 Wed May 12 22:28:55 2021, Ken Ueberholz, General, Bunching succesfull
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| Bunching with 2 and 10 bunches succesfull |
Wed May 12 19:48:24 2021, Sebastian, General, DSG821 Network 
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To implement the bunch Signal Generator (DSG821 inside ESR) you have to:
1. unplug the Ethernet cable
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Wed May 12 18:59:15 2021, Ken Ueberholz, General, Power is back
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| Power is back and most things are running again |
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Wed May 12 15:36:04 2021, Danyal, Accelerator, general power failure in ESR! (everything is off)
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The power in the ESR is off.
(also on the gas-target area on top of ESR)
Electrical engineers are trying to find and fix the problem. |
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Wed May 12 13:11:58 2021, Danyal, Accelerator, short break between 13:30 and 15:30
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There will be a short break (2 hours) this afternoon. Between 13:30 and 15:30.
The so-calles "super lense" in the UNILAC needs to be cleaned (rinsed).
After that operation should continue as usual. |
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Wed May 12 10:15:47 2021, Volker Hannen, DAQ, Unplugged TDC inputs for MCP front and back
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To reduce the load on the VUPROM TDC, we unplugged the TDC inputs for the front and back signals of the MCP of the XUV detector.
The Anode signal is still plugged in and should be sufficient for the analysis. |
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Wed May 12 10:14:18 2021, Lars, Accelerator, E-Cooler
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M.Steck et al. discussed about the E-Cooler and found a possible issue. They asked for enterance to the ESR. Since nobody else was in the HKR and anyway
nothing was running because of some other issues, I told, the experiment would not be disturbed and they could enter and do things. (Sth. like putting
some repeller electrodes onto hand and other magical things).
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Wed May 12 09:59:08 2021, Benedikt, General, Rigol DSG821 signal generator settings
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Wed May 12 09:09:15 2021, Sebastian, DAQ, Fluorescence
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fluorescence with detector in parking position
fixed laser wavelength
electron cooling ON,
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Wed May 12 09:05:48 2021, Keysight Settings, DAQ,
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Wed May 12 09:04:48 2021, Sebastian, DAQ, Keysight AUtoCal
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Wed May 12 08:42:49 2021, Sebastian, Analysis, Laser scans / coastig beam / no ecooler
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| Attached you'll see a first laser scan of ~100GHz in the UV. |
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Wed May 12 08:41:36 2021, Sebastian, Analysis, Laser stability
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| During night shift the laser was very stable! Only minor fluctuations occured in the UV |
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Wed May 12 08:32:04 2021, Sebastian, Analysis, fluorescence & energetic overlap
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During the night shift we saw several rises of the fluorescence (see another entry) and also energetic overlap in coasting beam modus.
Here the laser wavelength was stabilized @ 1028,967nm and electron cooler was switched off because of some fluctuations which we saw in the schottky.
Left part of the schottky picture shows the c3+ beam, the right part is the o4+ contamination. |
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Wed May 12 02:34:29 2021, Danyal, General, instabilities in ion frequency
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The ion beam moves around, pretty arbitrary. See picture.
ESR crew believes that it is not due to fluctuations in the HV of the E-Cooler. |
 Wed May 12 08:10:17 2021, Lars, General, instabilities in ion frequency
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looks like the E-Cooler is responsible for this. If one turns off the electron current, the beam stays stable.
M.Steck is informed.
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Wed May 12 02:16:25 2021, Danyal, Lars, Accelerator, Ion beam position
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Laser Position with scrapers verified.
1HA: impossible to scratch laser beam, still there at -1.0 mm
2HA: +3mm --> half the laser power on detector; +4.5mm --> gone |
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Tue May 11 20:14:43 2021, Danyal, General, bad ESR vacuum
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I just heard that the ESR vacuum is quite bad.
There was a small vacuum problem a while ago, it was sealed, but apparently the pressure is not as low as usual.
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Tue May 11 18:29:35 2021, Danyal, General, first ions in the ESR
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Tue May 11 16:33:31 2021, Ken Ueberholz, Detectors, Detector control manual
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| Attached to this elog entry is a short manual for the xuv-detector control. If anything is missing or not understandable I can change anything. |
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Tue May 11 16:07:59 2021, Sebastian, DAQ, DAQ Manual
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| Attached you'll find a short manual for operating the whole DAQ system |