIPS 1125 (circa 13.21)
15 cps at BigRIPS scaler F11 plastic; network camera for ZDS scaler has 55 cps
(DK return, TD to lunch and PAC)
15.26 BigRIPS setting changes from 40Mg setting to unreacted 41Al setting.
About half way in AIDA R43_27
BigRIPS #1127
F11 plastic at BigRIPS scaler is about 30 cps (doubled from before)
Brho settings:
D6 7.3989 Tm
D7 6.2253 Tm
D8 6.2405 Tm
16.25 Operator calls. The beam is stopped. They don't specify for how long and we don't know the exact
technical reason without native Japanese speaker
Phone rang in the beginning near AIDA R43_41
16.33 They put back the disable access radiation control...beam returns soon?
16.43 R43_47 run in AIDA, beam comes back.
F11 scint scaler of BigRIPS shows around 30 cps as before. (network camera scaler from ZDS shows about 80
cps)
BigRIPS data file 1128
16.58 Naive estimation of the energy loss difference of 40Mg and 41Al from different optics settings
Use D8 Brho of 6.3208 Tm of R21_0
40Mg energy after 8mm Al: 125 MeV/u
41Al " " " ": 140 MeV/u
Use D8 Brho of 6.2405 Tm as above for the present settings
40Mg energy after 7 mm Al: 125 MeV/u
41Al energy after 6.5 mm Al: 142 MeV/u
So, neglecting other stopping materials, the difference between implantation depths could be about 1 or 2
SSD layers towards the front of AIDA.
17.08 R43_53 removed variable degrader #1 (0.5 mm W [+1 mm Al])
Variable degrader setting is now #2 + #3: 0.3 mm W + 1.0 mm W [+2 mm Al]
17.14 SyncCheck OK
BRIKEN data file 210
AIDA data file R43_55
17.28 DSSSD bias & leakage currents OK - see attachments 3 & 4
FEE64 temperatures OK - see attachment 5
Visual scalers - see attachment 6
good events statistics - see attachment 7
System wide checks OK *except* nnaida13 fails ADC calibration and variable number of nnaida5, 7, 8, 15 & 16
fail clock status - bit 2 always set
17.49 BigRIPS data file 1129
Centre ZDS @ 40Mg
Change degrader to (8mm Al) fixed + (0.3mm W/1mm Al + 0.5mm W/1mm Al, 1mm W/1mm Al) variable
17.53 SyncCheck OK
AIDA data file R43_64
BRIKEN data file 211
18.24 DAQ stops OK (RINF03R1/R43_71)
Ready for LN2 refill sequence
18.56 BigRIPS data file 1130
19.32 DAQ starts (RIBF03R1/R44)
19.35 SyncCheck OK
BRIKEN data file 213
AIDA data file R44_1
ASIC settings 2016Nov29-21.38.02
Degrader (8mm Al) fixed + (0.3mm W/1mm Al + 0.5mm W/1mm Al + 1mm W/1mm Al) variable
19.57 BigRIPS data file 1131
20.54 beam off for stripper foil change
21.04 1.8.W spectra -see attachments 8 & 9
good events stats - see attachment 10
Varying levels of 100kHz period extrinsic noise for FEE64s nnaida17, 18, 19 & 23
21.06 Back back
SyncCheck OK
BigRIPS data file 1132
AIDA data file R44_31
BRIKEN data file 214
21.55 SyncCheck OK
22.05 BigRIPS data file 1133
22.15 System-wide checks OK *except* nnaida13 fails ADC calibration and variable # of nnaida5, 7, 8, 15 & 16 fail
clock status - status bit 2 always set
23.04 BigRIPS data file 1134 |
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Mon Jun 6 19:26:38 2016, CG, DK, BM, AE, Tues 7th June 28x
|
02.08 Tried updating AIDA SYNC on stats page and got this message.
See attachment 8
02.16 Runs R1201-1206 are short runs on the 1GeV, each wit the variable degrader thickness changed to alter the depth of implantation (estimated by visual scalar rates per DSSD)
Started 02.16 - 02.47
02.56 Started R1207 (EURICA run_1407, BigRIPS run 1192).
Settings file 2016Jun07-05.50.53. All nnaida back to 20MeV setting.
Temps ok. Leakage currents ok.
3.68mm variable degrader in + 19.3mm fixed degrader.
Operator stopped beam @ 03.41. Run stopped.
Merger outputting some info to terminal re. unexpected header found (attachment 3)
04:05 Beam is back, but some trouble to get AIDA DAQ happy
04:52 Started R1208 (EURICA run_1408, BigRIPS 1193)
Settings file 2016June07-02.50.53
From 5:05 to 5:20, F82a, and F51a (twice) trip. We reduced the F51a from -745 V; -735 V; to -720 V settings.
06:51 Continued with R1208_19 (EURICA has 1410 begin at 6:40, BigRIPS began 1195 at ~7:00)
Biases uploaded as attachments 4 and 5
7:13 data stopped going to disk
Shortly after that (7:15) operator calls to take control of the beam.
07.40 Beam returned. Some trouble restarting DAQ.
07.56 Run R1209 started.
Settings file 2016Jun07-02.50.53
No changes to settings or degraders. Temps ok. Leakage currents ok.
PPACs tripped repeatedly around 08.10.
09.13 Beam setting changed and run stopped.
11.25 Current status
Julabo FL11006 recirculating chiller set point +15.0deg C (B3F +24.6 deg C, dew point +10.3 deg C, RH 40.7%)
System-wide checks - all FEE64s pass all tests *except* nnaida19 which fails ASIC clock timestamp and SYNC errors not counting
i.e. status is unchanged
nnaida19 merge data link (#18) disabled - see attachment 12
nnaida19 ReSYNCs OK but timestamp is adrift of other FEE64s - see attachment 11
Detector biases & leakage currents - OK - see attachments 9-10
R1211 neutron-rich setting *tuning*
R1212 Prior to start of run, AIDA trigger rates (1GeV FSR MEC setting)
#1 670Hz, #2 820Hz, #3 680Hz, #4 540Hz, #5 900Hz, #6 440Hz F11 650Hz, beta trigger 360Hz
start 15.10
stop 15.41 (run stopped to reboot EURICA VME crate)
ASIC settings DB key 2016Jun07-02.50.53
4mm Be target
Degrader (17+1)mm + 1.08mm (17+1)mm fixed #1 out #2 out #3 in (1.08mm) #4 no change, cannot be observed
Trigger = OR ( DSSSD#1 - #6 ) .AND. EURICA .AND. .NOT.veto (plastic downstream AIDA)
R1213
N.B. EURICA offline due to fault with VME crate RIO3 interface card continue with AIDA+BigRIPS
start 15.05
stop 17.34 (beam lost)
ASIC settings DB key 2016Jun07-02.50.53
4mm Be target
Degrader (17+1)mm + 1.08mm (17+1)mm fixed #1 out #2 out #3 in (1.08mm) #4 no change, cannot be observed
Trigger = OR ( DSSSD#1 - #6 ) .AND. EURICA .AND. .NOT.veto (plastic downstream AIDA)
Attachments 20-28 1*H spectra, FEE64 'right' (n+n ohmic strip, 20GeV FSR energy spectra) & stat/rate hit patterns
17.40 Julabo FL11006 set point +15.0deg C B2F/F11 temp 25.3 deg C, dew point 11.0 deg C, RH 41.8% |
|
Sun Jun 5 17:09:49 2016, CG, DK, AE, Monday 6th June 20x
|
00.45 Run R1100 started on n-rich setting (EURICA run_1100, BigRIPS run 1165)
Degraders as noted in previous entry
Check clock status failed for nnaida5. ADC calib failed for nnaida8. nnaida19 failed Check ASIC clock and Check SYNC errors.
Temps ok. Leakage currents ok.
Settings file 2016Jun06-00.31.34
AIDA fluctuating but all > 0.
Tape rate ~8Mb/s.
Merge was outputting some interesting looking messages to terminal about queue being full and timestamps going backwards (attachment 3).
TapeServer window shows data being written as does repeated ls in /TapeData/NP1306. Writing one file every ~5-7min.
01.45 Merger went into 'Want next SYNC'
AIDA SYNC rate went to zero and TapeService stopped writing data.
Run stopped and FEEs power cycled as contact was lost with ~50%.
Beam operators want to do some tuning so control has been given to them while we start back up.
02.22 Started run R1101 on n-rich setting (EURICA run_1101-1102, BigRIPS run 1168-1169)
Increased fast disc threshold to 5 in all nnaida to prevent merger from running so fast and possibly choking.
Stopped @ 04.20
Realised after, nnaida24 had been on 1GeV range.
04.28 Started run R1102 on n-rich setting (EURICA run_1103, BigRIPS run 1170)
Stopped as 04.37 nnaida24 in 1GeV range.
04.39 Started run R1103 on n-rich setting (EURICA run_1104, BigRIPS run 1170)
Settings file 2016Jun06-04.39.22 -> same as previous settings but nnaida24 changed to 20MeV range.
Stopped at 04.59 at request of beam operators.
05.11 Started run R1104 on n-rich setting (EURICA run_1105, BigRIPS run 1171)
Merger died.
Stopped @ 05.15.
Ctrl-c out of all tape/merger related windows and restarted them. Setup/Configure etc.
05.34 Started run R1105 on n-rich setting ( EURICA run_1106, BigRIPS run 1172)
Settings file 2016Jun06-05.34.56 -> nnaida24 reverted back to 1GeV range. New settings file to make sure nnaida24 is set to 1GeV range. Changed in Save/Restore options.
Temps ok. Leakage currents ok.
Rates in visual scalar ~10% higher.
07.22 Lost contact with nnaida4 and merger stopped outputting data.
Stopped run R1105.
Power cycle FEEs and start new run.
On two power cycles, certain FEEs were not contactable.
Beam stopped by operators for brief period.
08.14 Run 1106 started on n-rich setting (EURICA run_1108, BigRIPS run 1175)
Settings file 2016Jun06-05.34.56
Temps ok. Leakage currents ok.
Stopped 09.06 for setting change.
09.41 Run 1107 started on reference mass setting (EURICA run_1200, BigRIPS run 1177)
Settings file 2016Jun06-05.34.56
11:24 Network link to the outside world is dropped across B3F
Beam is being controlled by the primary operators.
Run 1108 - background run with beam off from 10:29 to 11:31 (EURCA run 1201, no BigRIPS run)
(Was still editing the elog without submitting it. Sorry!)
Settings file was saved: 2016Jun06-10.45.31
Leak currents from paper logbook in consecutive order bias1 ch0-3, bias2 ch0-1 in uA: 3.225, 4.155, 3.515, 3.315, 3.65, 3.205
12.45 start R1110 (AIDA) run_1103 (EURICA)
Continuing reference mass measurement following earlier network outage B3F
ASIC settings 2016Jun06-05.34.56
see attachments 13-20
13.30 Stopped R1110 for B3F entry
'unable to connect' to nnaida1 etc
AIDA FEE64s reset OK but would not ReSync wuth about half of the FEE64s returning -1 status code
power cycle FEE64s, reboot aidas1 & FEE64s
14.03 ASIC seetings DB key 2016Jun06-14.03.48
14.20 System-wide checks
All FEE64s pass all tests *except*
nnaida21 ADC calibration
nnaida19 ASIC clock timestamp & SYNC errors not counting
|
|
Tue Nov 8 18:52:32 2016, CG, DK, NP1412 R7 R8
|
03.50 74-76Ni beam delivered to F11.
F11 plastic rate ~1kHz.
F5 C target in. F7 empty. F11 C target in.
R7 started 03.51.
Initial rate 0Hz in all DSSD.
Removed all variable degraders and implant rate only up to ~1Hz in DSSD1.
Will replace all variable degraders, enter B2F and remove fixed 5mm plate and work back from there.
R7 stopped 04.00.
04.07 Beam returned to F11.
F11 plastic rate 1.1kHz.
R8 started normally.
Will now gradually remove variable degraders.
04.18 Now removed all variable degraders.
Implant rates from offline/full analysis below:
*** DSSSD # 1 count: 697 old count: 354 dt: 1.03 s HEC rate: 333.95 Hz
*** DSSSD # 2 count: 592 old count: 308 dt: 1.03 s HEC rate: 276.51 Hz
*** DSSSD # 3 count: 696 old count: 349 dt: 1.03 s HEC rate: 337.85 Hz
*** DSSSD # 4 count: 688 old count: 348 dt: 1.03 s HEC rate: 331.03 Hz
*** DSSSD # 5 count: 609 old count: 312 dt: 1.03 s HEC rate: 289.16 Hz
*** DSSSD # 6 count: 229 old count: 116 dt: 1.03 s HEC rate: 110.02 Hz
Leakage currents @ 04.21 attachments 1+2.
05.55 Takechi group want to remove C target.
Moving variable degraders back into place.
R8 stopped 05.59.
Leakage currents @ 05.55 attachments 3+4. |
|
Tue Nov 8 21:01:40 2016, CG, DK, NP1412 R9
|
06.02 R9 started with Takechi group C target out and all variable degraders in.
F5 C in. F7 empty. F11 empty.
F11 plastic rate 1.1kHz.
Offline sort rates below:
*** DSSSD # 1 count: 636 old count: 317 dt: 1.01 s HEC rate: 314.93 Hz
*** DSSSD # 2 count: 544 old count: 267 dt: 1.01 s HEC rate: 273.47 Hz
*** DSSSD # 3 count: 628 old count: 308 dt: 1.01 s HEC rate: 315.92 Hz
*** DSSSD # 4 count: 532 old count: 267 dt: 1.01 s HEC rate: 261.62 Hz
*** DSSSD # 5 count: 146 old count: 76 dt: 1.01 s HEC rate: 69.11 Hz
*** DSSSD # 6 count: 6 old count: 3 dt: 1.01 s HEC rate: 2.96 Hz
06.09 Removed 1mm of variable degrader.
Offline sort rates/below:
*** DSSSD # 1 count: 1501 old count: 1316 dt: 4.61 s HEC rate: 325.34 Hz
*** DSSSD # 2 count: 1231 old count: 1079 dt: 4.61 s HEC rate: 266.82 Hz
*** DSSSD # 3 count: 1498 old count: 1314 dt: 4.61 s HEC rate: 324.69 Hz
*** DSSSD # 4 count: 1502 old count: 1323 dt: 4.61 s HEC rate: 325.55 Hz
*** DSSSD # 5 count: 1346 old count: 1182 dt: 4.61 s HEC rate: 291.74 Hz
*** DSSSD # 6 count: 487 old count: 430 dt: 4.61 s HEC rate: 105.56 Hz
06.20 Stopped the run preemptively to Ge LN2 autofill which is known to crash the DAQ |
|
Fri Nov 25 15:56:36 2016, CG, DK, Saturday 26 November 11x
|
00.55 Bias and leakage currents ok (attachments 1+2).
Temps ok (attachment 3).
01.40 DAQ starts (RIBF03R1 - Run R1)
Pulser walkthrough
BNC PB_4 amplituides 90,000 - 10,000 @ 10,000 step
x5 attenuator IN
frequency 250Hz range
t_r 50ns tau_d 50us
polarity -, tail pulse, delay MIN
01.55 Ambient temperature +24.8 deg C, d.p. -2.2 deg C, RH 16.6%
02.05 DAQ starts (RIBF03R1 - Run R2)
Pulser walkthrough - same settings as above.
BNC PB_4 amplitudes 14,000 - 2,000 @ 2,000 step
02.48 Run R3 started.
Pulser off. Background run.
15cm Pb wall removed
6mm Pb degrader installed between MUSIC 1 & 2
variable degrader 1mm, 0.5mm & 0.3mm W + 1mm Al attached to each W sheet.
04.14 Noticed R3 stopped
05.40 Difficulty starting DAQ
'want first SYNC' from merger
lost contact with nnaida19 - restarting merger
TclHttpd server on nnrpi1 crashed - restarted remotely
unable to power cycle - need to check fuses when next obtain access
whilst waiting boot aidas1
F11 rate c. 450Hz
AIDA veto plastic c. 3200Hz
07.30 R7 started with beam.
07.38 Beam stopped.
R7 continues.
08.12 Beam returned to F11.
File R7_9
08.50 Beam stopped.
Start of R7_17.
Using implantdecay.f saw no HEC events in any DSSD. Removed 2mm of Pb degrader.
We re-insert all the variable Al degraders (for now) for safety. We can remove them again when the beam
comes back, as necessary.
Secondary beam current expected to remain at ~50cps.
Now no beam for ~1hr.
10.15 Beam comes back
There was a minor delay to get the beam back from some accelerator issue (SRQ issue I am told)
F11 plastic rate is about 10 cps, still I can see nothing in AIDA low gain
Main exp. team confirms several 40Mg events within minutes, and makes jokes about old Nature paper with 10 days of
data to do that.
10.25 Trying to find AIDA's implants, using MIDAS Sort in online mode
Removed the variable degraders, one-by-one. Still nothing? (this is now circa file R7_36)
Is there a possibility that the "low gain" setting of the ASIC is too high energy for something like 40Mg?
We try to check the implant rate with the AIDA veto plastic
During this time, we moved degraders in and out, several times, watching the oscilloscope and visual scalers by
video link in F11
10.39 We check some scalers of the dE before AIDA (including F11 x plastic behind AIDA)
We can see a reasonable effect as expected for these detector count rates
The count rate never exceeds about 50 to 60 cps at maximum for dE
I don't trust MIDAS Sort in online mode
it is known to show factor 10 or less of the real rate, previously)
Check the data file R7_37 -> may show 1 to 2 Hz
We should decrease the low gain (heavy ion) threshold or dynamic range for the ASICs?
But DK is not an expert of that, and doesn't want to cause AIDA to cease functionality...
11.03 Checking runs later than R7_37 (i.e. _38 to _42)
Never see anything. R7_37 must have been taken with some amount of degraders in
We surmise that the ions are mostly punching through AIDA, owing to low Z.
11.05 We put in the 0.5 W + 1 mm Al degrader back, to see if we can get back the condition of _37...
R7_44 after a short delay should have this condition.
There can be 1 cps or something, though with small statistics it is hard to say...
It seems to be definitely non-zero though, compared to some runs like _38 to _42
11.10 Add the 1.0 W + 1mm Al (with the 0.5 W and 1 mm Al) degrader
R7_45 begins ~400 MB before this time.
We can see some kinds of definite hit events **with low stats** (1 to 2 Hz in several detectors in some data blocks)
It seems to be, if all degraders are out, that the beam punches through AIDA, and dE is below the thresholds
Of course, the count rate at F11 is only 10 cps, so we cannot conclude much with strong confidence...
11.17 Remove all variable degraders again (near halfway point of R7_46)
We need a decent LISE++ file to get a clue of where these ions are stopping...!
11.42 Beam is stopped because one of the cyclotron RF systems is down.
This occurs around the middle of file R7_50
12.40 Still waiting for beam. I try a more definitive analysis of R7_45
Partial disk analysis of file R7_45:
First part of data look like this:
*** DSSSD # 1 count: 4 old count: 2 dt: 1.06 s HEC rate: 1.89 Hz
*** DSSSD # 2 count: 1 old count: 0 dt: 1.06 s HEC rate: 0.94 Hz
*** DSSSD # 3 count: 0 old count: 0 dt: 1.06 s HEC rate: 0.00 Hz
*** DSSSD # 4 count: 0 old count: 0 dt: 1.06 s HEC rate: 0.00 Hz
*** DSSSD # 5 count: 0 old count: 0 dt: 1.06 s HEC rate: 0.00 Hz
*** DSSSD # 6 count: 10 old count: 10 dt: 1.06 s HEC rate: 0.00 Hz
Notice that we get 10 total counts in DSSD#6, and practically 0 in any other layer (2 in DSSD#1)
Now, as the analysis progresses, we do not increase the counts in DSSD#6, but we start to see events in other layers
*** DSSSD # 1 count: 128 old count: 128 dt: 343.81 s HEC rate: 0.37 Hz
*** DSSSD # 2 count: 115 old count: 115 dt: 343.81 s HEC rate: 0.33 Hz
*** DSSSD # 3 count: 91 old count: 90 dt: 343.81 s HEC rate: 0.26 Hz
*** DSSSD # 4 count: 41 old count: 40 dt: 343.81 s HEC rate: 0.12 Hz
*** DSSSD # 5 count: 13 old count: 13 dt: 343.81 s HEC rate: 0.04 Hz
*** DSSSD # 6 count: 12 old count: 12 dt: 343.81 s HEC rate: 0.03 Hz
*** ENTRY finish ends
Notice how only 12 counts in DSSD#6 (two new counts) but 128 counts in DSSD#1 (126 new counts).
We can conclude that with 3 mm Pb (fixed), and 0.5 mm W and 1.0 mm Al, some of the beam is stopping in DSSD #6, and mostly
punches through.
Then, when 1.0 mm W and 1.0 mm Al are added, we shift the implantation to the beginning of AIDA (or some in the air
before AIDA).
So, we should try the 1 mm W (+1 mm Al) and 0.3 mm W (+1 mm Al) once the beam returns.
13.34 Stop run 7.
Change the medium/low energy selection on ASIC control from 0x0 to 0x1 (from low to medium energy mode)
(Already, the high energy setting is 0x2 and we cannot decrease it)
Start run 8. It looks okay, though of course now data rate becomes much smaller.
13.36 Beam is now on again. F11 rate has decreased 1 order of magnitude (now it is 0 to 2 Hz)
14.00 As expected, data rate becomes quite low, as the low energy mode has typically many events (10kHz or so)
But now we don't see anything in the high energy mode as before
3 mm Pb remains in, and variable degraders are all out (mistake...we meant for some to be in)
Strange! But the beam at F11 does not seem to be the same rate as before the cyclotron issues...
Realized that someone was checking the beam at an earlier focal plane and that F11 has no beam...
(Post-dated note: forgot to hit "Start ASIC Readout" --- duh oops.
RUN 8 IS JUNK, AS NO ASIC READOUT BY USER ERROR (DK)
14.12 Stop run 8. Change the medium energy mode back to low energy mode of all ASICs. Restart as run 9.
But the merger data links don't alternate colors when I reload the merger screen. Is it bad?
Data rate is still very low, but that doesn't make much sense.
Okay, now I start ASIC Readout! Woohoo!
But it seems some magnetic dipole of BigRIPS must have an improper setting, explaining the 1 cps rate at F11...
15.33 Bias and leakage currents OK (attachments 9 & 10).
FEE64 temperatures OK (attachment 11).
15.40 SRIM 2013
145MeV/u (5800MeV) 40Mg + 3mm Pb
sigma 0.55 deg
ang X (str) 0.90 deg
assume Pb - DSSSD distance c. 2m => 2000 x tan(0.55 deg) ~ 17mm rms
consider reducing Pb - DSSSD distance |
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Sat Dec 12 02:12:17 2015, CG, AE, VH, RIKEN progress 9x
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Stripped down contents of AIDA NIM bins to only what is required by AIDA.
Now have BNC PB-5 pulser, sum and invert module, single and quad Caen HV supplies in the top crate and the MACBs in the bottom crate.
Removed were FIFO, leading edge discriminator and a quad coincidence module, all used in the DAQ integration.
Smallest dial on pulser potentiometer was round at an unlikely number, seems to have been knocked.
- connected to scope and consecutive values on the biggest dial does not produce integer multiples of the lowest setting -> needs sorting out for future pulser walkthroughs.
Tested tripped detector from Apr/May (BB18-1000 3131-11) with kaptons connected to nnaida1,3,5,8 (GND to nnaida1), +ve HV with braid to front strips via nnaida5 and core to back strips via nnaida3.
- biased to +150V with a stable leakage current of 9.5uA in a very warm room.
- stable for ~2mins then I_L jumped to 20uA and detector tripped.
- subsequently unable to successfully bias the detector. Trips on ramping up around 15-20V every time.
- no visible damage or broken bond wire.
Initial conclusion is this detector is broken (but see bellow). Then tried with another (BB18-1000 2977-15, pre-prod)
- encountered similar problems in that the detector tripped once at ~+50V and then kept tripping around +12V thereafter.
This was all carried out with the jumper combination already present from the end of the run in May - Lk1,3,5+7 had jumpers on on all FEEs, but we were unable to bias detector.
Removed all jumpers and 2977-15 biased successfully to ~75V (with 10.12 uA leakage current). Pulser resolution ~700 ch FWHM for NNAIDA 1 (p-side); 20 ch for NNAIDA2 (no DSSD connected)
Setting1:
- Add jumpers LK1 to nnaida1 (w/grounded Kapton cable), LK3 to nnaida3 (+75 V), LK1 and LK3 to nnaida5 (ref. 0V), and LK3 to nnaida8 (revB PCB). See attachment 1.
- Biased with 10.44 uA leakage current @ 75V
- About half of the Cu-braids with ground connections across FEEs are loose (clamps had snapped while moving table/mounting DSSD).
- Using 2015Apr30-diode-mod2 ASIC settings.
- Resolution of sample channels (FWHM): nnaida1: 320 ch, nnaida3: 500 ch, nnaida5: 280 ch, nnaida8: 180 ch.
Tried a couple more jumper settings:
- nnaida1: LK1+LK3, nnaida3: LK3, nnaida5: LK1+LK3, nnaida8: LK1+LK3: overcurrent with a couple of volts (short circuit, likely LK1 in nnaida8).
- nnaida1: LK1+LK3, nnaida3: LK3, nnaida5: LK1+LK3, nnaida8: LK3: detector trips (I>20uA) at about 18 V, and after tripping first time there is a steeper increase of I vs V (~20uA at ~ 9V).
Setting2:
- Same jumpers as setting 1: nnaida1: LK1, nnaida3: LK3, nnaida5: LK1+LK3, nnaida8: LK3.
- Connect all Cu-braid cables to ground the Cu blocks of first two rings of FEEs.
- The resolution in all FEEs improved to about 170ch FWHM, except for nnaida1 (with grounded Kapton cable): nnaida1: 310 ch, nnaida3: 170 ch, nnaida5: 180 ch, nnaida8: 160 ch. See attached sample spectra and waveforms.
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Wed Feb 18 05:49:29 2015, CG, AE, TD, PJC-S, Wed 18th Feb progress 15x
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18/02/15
1300: Error seen when trying to check ASIC settings. See Attachment #1. Power cycle removed error.
nnaida3 still performing much better than other three cards connected to detector (nnaida1,6,8). Why?
Noticed nnaida3 was connected to only adapter PCB which did not feature a metal shielding plate on the front?
Noise in other cards caused by possible short or capacitance between PCB pins and shielding plate?
-> Removed all shielding plates and no difference seen. Pulser peak widths all still approximately the same.
nnaida3+6 PCB grounds connected by thin braid, as well as nnaida1+8. These were all removed. No change.
1830: Still seeing errors when data is sent through them Merger, see attachments #2-6.
Attached heavy duty copper braiding in loop, connecting all nnaida PCBs in use. Improved FWHM of nnaida1 by factor of 2. No change in other nnaida.
Moved kapton and bias from nnaida3 to nnaida11 (same crate, next module along) and saw no appreciable difference in the spectra.
Changed voltages in PSUs for first 16 nnaida.
+5V -> +5.5V, -6V -> -6.5V, +7V -> +8V.
All +5.5V rails at 5.5V, however in PSU#1 (supplying inner FEE modules) -6.5V and +8V rails show variations of +- ~12mV and +- ~4mV respectively, between outlets.
Installed PSUs with updated voltages.
nnaida8 FWHM improved by factor of 2 but no difference in other nnaida.
Current configuration nnaida1,6,8,11. nnaida1+8 connected to p+n side, nnaida6+11 connected to n+n side.
Current FWHM: nnaida1 ~500ch, nnaida6 ~1500ch, nnaida8 ~600ch, nnaida11 ~120ch.
Update response from Patrick:-
Please see posting number 39 for ideas to improve noise and possible reasons why some FEE64 are quieter than others.
I think the SYNC problem is likely due to the version of VHDL perhaps not including the flush of buffers and with the widely different data rates. 224k against 3k.
This should improve with the VHDL update as I think the flush system is more efficient.
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Tue Nov 29 15:12:33 2016, CG, AE, TD, DK, Wednesday 30 November 13x
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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. |
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Tue Feb 17 06:32:24 2015, CG, AE, TD, Tues 17th Feb progress 22x
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17/02/15
1515: Installed detector BB18 2977-7 with 3 modified kapton cables, one unmodified (in nnaida1) with 207Bi source.
Bias voltage @ -100V with leakage current -11.6uA @ ambient temp of ~20oC.
nnaida1,3,6,8 connected to detector, all with shaping time of 2us and hold time 8us.
Slow comparator thresholds around 0x18 and fast comparators 0xf (see below images).
Pulser at 50,000 with x5 attenuator @ 25Hz. Both polarities supplied via use of Ortec 433A dual sum and invert amp.
nnaida1+6 p+n side, -ve bias. nnaida3+8 n+n side, ground.
nnaida3 most well behaved, with low rate similar to that of pulser rate and no missing channels. Waveforms look good.
Pulser peak has smallest FWHM @ ~150ch, compared to 1000s of ch for the other nnaida.
For comparison, nnaida7 (not connected to detector) has peak width of ~18ch FWHM.
nnaida1,6,8 have typical pulser peak widths of the order 1000-3000ch FWHM. Peak too broad in nnaida6 to be distinguishable from noise peak.
Waveforms from nnaida3 stable and as expected. nnaida1+6 slightly more variable and noisy.
Waveforms from nnaida8 see much greater noise and variability, including rail-to-rail transitions.
Increasing the pre-amp reference from 0x30 to 0x60, removes rail-to-rail transitions, but waveforms remain just as noisy.
1650: Successfully started Merge and Tape servers, writing data to disk.
Merge terminal window shows errors regarding Sync pulse timestamp sequence errors (see attachment #18).
1900: Installed Caen N1419 floating HV bias supply.
Connected to detector via nnaida3, positively biasing n-side through core with p-side as low V reference through braid. Saw no leakage current => open circuit.
After some problem solving found reversing the bias and negatively biasing p-side worked. Possible broken bond wires delivering bias on n-side.
Connected to nnaida8 (also positive bias to n-side) and found short circuit. Saw leakage current of 200uA (trip level) @ 5V.
Changed to negative polarity bias and connected to nnaida6 and saw sensible leakage current of -11.5uA @ -100V bias.
Spectra for each module showed FWHM for the pulser peaks to be: nnaida1 ~800ch, nnaida3 ~150ch, nnaida6 ~3000ch, nnaida8 ~1200ch.
FWHM in nnaida1 reduced by ~1/3, nnaida6 shows little change, nnaida8 reduced by ~1/2. nnaida3 shows no change, but in line with what was seen at DL. (w.r.t peak widths seen last night using Selena bias supply)
nnaida3 performing much better than other three cards connected to detector, but in line with what was seen at DL. Other 3 cards very noisy.
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Thu Feb 19 08:21:33 2015, CG, AE, TD, Thrus 19th Feb progress 39x
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19/02/15
1000: Check system gives same resolution as yesterday, removing only the Cu braiding connecting and grounding all adapter PCBs (also moved bias braid back to nnaida3).
Pulser FWHM in each FEE... nnaida1 ~800ch, nnaida3 ~110ch, nnaida6 ~2300ch, nnaida8 ~950ch. Rate in 6 and 8 ~5kHz per strip.
Re-added Cu braids, clipping on to LEMO connectors of adapter PCBs.
FWHM and rate/strip in nnaida1,3,6,8 now (respectively): ~600ch and 100Hz, ~120ch and 25Hz, ~2100ch and 6kHz, 1000ch and 6kHz. => small reduction in nnaida1+6
nnaida8 also has non-Gaussian pulser peaks.
No clear effect, but minor improvement and no negative effects mean we will keep Cu braids attached.
1045: Grounded nose to adapter PCB attached to nnaida7+8. No clear effect.
1055: Changed pre-amp reference settings in nnaida1+8.
nnaida1 0x30 -> 0x60. nnaida8 0xb2 -> 0x82.
No clear change. Reverted back to original settings.
1130: Changed to detector BB18 2977-20 and added 241Am (1uCi) and 207Bi (few uCi) sources 2cm from front of detector (see attached photos for arrangement).
Bias set at -100V with leakage current -10.9uA.
Pulser peak FWHMs for each nnaida are: #1 ~600ch, #3 ~150ch, #6 ~1300ch, #8 ~ 700ch. Minor improvement over previous detector.
1345: nnaida3 still much more well behaved than other nnaida. To test if kapton cables are source of issue, swapped kaptons for nnaida3+8 at FEE end.
Peak FWHMs and rates for nnaida3+8 having swapped cables are: #3 ~700ch and 300Hz, #8 ~200ch and 30Hz.
=> noise moved with kapton! Kaptons could be the issue. (For completeness, FWHM in nnaida1 ~800ch and nnaida6 ~1100ch.)
1435: Disconnected kaptons at detector end (still connected to FEE adapters).
Pulser FWHMs and rates/strip per strip now: nnaida1 - ~250ch and 25Hz, nnaida3 - ~120ch and 25Hz, nnaida6 - ~160ch and 25Hz, nnaida8 - ~120ch and 25Hz.
Waveforms for all nnaida looked similar and with little noise => no way of telling a 'bad' cable from a 'good' one, just from FEE + cable (without detector).
Current cable configuration/pairings: nnaida1-kapton A, 3-B, 6-C, 8-D.
Kapton B shows no alpha/beta spectrum from sources in 1.1.L, a problem which tracked across to nnaida8 when cables were swapped => suggesting break in cable for this channel.
Waveforms in all nnaida look relatively noise free (nnaida1 slightly noisier) and as expected.
1520: Changed some of the kaptons to check all were functioning properly. Kept nnaida3-kapton B combo as this was working as expected from DL tests.
Changed nnaida1 A->E (neither isolated), nnaida6 C->F, nnaida8 D->G.
After removal. noticed outgoing kaptons C+D did not have "Isolated" label on them (B does).
Without connecting new cables to detector, FWHMs and rates/strip in all nnaida ~130-150ch and ~25Hz, respectively.
1545: Connected kaptons to detector 2977-20 and with alpha+beta sources 2cm in front of detector.
Bias connected via nnaida6 (-ve core) and nnaida3 (low V ref braid). nnaida3+8 grounded.
nnaida-kapton pairings now as follows: nnaida1-kapton E, 3-B, 6-F, 8-G.
Pulser FWHMs and rates/strip now: nnaida 1 - ~190ch and ~60Hz, nnaida3 - ~250ch and ~60Hz, nnaida6 - ~180ch and ~40Hz, nnaida8 - ~350ch and ~100Hz.
Above rates seem sensible considering we have 25Hz pulser going into FEEs, plus alpha and beta sources.
MUCH better than previous! (apart from nnaida3 which remains about the same)
Further more, rate spectrum for each nnaida shows slow decline in rate with increasing bin number. Expected as 241Am placed centrally and outer strips will see lower rate as more alphas are stopped due to path travelled.
1645: Saving data to file with system configuration: Am+Bi sources, EBFG kaptons, Cu braid grounding between adapters and nose grounded to nnaida7+8 adapter.
File - /TapeData/Feb2015/Run1_*.gz.
Run stopped at 1715.
17:40: Providing one pulser signal to BRIKEN VME crate, which is in the same main bias supply as AIDA. Start a new run to check things are not changed
File - /TapeData/Feb2015/Run3_*.gz.
19.42 File /TapeDate/R3_1.gz closed (985+303Mb)
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Fri Feb 20 10:04:29 2015, CG, AE, TD, Fri 20th progress
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20/02/15
1400: Measured leakage current as function of bias V for the Caen 1419B high voltage supply and detector BB18 2977-20. (see attachment #1)
1500: Modified MACB installed and connected to BELEN and RIBF DAQs (see attachment #2 for signal flow diagram).
Increased noise in several nnaida, possibly due to grounding issues introduced by inclusion of modules for other DAQs. |
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Sat Feb 21 06:37:52 2015, CG, AE, TD, Sat 21st Feb progress 6x
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21/02/15
1230: Developing the software to check synchronisation between DAQs. Below line runs program on aidas1 - sends data from TapeServer to BELEN.
./DataRelayFilter -n 10.32.6.196 -p 10307 -I 2
1500: Investigating pulser peak FWHMs as function of bias voltage.
Constant shaping time of 0x3, slow comp thresh 0x20, fast comp thresholds of 0xff. All other setting as standard. Detector MSL BB18 2977-20.
Results summarised in table directly below.
| |
Pulser peak FWHM (ch) |
| |
|
nnaida1 |
nnaida3 |
nnaida6 |
nnaida8 |
| Bias (v) |
Leakage current (uA) |
1.9.L |
2.10.L |
1.9.L |
2.9.L |
2.10.L |
3.11.L |
2.10.L |
3.9.L |
| 75 |
10.700 |
166 |
133 |
174 |
156 |
176 |
168 |
271 |
285 |
| 100 |
10.905 |
165 |
131 |
174 |
158 |
168 |
166 |
272 |
285 |
| 125 |
11.090 |
167 |
151 |
175 |
158 |
167 |
160 |
271 |
285 |
| 150 |
11.410 |
179 |
140 |
178 |
158 |
169 |
166 |
271 |
283 |
| 200 |
12.275 |
----- |
------ |
175 |
159 |
------ |
------ |
272 |
286
|
At bias of -200V nnaida1+6 stopped outputting data but continued to produce SYNCs. Good event rate dropped from ~few thousand per sec to ~300 per sec.
After returning bias to -150V, nnaida1+6 started producing data again. No effect was seen in nnaida3+8.
nnaida8 peaks are not particularly Gaussian in shape. Look more skewed with one rolling edge and one side a relatively sharp drop.
No obvious trends with changing bias voltage. Will return to -100V.
1545: Investigating pulser peak FWHMs as function of shaping time.
Bias returned to -100V, with leakage current 11.000uA.
Settings for all nnaida: slow comp thresh = 0x20, fast comp thresh = 0xff, hold time = 0x4 if shaping time <= 0x8, 0x8 if shaping time > 0x8.
| Pulser peak FWHM (ch) |
| |
nnaida1 |
nnaida3 |
nnaida6 |
nnaida8 |
| Shaping time (Hex) |
1.9.L |
2.10.L |
1.9.L |
2.9.L |
2.10.L |
3.11.L |
2.10.L |
3.9.L |
| 0x0 |
254 |
172 |
151 |
160 |
172 |
164 |
287 |
293 |
| 0x1 |
237 |
167 |
176 |
172 |
184 |
176 |
328 |
367 |
| 0x2 |
193 |
146 |
184 |
168 |
180 |
175 |
306 |
321 |
| 0x4 |
149 |
119 |
171 |
152 |
159 |
155 |
252 |
261 |
| 0x8 |
129 |
122 |
154 |
147 |
139 |
137 |
195 |
201 |
| 0xb |
133 |
129 |
160 |
148 |
137 |
135 |
184 |
188 |
| 0xf |
139 |
139 |
169 |
159 |
141 |
142 |
184 |
183 |
Visual 'analysis' suggested 0xb to be the optimal value so used that as shaping time in further tests.
(Graph to follow)
1900: Investigating effect of changes to slow comparator thresholds.
Settings: bias = -100V, hold timing = 0x8, shaping time = 0xb, fast comp thresholds = 0xff. Otherwise, standard settings.
| Position of threshold (ch) |
| |
nnaida1 |
nnaida3 |
nnaida6 |
nnaida8 |
| Slow comp threshold |
1.9.L |
2.10.L |
1.9.L |
2.9.L |
2.10.L |
3.11.L |
2.10.L |
3.9.L |
| 0x20 |
32164 |
32378 |
33102 |
32990 |
32427 |
32261 |
33433 |
33433 |
| 0x18 |
32271 |
32481 |
32997 |
32890 |
32529 |
32369 |
33334 |
33349 |
| 0x10 |
32389 |
32589 |
32898 |
32788 |
32648 |
32449 |
33225 |
33260 |
| 0xd |
32420 |
32596 |
32858 |
32755 |
------ ? |
----- ? |
----- ? |
----- ? |
With threshold at 0xd, threshold position was very hard to determine for nnaida6+8, assume discirminator is running in the noise. Will ignore data for 0xd.
Assuming central position of 32768 and energy per channel of 0.7 keV, below table gives approximate position of threshold in keV.
| Position of threshold (ch) |
| |
nnaida1 |
nnaida3 |
nnaida6 |
nnaida8 |
| Slow comp threshold |
1.9.L |
2.10.L |
1.9.L |
2.9.L |
2.10.L |
3.11.L |
2.10.L |
3.9.L |
| 0x20 |
423 |
273 |
234 |
155 |
239 |
355 |
467 |
467 |
| 0x18 |
348 |
201 |
160 |
85 |
167 |
279 |
396 |
407 |
| 0x10 |
265 |
125 |
91 |
14 |
84 |
223 |
320 |
344 |
Thus (very roughly), between 0x10 and 0x20, the above table shows the threshold moving by about 10 keV per increment in the threshold.
With the threshold at 0x10, the data rate show on the TapeServer window was ~3Mb/s (uncompressed?).
This was with 1 detector (BB18 2977-20) connected to 4 FEE64s with above settings, a 25Hz pulser and 241Am+207Bi sources (activities in ELog entry 40).
The Good Events rate averaged around 30,000-60,000/s per FEE64 card, with only a few Pause/Resumes coming through.
Example stats screen and hit patterns included below for final configuration. |
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Sun Feb 22 06:47:23 2015, CG, AE, TD, Sunday 22 February 2015
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22/02/15
am Testing various grounding configurations for the connection between the DSSSD and the FEE64 modules.
15.45 Obtaining error messages from Merger TTY console (see attachment 1)
1700: Summary of AM testing of grounding configurations.
Set up system as it was when we left last night to check reproducibility -> peak FWHMs all same to within 10%.
Throughout tests yesterday, nnaida8 was consistently worse than the other nnaida, why? Can it be improved?
Most obvious difference between 8 and the rest was that the nose was grounded through nnaida8.
Removed nose grounding cable and left to hang -> no appreciable difference in FWHMs.
It was then attached to the Cu piping using a croc clip -> no change.
Connected to nnaida6 -> no change.
The heavy duty Cu braiding was removed from all nnaida and the pulser FWHM in all nnaida increase significantly.
=> clearly the braiding is helping.
Put Cu braiding back in place and added shielding plates to nnaida1,3,8 (kapton in way on nnaida5/6, also useful as a reference point).
Each shield plate was fit onto the set screws with two spacers and sat over the kaptons, black tape was put over the vias to prevent them touching the plates.
No change with respect to the first measurements this morning.
=> the grounding changes implemented today have had no effect at the current noise level, but that is not to say they may not have an effect in combination with production detectors, new kaptons etc.
1715: Tested the new USB mains power switches for function (without load). All seem to function correctly and are controllable from the RPi.
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Wed Apr 22 08:50:59 2015, CG, AE, TD, Wednesday 22nd April progress
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22/04/15
1230: Solved problem (empty spectra despite changing modules) with nnaida5 noted in previous progress update.
During Feb tests, nnaida5 was very noisy compared to other nnaida => switched it to medium energy range to effectively turn it off.
This was saved in the default setting so this same configuration was loaded on startup.
Changed back to low energy mode, giving nnaida5 equally good performance as other nnaida, and altered system settings save file.
1630: Added heavy duty ground cabling to the copper blocks holding the adapter PCBs in loop around inner FEE modules with connections out to further out ones.
Removed PC-S copper braids with clippy ends.
Put electrical tape over the surrounding aluminium cooling crate to prevent electrical contact with that.
Using BB18 detector 2977-20 connected to FEEs 1, 3, 5, 8 using kaptons labelled E, B, F, G respectively.
The FEEs connected to the detector saw much higher low-energy noise levels and typical FWHM of pulser peak increased by ~100ch to ~250ch.
Reduced shaping time and increased thresholds but saw no improvements.
Refitted PC-S clippy copper braids in loop around inner most FEE modules and saw all pulser FWHM reduced to the ~130-150ch we saw during Feb tests (see attachments 1-4).
Suggests poor electrical connection between adapter PCBs and copper blocks.
1840: Added 4 new FEEs (nnaida25+26, 29+30) to system for use with new adapter PCBs accepting LEMO inputs from BigRIPS DAQ.
Edited /MIDAS/config/TclHttpd/aidas1@8015/startup.tcl to make system contain new FEEs.
Created new ASIC setting save file @ /MIDAS/DB/2015Apr22-extraInput.
nnaida25,29 have positive pre-amp polarity and nnaida26,30 have negative pre-amp polarity (along with other associated setting).
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Thu Apr 23 10:27:59 2015, CG, AE, TD, Thursday 23rd April progress
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23/04/15
1800: Spent majority of the day moving AIDA forward and into EURICA.
So far everything seems to fit very well, we have just noticed a few points of possible mechanical conflict that should be watched when inserting/removing AIDA into EURICA
- Overhead LN2 pipes are lower than the top of the FEE tower. These have been loosely cable tied to some other cables to keep them away from AIDA. Need to make sure they don't move upon filling of LN2
- Yellow water pipe at front of AIDA may be pinched by EURICA structure upon full closure. Will check first time we close.
- Horizontal screw at base of nose is the most rearward point of contact and means AIDA cannot be inserted further than this. Already sufficiently far into EURICA so not a problem in that sense.
- Table itself can be moved to within ~5cm of EURICA structure without disturbing cabling along floor too much or touching rails.
- Front leg fits easily under EURICA structure.
Due to the number and file size of the photos, I can't upload them here so have made them available at:
https://www.dropbox.com/sh/ho1c0ocgc7rjji4/AADNsFZjSi6-Tx5CfxBt1PKUa?dl=0 |
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Sun Nov 27 16:29:51 2016, CG, AE, DK, Monday 28 November 12x
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01.28 Beam stopped temporarily.
~750MB into R26_38.
Bias and leakage currents ok, as are FEE temps (attachments 1-3).
Removed 1mm fixed Al degrader from in front of PE wall.
> Now have 3mm PB downstream of 2nd MUSIC + 1.3mm W and 2mm Al.
01.35 Beam returned.
~1/2 way through R26_39.
06.27 LN2 fill.
Run R26 stopped successfully @ R26_97.
07.41 After a couple of failed attempts, R27 successfully started.
07.44 Resync pulse sent from BRIKEN as nothing is seen on sync monitor.
07.58 Bias and leakage currents ok (attachments 4+5).
09.00 Beam stopped for stripper foil change.
1.4GB into R27_15.
Will continue with R27.
9.13 Changed degraders and shields in F11
Pb bricks between MUSIC 1 and MUSIC 2 were not changed, but we confirmed their positions and size of the
window.
Width of window is 7.5 cm, height of window is larger than the MUSIC windows, depth of Pb to beam is 10 cm
New Pb bricks placed downstream of the variable degrader
Width of window is ~12 cm, height of window is larger than the MUSIC windows, depth of Pb to beam is 20 cm
3 mm Pb degrader was moved from the front of the PE wall to the front of the upstream Pb shield
(between MUSIC 1 and 2 as described above)
9.15 BigRIPS run 1049
AIDA runs R27_15 (end portion) and all of _16, and the start of R27_17 include beam-off time.
The start of R27_18 should coincide nearly with beam on.
10.00 System-wide checks OK *except* clock status errors from amongst nnaida5, 7, 8, 15 & 16 - bit 2 always set
and ADC calibration fail for nnaida13
10.50 BigRIPS run 1050 begins
11.02 We checked the timestamping, and it looks like BRIKEN and AIDA are not synchronized. So we will restart runs.
11.08 R28_00 at AIDA started
11.12 All syncs look good now.
11.16 BigRIPS data file 1051
12.08 Visual scalers - see attachment 6
12.12 SyncCheck OK - see attachment 7
12.22 BigRIPS data file 1052
14.19 Sync of AIDA shows two peaks with both BRIKEN and BigRIPS, so we stop the run.
BigRIPS should be starting a new run soon, so we will wait for them to start the new run
14.31 New AIDA run R29_0; started directly after BigRIPS 1054 (14.29 start)
16.00 Offline analysis of R27_1 and R28_14 was done with MIDAS. See their respective eLog entries
The main difference between these runs is R27 has the 3 mm Pb closer to AIDA than R28
The number of implants to AIDA seems about a factor 2 higher with the 3 mm Pb closer to AIDA
During the next chance to enter F11, we should shift the 3 mm Pb closer to AIDA again, all other things being
equal (BRIKEN impact?!)
18.22 Stop the run (R29_47) in preparation for LN2 fill.
19.30 Ambient temperature +25.7 deg C, dp.p. +0.2 deg C, RH 18.4%
DSSSD bias & leakage currents OK - see attachments 8 & 9
19.35 Beam is stopped to exchange strippers. Main exp. team also enters the radiation area for ~20 min
Remove the 3mm Pb degrader (it was on the upstream side of the Pb shield between MUSIC 1 and MUSIC 2)
Add 8 mm Al to the front of the PE wall. This should be an equivalent dE for 40Mg we calculated.
19.59 DAQ starts (RIBF03R1/R30)
20.05 SyncCheck OK
20.06 Beam back (R30_1)
BigRIPS data file 1060
Degrader ( 8mm Al ) fixed + ( 0.3mm W/1mm Al + 1.0mm W/1mm Al ) variable
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