 Wed Apr 6 22:29:55 2022, Patrick, Accelerator, ECooler voltages
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ECooler voltages:
[B]06.04:[/B]
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Thu Apr 7 08:43:19 2022, Danyal, Yuri, Ragan, Accelerator, again no injection in ESR - ESR kicker problem
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we had no injections in the ESR again
it turned out that the injection kicker of the ESR has a problem |
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Thu Apr 7 09:58:55 2022, Ragan, Yuri, Danyal, Accelerator, Kicker problem solved
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| The kicker problem is solved and the beam is back in the ESR. |
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Thu Apr 7 10:10:31 2022, Ragan, Yuri, Danyal, Accelerator, Problem in UNILAC
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| The power supply of the UNILAC magnet is broken. The repair will take up to 6-7 hours. |
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Fri Apr 8 09:13:38 2022, Ragan, Danyal, Accelerator, No beam
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Cathode is being changed at the ion source. So no beam for the moment.
Sergey has been contacted to change from two ion bunches to a single ion bunch in the ESR. |
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Fri Apr 8 15:42:20 2022, Yuri, Accelerator, Slits in the TE line
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At around 15:00, The slits in the TE line were changed to :
TE4DS5HL -12 mm -> -20 mm
TE5DSAH 0 mm -> +15 mm |
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Sat Apr 9 02:55:38 2022, Carsten, Accelerator, Kühlerausfall und Gründe dazu
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Wir hatten heute Abend eine Kühlerausfall, der uns mehrere Stunden beschäftigt hat, weil gem. Anzeige in Device Control kein Netzteil mit „rot“ angezeigt/ausgefallen
war (siehe unten).
Nach Rufbereitschaft Serge, dann Regina sowie Controls konnte zunächst gefunden werden, dass das Netzteil einer Clearingelektrode (GECEKD2D) keinen korrekten |
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Sat Apr 9 03:46:31 2022, Carsten, Accelerator, Slits in TE line
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| Changed GTEDSAH Rechts to 10mm |
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Sat Apr 9 03:57:10 2022, Carsten, Accelerator, New Cooler voltage after the crash of the cooler
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After the restart of the cooler the Ohmlabs divider showed a voltage 16V lower than before. This could also be seen as a slight shift in the Schottky lines
w.r.t to the bunching frequency and the marker. Corrected
the voltages at injection to DeltaU +3963V and in Sc 5/7 to + 3943V. Now perfect match with the old Schottky frequency.
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Sun Apr 10 15:29:37 2022, Carsten,Sarper, Accelerator, Ecooler failed
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Ecooler failed @15:23 Carsten is fixing it
Fixed @16:00 |
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Mon Apr 11 07:54:37 2022, Danyal, Alexandre, Kristian, Sebastian, Accelerator, Jump in E-cooler voltage
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We saw a jump in the E-cooler voltage at about 7:50.
jump from 209619 to 209610 V
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Mon Apr 11 10:17:01 2022, Danyal, Accelerator, Interlock - reset
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10:17
Wie heutemorgen in der Sitzung (morning briefing) vereinbart,
führt Herr Florenkowski einen Interlock und danach einen Reset von E02MK durch.
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Mon Apr 11 12:50:22 2022, Kristian, Accelerator, Th lifetime 
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We used the counter to measure the lifetime. During the 30 min scan time dropped only slowly.
During a longer break, e.g., when the laser flash lamps are changed, one could take data over a longer time. |
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Tue Apr 12 12:41:20 2022, Alexandre, Sebastian, Accelerator, no beam in SIS18
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Thu Apr 14 06:29:18 2022, Max, Sebastian, Accelerator, lesser ESR injection intensity
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We now have less ESR injection intensity (see screenshot attached).
This can also be seen in the count rate after "UNILAC/SIS failures".
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Thu Apr 14 08:41:42 2022, Carsten, Accelerator, Low intensity at the experiment after series of failures during the night
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After the recovery from the failures during the night, we see much lower intensity at the experiment (measured with the particle detector count rate).
Instead of 8000-10000 cts we see only 3000-4000cts at comparable SIS intensities.
Also ESR cooler seems to be slightly unstable (wiggling lines) during injection. However, it is visually evident from the Schottky that the injected intensity |
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Thu Apr 14 10:57:11 2022, Carsten, Accelerator, Maintanence UNILAC / Op training
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We had no beam since about 1000. Also, we are still trying to find out why we have such a low intensity in the expereimnt.
Presently, there is a planned maintenance in the UNILAC, beam is expected back in 25-30 mins.
The profile grid TE3 in the transfer beamline in front of the target will be used to check if the extracted SIS beam has changed compared to before the |
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Tue Mar 29 12:47:26 2022, Ken Ueberholz, , Parameter setting for XUV and copper mirror detector
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Some Default Settings for the XUV
Detector. The copper
mirror should always move fully in.
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Fri Apr 1 00:27:27 2022, Carsten, , Settings Particle Detectors /Tests with primary beam
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All the beam settings will be given in a separate post.
We have 238U92+ centered in the ring with typically a few times 10⁷ ions.
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Fri Apr 1 02:29:40 2022, Carsten, , ESR Cooler crashed
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| ESR cooler crashed. We could not restart the cooler. Since we had several other problems, we stop now. |