|
Fixed, e744s, Mon Apr 15 04:34:25 2019, Fredy, Magda, Mihai, Jaromir, RUN, Hardware, CH2, Beam interruption /N2 leak/
|
Alarm (probably N2) appeared 4:30, beam was stopped at 4:34 with an announcement by PCP.
Beam back @ 5:00 |
Fixed, e768s, Tue Jul 30 01:20:21 2019, Jenn & Franco, BEAM, General, LiF, Beam intensity, profile check and SUMMARY night 
|
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. |
|
Fixed, e768s, Tue Jul 30 04:25:49 2019, Jenn & Franco & Teodora, BEAM, General, LiF, Beam intensity, profile check and SUMMARY night
|
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. |
|
|
Fixed, e768s, Wed Jul 17 01:42:46 2019, mugast, VAMOS, General, LiF, Beam intensity versus Trigger Vamos
|
Masque mobile at +7 mm
Beam: 10^5 pps, Fag:10, Trigger VAMOS:10
Beam: 8.10^5 pps, Fag:15, Trigger VAMOS:15
Beam: 10^7 pps, Fag:241, Trigger VAMOS:271 |
|
Fixed, e768s, Sat Jul 20 19:24:31 2019, Faïrouz & Sylvain, RUN, General, LiF, Beam intensity is decreasing.
|
The beam intensity decreased by half since 19h00 (600 in Vamos-or)due to the primary beam.
The operators are working on it since.
The intensity of 10^7 pps came back at 8 pm.
Intensity measurement with the profiler 1.1x10^7 pps for Or-Vamos=1100 |
|
Fixed, e768s, Mon Jul 29 13:46:11 2019, Faïtrouz, Nicolas & Freddy, RUN, General, LiF, Beam intensity increased to 7e6 pps
|
|
|
Fixed, e744s, Mon Apr 15 13:28:25 2019, Nikola Faïrouz Damien Ksenia, RUN, General, CH2, Beam intensity increased to 1.8e5 pps
|
|
|
Fixed, e793s, Sat Mar 13 17:41:57 2021, Sarah Louis Wilton, RUN, General, CD2, Beam intensity increased
|
Bertrand saw that the slits were slightly closed, called the PCP and now we have around 5e5 pps
we can see the increase on the figure at 17h20 |
|
Fixed, e793s, Tue Mar 16 01:31:37 2021, Lynda, Cyril, Nishu, BEAM, General, CD2, Beam intensity increased
|
We asked for a beam intensity increase around 01h10
The slits L5 were opened and more power (~ 100 W) on primary target
Now ~ 5.6e5 pps on Cats2 |
|
Fixed, e793s, Sun Mar 14 10:01:36 2021, Juan Lois & faïrouz & Adrien, BEAM, Hardware, CD2, Beam intensity escalated up to 1.6e6 pps
|
At 9:57 the intensity increased up to 1.6e6 pps and we had to call the pcp to put it again to the normal values.
It was solved by 10:07 .
Same incidence happend at 10:17 and then again at 10h30.
The beam operators close little bit the slits to decrease the beam intensity.
The intensity is now 3.e5 pps |
|
Fixed, e768s, Wed Jul 31 14:32:53 2019, Valerian & Co, RUN, General, N/A, Beam intensity dropped
|
unstable beam since 15min... Intensity dropped from 8e6 to 1e5
Edit : Beam is back at 8 10^6 pps |
|
Fixed, e793s, Tue Mar 16 07:22:12 2021, Lynda, Cyril, Nishu, BEAM, General, CD2, Beam intensity decrease
|
The beam intensity decreased around 6h55 to less than 1e5 pps
It is due to a change of the state of the source, PCP is working to increase the intensity |
|
Fixed, e768s, Sun Jul 21 04:48:52 2019, Jenn & Franck, BEAM, General, N/A, Beam intensity check
|
OR Vamos: 1300 /s
Vamos gas profiler: 1.7x10^7 pps |
|
Fixed, e768s, Sun Jul 21 09:10:50 2019, Didier & Nicolas, BEAM, General, N/A, Beam intensity check
|
| Jenn & Franck wrote: | OR Vamos: 1300 /s
Vamos gas profiler: 1.7x10^7 pps |
OR VAMOS: ~ 1280 Hz
VAMOS gas profiler: 1.7e7 pps |
|
Fixed, e768s, Sun Jul 21 20:13:57 2019, Kseniia, Franco & Nicolas, BEAM, General, N/A, Beam intensity check
|
| Didier & Nicolas wrote: |
| Jenn & Franck wrote: | OR Vamos: 1300 /s
Vamos gas profiler: 1.7x10^7 pps |
OR VAMOS: ~ 1280 Hz
VAMOS gas profiler: 1.7e7 pps |
OR VAMOS: ~ 1700 Hz
VAMOS gas profiler: 6e6 pps
beam moved in the horizontal plane (compare last 2 pictures of beam profiler) |
|
Fixed, e768s, Tue Jul 23 09:03:07 2019, Kseniia, Gilbert, Yorick, BEAM, General, , Beam intensity and screenshots 25x
|
The beam has been pretty stable since yesterday |
|
Fixed, e768s, Mon Jul 22 19:34:16 2019, Didier & Franco, RUN, General, LiF, Beam intensity and profile check
|
|
|
Fixed, e768s, Tue Jul 23 00:01:23 2019, Freddy, Jenn, BEAM, General, LiF, Beam intensity and profile check
|
|
|
Fixed, e768s, Tue Jul 23 04:34:03 2019, Jenn & Christian, BEAM, General, , Beam intensity and profile check
|
VAMOS OR: ~1200
BEAM INTENSITY ~ 2E7 |
|
Fixed, e768s, Tue Jul 23 06:49:54 2019, Jenn & Christian & Kseniia, BEAM, General, , Beam intensity and profile check
|
VAMOS OR ~ 870
BEAM INTENSITY ~ 1.4E7 |
|