00.46 34Ne stopped for 36Ne setting (R19_37).
DAQ kept running as I was upstairs getting some food.
Stopped at R19_45.
00.57 BigRIPS change to 36Ne setting. Start file 0196. Still tuning.
Temps ok.
Leakage currents and bias ok (see attachment 1).
01.32 R20 started on 36Ne setting.
BigRIPS file 0197 (started @ 01.30).
BRIKEN file
02.23 Beam stopped to F11. End of R20_12.
02.28 Beam returned to F11. Start of R20_14.
BigRIPS file 0198.
02.48 BRIKEN file 48 started.
Start of R20_19.
All system checks passed except nnaida1 fails global clocks 6.
Temps and leakage currents ok.
03:28 BigRips file 0199 (started at 03:27)
AIDA at end file R20_28
BRIKEN file 47 started
All system wide checks ok.
Temps and leakage currents ok
04:36 BigRIPS file 0200
Coincides with end of AIDA file R20_46
BRIKEN file 48
All system wide checks ok
Temps and leakage currents ok
ASIC load check all ok
04:59 BigRips run 0201 (Started at 4:45)
Corresponding AIDA file for start of BigRips run is R20_49
BRIKEN file 49
Corresponding AIDA file for start of BRIKEn is R20_52
05:33 System wide checks all ok
Temperatures, biases and leakage currents ok (seet attachment 2)
05:44 BigRips start run 0202
Start of AIDA file R20_64
BRIKEN file 50
System wide checks passed
00.46 34Ne stopped for 36Ne setting (R19_37).
DAQ kept running as I was upstairs getting some food.
Stopped at R19_45.
00.57 BigRIPS change to 36Ne setting. Start file 0196. Still tuning.
Temps ok.
Leakage currents and bias ok (see attachment 1).
01.32 R20 started on 36Ne setting.
BigRIPS file 0197 (started @ 01.30).
BRIKEN file
02.23 Beam stopped to F11. End of R20_12.
02.28 Beam returned to F11. Start of R20_14.
BigRIPS file 0198.
02.48 BRIKEN file 48 started.
Start of R20_19.
All system checks passed except nnaida1 fails global clocks 6.
Temps and leakage currents ok.
03:28 BigRips file 0199 (started at 03:27)
AIDA at end file R20_28
BRIKEN file 47 started
All system wide checks ok.
Temps and leakage currents ok
04:36 BigRIPS file 0200
Coincides with end of AIDA file R20_46
BRIKEN file 48
All system wide checks ok
Temps and leakage currents ok
ASIC load check all ok
04:59 BigRips run 0201 (Started at 4:45)
Corresponding AIDA file for start of BigRips run is R20_49
BRIKEN file 49
Corresponding AIDA file for start of BRIKEn is R20_52
05:33 System wide checks all ok
Temperatures, biases and leakage currents ok (seet attachment 2)
05:44 BigRips start run 0202
Start of AIDA file R20_64
BRIKEN file 50
System wide checks passed
6:15 Operators call...R20_72 1.5 GB
The BigRIPS system display PC looks like it crashed
6:22 2017-04-01 06:21:19 BigRIPS run 203 starts
AIDA run 20_74 is about 25% started
BRIKEN run 51
6:40 Phone rings, AIDA run R20_79 just started
Stripper foil seems to have been changed
6:43 2017-04-01 06:42:03 BigRIPS starts a new run
R20_79 is 75% the way through.
BRIKEN run 52
System checks passed.
7:09 PPACs are discharging very frequently.
7:39 counted 8 discharges. It's about once in four minutes. An acceptable discharge rate is several times in
one shift.
Firstly, each discharge damages the PPAC. Even 10 to 20 discharges can easily cause dead regions of cm size.
Secondly, with the frequency of discharge, we are now missing like as much as 25% of all events (at least
at a given PPAC)
As the detector becomes more damaged, it can discharge more frequently.
Moving the detector's position slightly can help to alleviate the problem by putting the beam on a fresh region
Anyway, as for a parasitic run they can do whatever they want, but it seems they are mis-operating the PPACs
Basically the voltage is too high or the detector is too old and needs to be replaced.
7:40 2017-04-01 07:40:12 BigRIPS run 205 begins
AIDA run R20_94 is at 721 MB at 7:40
BRIKEN run 53
System-wide checks are okay
8:08 Bias and Temp attachments 3 & 4 (bias_1_.png and temp_1_a.png)
9:01 BigRIPS run 206 2017-04-01 09:01:06
AIDA run R20_115 is at 600 MB at 9:01
BRIKEN run is 54
System-wide checks
9:39 Now that the students went home and some more experienced beam physicists are on shift, the PPAC discharge rate
goes down to ~2x per hour.
10:02 New BigRIPS run at 2017-04-01 10:01:40 number 0207
AIDA run R20_130 was at 1.9 GB at 10:02..
BRIKEN run 55
System-wide checks passed
(I went upstairs for a break...it seems that the beam got turned off at some point)
10:55 Phone call, and I hear the chime for the beam coming back.
10:56 BigRIPS starts run 0208 2017-04-01 10:56:06
AIDA run R20_145 has just started at 10:56
BRIKEN run was not restarted and continued as run 55
System-wide checks are okay
11:02 We checked that the synchronization looks okay.
11:58 Noticed that BigRIPS started a new run at 2017-04-01 11:56:42, run 0209
AIDA run R20_160 should overlap about 50% with this run.
BRIKEN run is 56
System wide checks performed.
Attached are Biases and Temperatures as 5 & 6 ("bias_1_b" ; "temp_1_b")
12:58 BigRIPS starts run 0210 at 2017-04-01 12:57:21
AIDA run R20_176 was 422 MB at 12:57
BRIKEN 57
Pass system-wide checks
14:30 beam current has been fluctuating for awhile
14:50 BigRIPS started a new run 0212 2017-04-01 14:44:18
R20_203 was at 1.2 GB at 14:44
BRIKEN run 58
System checks okay
15:18 Phone rings. RF is down so the beam stopped.
R20_212 is at 500 MB at 15:19
15:57 Phone rings again.
16:37 BigRIPS start run 0214
Start of AUDA file R20_232
BRIKEN run 59
System wide check all ok
16:53 Biases and leakage currents ok (See attachment 7)
17:36 BigRips start run 0215
Strt of AIDA file R20_247
BRIKEN start run 60
System wide checks all ok
Temperatures all ok
18:04 BigRips stop to change gas stripper foil
AIDA file R20_254
18:09 BigRips start run 0216
AIDA file R20_255
BRIKEN start file 61
System wide checks all ok
6:15 Operators call...R20_72 1.5 GB
The BigRIPS system display PC looks like it crashed
6:22 2017-04-01 06:21:19 BigRIPS run 203 starts
AIDA run 20_74 is about 25% started
BRIKEN run 51
6:40 Phone rings, AIDA run R20_79 just started
Stripper foil seems to have been changed
6:43 2017-04-01 06:42:03 BigRIPS starts a new run
R20_79 is 75% the way through.
BRIKEN run 52
System checks passed.
7:09 PPACs are discharging very frequently.
7:39 counted 8 discharges. It's about once in four minutes. An acceptable discharge rate is several times in
one shift.
Firstly, each discharge damages the PPAC. Even 10 to 20 discharges can easily cause dead regions of cm size.
Secondly, with the frequency of discharge, we are now missing like as much as 25% of all events (at least
at a given PPAC)
As the detector becomes more damaged, it can discharge more frequently.
Moving the detector's position slightly can help to alleviate the problem by putting the beam on a fresh region
Anyway, as for a parasitic run they can do whatever they want, but it seems they are mis-operating the PPACs
Basically the voltage is too high or the detector is too old and needs to be replaced.
7:40 2017-04-01 07:40:12 BigRIPS run 205 begins
AIDA run R20_94 is at 721 MB at 7:40
BRIKEN run 53
System-wide checks are okay
8:08 Bias and Temp attachments 3 & 4 (bias_1_.png and temp_1_a.png)
9:01 BigRIPS run 206 2017-04-01 09:01:06
AIDA run R20_115 is at 600 MB at 9:01
BRIKEN run is 54
System-wide checks
9:39 Now that the students went home and some more experienced beam physicists are on shift, the PPAC discharge rate
goes down to ~2x per hour.
10:02 New BigRIPS run at 2017-04-01 10:01:40 number 0207
AIDA run R20_130 was at 1.9 GB at 10:02..
BRIKEN run 55
System-wide checks passed
(I went upstairs for a break...it seems that the beam got turned off at some point)
10:55 Phone call, and I hear the chime for the beam coming back.
10:56 BigRIPS starts run 0208 2017-04-01 10:56:06
AIDA run R20_145 has just started at 10:56
BRIKEN run was not restarted and continued as run 55
System-wide checks are okay
11:02 We checked that the synchronization looks okay.
11:58 Noticed that BigRIPS started a new run at 2017-04-01 11:56:42, run 0209
AIDA run R20_160 should overlap about 50% with this run.
BRIKEN run is 56
System wide checks performed.
Attached are Biases and Temperatures as 5 & 6 ("bias_1_b" ; "temp_1_b")
12:58 BigRIPS starts run 0210 at 2017-04-01 12:57:21
AIDA run R20_176 was 422 MB at 12:57
BRIKEN 57
Pass system-wide checks
14:30 beam current has been fluctuating for awhile
14:50 BigRIPS started a new run 0212 2017-04-01 14:44:18
R20_203 was at 1.2 GB at 14:44
BRIKEN run 58
System checks okay
15:18 Phone rings. RF is down so the beam stopped.
R20_212 is at 500 MB at 15:19
15:57 Phone rings again.
16:37 BigRIPS start run 0214
Start of AUDA file R20_232
BRIKEN run 59
System wide check all ok
16:53 Biases and leakage currents ok (See attachment 7)
17:36 BigRips start run 0215
Strt of AIDA file R20_247
BRIKEN start run 60
System wide checks all ok
Temperatures all ok
18:04 BigRips stop to change gas stripper foil
AIDA file R20_254
18:09 BigRips start run 0216
AIDA file R20_255
System wide checks all ok
18:25 BRIKEN start file 61
AIDA file R20_259
BRIKEN had to restart the computer so a resync needed to be done
19:07 BigRips start file 0217
AIDA on file R2-_270 (End of file)
BigRips reducing beam intensity to calibrate the beam current
19:12 Back to normal BigRips condition
Al degrader 1mm is removed
BigRips run 0218 (started at 19:11)
AIDA file R20_271
BRIKEN start file 62
System wide checks ok
20:06 Bias and leakage currents ok
Temperature ok
20:12 BigRips start run 0219
Start of AIDA file R20_287
BRIKEN starts file 64
System wide checks all ok
ASIC load check ok
21:12 BigRips start run 0220
AIDA file R20_301
System wide checks ok
BRIKEN starts file 65
22:12 BigRips stopped to change stripper foils
End of AIDA file R20_315
22:20 BigRips start run 0220
End of AIDA file R20_317
System wide checks and temperatures ok
BRIKEN start file 66
23:08 Biases and leakages ok
23:10 BigRips start run 0222
End of AIDA file R20_329
BRIKEN start file 67
System wide checks all ok |