Fixed, e768s, Mon Jul 29 07:16:39 2019, Chloe & Teodora, RUN, General, LiF, Screenshots run 156_2 20x
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Fixed, e768s, Mon Jul 29 08:07:05 2019, Faïrouz & Andres, RUN, General, LiF, Beam-profile and scalers (run156) @ 8h07
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Fixed, e768s, Mon Jul 29 11:05:19 2019, Faïrouz & Andres, RUN, General, LiF, Screenshots run 156 @ 11h05 20x
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Fixed, e768s, Mon Jul 29 11:48:13 2019, Faïrouz & Andres & Sylvain, RUN, General, LiF, The beam intensity decreased to 2.4e6 pps due to instabilities in the source
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| The operators are trying to stabilize the ECR source before trying to optimize the beam |
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Fixed, e768s, Mon Jul 29 13:46:11 2019, Faïtrouz, Nicolas & Freddy, RUN, General, LiF, Beam intensity increased to 7e6 pps
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Fixed, e768s, Mon Jul 29 15:20:50 2019, Sylvain Andres, Freddy, Adrien, Franck, BEAM, General, LiF, Beam profile after beam intensity obtimisation
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| Beam recover at around 15:00 after beam optimisation by PCP |
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Fixed, e768s, Mon Jul 29 15:58:53 2019, Freddy, Sylvain, BEAM, General, N/A, Beam profile and scaler r156
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| beam down to 3.4*10^6 pps at 16h00 (or VAMOS 200 pps) |
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Fixed, e768s, Mon Jul 29 17:49:18 2019, Freddy, Sylvain, RUN, General, LiF, Beam status
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| At about 17:15 beam suddenly stopped. PCP operators are investigating the issue. |
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Fixed, e768s, Mon Jul 29 18:59:51 2019, OttoRun, RUN, General, LiF, Run158
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*************************
Run : 158
*************************
Start at 2019-07-29 18:59:00.751661
15O beam
Brho = 0.556 Tm
target LiF thick number 1
OR VAMOS 474
OR Mugast 106
Fag 133
beam intensity XX
TRIGGERS:
MG BACK
MG 90
MUST2
VAMOS%10
BF2%100
restart after VAMOS optimization
Stop at 2019-07-30 11:04:58.183397
Stop comment: changing AGATA 01B parameter file |
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Fixed, e768s, Mon Jul 29 19:49:19 2019, Freddy, Sylvain, Nicolas, BEAM, General, LiF, Run 158 : Beam profile after beam tuning
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Below is the beam profile and the scaler corresponding to the beam after optimisation
Edit : beam intensity is strongly fluctuating : current intensity is 2 10⁶ |
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Fixed, e768s, Mon Jul 29 22:00:00 2019, Freddy, Sylvain, BEAM, General, LiF, Scaler Evolution run 158
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Evolution of scaler during run0158 _ from 19h to 24h00
--> Beam extremely unstable from zero to 10**7 pps (for not more than 5 min).
--> Several moment without beam, either lost at C0 or trying to optimize. |
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Ongoing, e768s, Mon Jul 29 22:50:43 2019, Sylvain & Freddy, ONLINE, General, LiF, Screenshots run 158 @ 22h05 19x
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Fixed, e768s, Tue Jul 30 01:20:21 2019, Jenn & Franco, BEAM, General, LiF, Beam intensity, profile check and SUMMARY night
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In run 158 at around 01:00am PCP took the beam to try to optimize it. We got the beam back after ~15 minutes.
Beam intensity ~1.2e7
OR MUGAST ~ 160
OR VAMOS ~ 650
30 minutes later: comparing the actual beam profile with the previous ones it looks like the beam has shifted on the horizontal axis (before the centroid was -1.9, now it is -3.4).
At the same time we noticed an increase in the AGATA counting rate (~ 35k). AGATA itself is not very stable, each now and then all the detectors go in back pressure for few
seconds and then they come back to the normal status. Moreover we see more counts on the second line in the correlation matrix (see figure attached). We think that maybe
with the last optimization the beam is slightly touching somewhere out of the target.
At 02:15am there was a problem with the vacuum on the PCP side so the beam went off. We wait for a guy to come in ~45min and solve this issue or understand WThell is happening.
RUN 158 won't be stopped to avoid DAQ problems.
TO UNDERSTAND: even after beam stopped 30 min ago, OR Vamos is still counting ~100 Hz while AGATA and MUGAST are counting nothing. |
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Fixed, e768s, Tue Jul 30 04:04:27 2019, Jenn & Franco, RUN, General, LiF, Beam back at 4.00 h
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We had the beam back at 4.00 a.m.
Beam profile and intensity checked: 1.2e7
OR VAMOS ~ 630
OR MUGAST ~ 170
OR AGATA ~ 35k
The AGATA rate is still very high. |
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Fixed, e768s, Tue Jul 30 04:25:49 2019, Jenn & Franco & Teodora, BEAM, General, LiF, Beam intensity, profile check and SUMMARY night
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This is what we were seeing in agata. We think it might be possible we were having a bit of beam implanted somewhere. We called PCP to check.
| Jenn & Franco wrote: | In run 158 at around 01:00am PCP took the beam to try to optimize it. We got the beam back after ~15 minutes.
Beam intensity ~1.2e7
OR MUGAST ~ 160
OR VAMOS ~ 650
30 minutes later: comparing the actual beam profile with the previous ones it looks like the beam has shifted on the horizontal axis (before the centroid was -1.9, now it is -3.4).
At the same time we noticed an increase in the AGATA counting rate (~ 35k). AGATA itself is not very stable, each now and then all the detectors go in back pressure for few
seconds and then they come back to the normal status. Moreover we see more counts on the second line in the correlation matrix (see figure attached). We think that maybe
with the last optimization the beam is slightly touching somewhere out of the target.
At 02:15am there was a problem with the vacuum on the PCP side so the beam went off. We wait for a guy to come in ~45min and solve this issue or understand WThell is happening.
RUN 158 won't be stopped to avoid DAQ problems.
TO UNDERSTAND: even after beam stopped 30 min ago, OR Vamos is still counting ~100 Hz while AGATA and MUGAST are counting nothing. |
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Fixed, e768s, Tue Jul 30 04:40:18 2019, Jenn & Franco & Teodora, RUN, General, LiF, Beam back at 4.00 h
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Due to the high rate of AGATA and Mugast (probably due to some implantation) we asked the PCP to readjust the beam.
They centered it a bit more on the profiler and now it looks better. Attached are the new rates.
OR VAMOS ~ 620
OR MUGAST ~ 170
OR AGATA ~ 7k
| Jenn & Franco wrote: | We had the beam back at 4.00 a.m.
Beam profile and intensity checked: 1.2e7
OR VAMOS ~ 630
OR MUGAST ~ 170
OR AGATA ~ 35k |
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Fixed, e768s, Tue Jul 30 05:32:33 2019, Teodora & Franco, RUN, General, LiF, Screenshots run 158 - 5:30h + beam profile at 6:00h 20x
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| Scalers and beam profile measurement taken at 6:00 h. |
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Fixed, e768s, Tue Jul 30 07:49:09 2019, Teodora & Franco, RUN, General, LiF, Check beam intensity and profile run158 h 8:00
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Fixed, e768s, Tue Jul 30 11:08:30 2019, OttoRun, RUN, General, LiF, Run159
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*************************
Run : 159
*************************
Start at 2019-07-30 11:07:33.907674
15O beam
Brho = 0.556 Tm
target LiF thick number 1
OR VAMOS 653
OR Mugast 156
Fag 206
beam intensity 1.3e7 pps
TRIGGERS:
MG BACK
MG 90
MUST2
VAMOS%10
BF2%100
Stop at 2019-07-30 16:22:08.584979
Stop comment: |
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Fixed, e768s, Tue Jul 30 15:47:46 2019, Nicolas, BEAM, General, , Beam stopped since 11h30
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| vacuum problem in CSS1 |
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