 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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Sat Apr 9 03:46:31 2022, Carsten, Accelerator, Slits in TE line
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| Changed GTEDSAH Rechts to 10mm |
Sat Apr 9 03:27:47 2022, Patrick, DAQ, Laser scanning 
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DAQ1: lxg1927:/data.local2/BeamTimeTh22/
DAQ2: lxg0155:/data.local2/E142/
LMD file name DAQ1:229Thor
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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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Fri Apr 8 23:56:07 2022, Patrick, DAQ, DAQ improvement
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As requested in ID:146 and ID:147, the laserscan tab was improved:
[LIST]
[*] The laserscan tab shows each observable plotted against the predefined wavelength setpoints now.
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Fri Apr 8 22:26:44 2022, Patrick, DAQ, Spike in all detectors
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In the previous shift, there was a spike in all detectors in the same scan step. Apparently, this was NOT a resonance since in the next step it appeared
again but at a different wavelength.
The current hypothesis is, that this is a disruption signal from one of the machines. |
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Fri Apr 8 17:57:45 2022, Konstantin, DAQ, Laser scanning
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[TABLE border="1"]
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Fri Apr 8 17:44:25 2022, Konstantin, Calibration, Final Timing
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We measured the timing for the laser bunch synchronization. A summary is given below.
[TABLE border="1"]
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Fri Apr 8 15:45:24 2022, YL, , Spectrum manipulation 5
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| See attached |
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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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Fri Apr 8 15:39:36 2022, all, Runs, first data after timing set up
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started taking data again
started at 15:40
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Fri Apr 8 14:46:02 2022, Danyal & Sebastian & Volker & Ken, Detectors, high dark countrate Cu PMT solved
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The problem - "discovered" by Volker and Ken - of the high dark countrate of the Cu PMT has been solved.
(when the Cu mirror was moved in, the dark countrate was very high ... also without ion beam)
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Fri Apr 8 14:43:50 2022, Wilfried, DAQ, laser timing - Q-switch start
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| below are my notes concerning laser timing / Q-switch start |
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Fri Apr 8 14:14:28 2022, Kristian, DAQ, Delay of bunch RF
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The bunch HF is now fed through a delay to shift the stop trigger relative to the PMT signal. The delay generator is placed directly after the CFG and before
splitting the signal for the two DAQs. The relative timing of both DAQs was not changed. |
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Fri Apr 8 14:12:57 2022, morning shift, DAQ, timing for h=1
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The timing for h=1 has been set up
The time window is now twice as large as before!
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Fri Apr 8 12:04:13 2022, Ragan, Runs, NTCAP started
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NTCAP is started for the data taking.
Carrier Frequency: 242.02 M
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Fri Apr 8 11:16:57 2022, Kristian, Laser, Wavemeter
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We changed the fiber to the wavemeter. The third fiber worked best and we could operate the WM at low exposure times, i.e., below the laser repetition rate.
We used the neutral density filter to adapt the laser power that only one laser pulse is measured by the WM each time (Exposure time =34ms)
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Fri Apr 8 11:02:04 2022, DW, YL, RSS, SL, , Change h=2 to h=1
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After changing to h=1
The frequency manipulation #5: f=242.021487MHz (124th harmonic) [no bunching]
Manipulation #7: f=242.021812 MHz [with bunching] |
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Fri Apr 8 10:44:55 2022, Ragan, Yuri, Danyal, Sergey, Runs, NTCAP stopped
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NTCAP is stopped. Sergey will now set an ion bunch instead of two in the ESR.
SC_2022-04-08_09-39-33
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Fri Apr 8 09:39:04 2022, Ragan, Runs, NTCAP started
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Carrier Frequency: 242.2 M
IQ Rate (S/s): 10 M
Reference level (dBm): -30
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