 Tue Apr 5 14:51:51 2022, Kristian, DAQ, dark counts
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We shielded the PMTs, i.e., the N2 tube, which improved the Cu PMT background rate.
Without beam and ESR lights off:
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Fri Apr 15 12:53:25 2022, Max, Danyal, Laser, checked laser pulse energy after change in wavelength range
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previous scan range:
the laser pulse energy @ 320.62 nm was ~11 mJ
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Tue Apr 5 09:45:47 2022, Danyal & Yuri, Accelerator, beam is back in the ESR - a slit was moved in
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And now also in English :)
The ion beam is back in the ESR!
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Fri Aug 6 10:23:00 2021, Rodolfo, DAQ, atplaser on r4l-41
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The user [B]atplaser[/B] is now existing on the [B]R4L-XY[/B] nodes for the ESR group.
R4 = [B]R[/B]IO[B]4[/B] Computer
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Thu Mar 10 15:20:26 2022, Jan , DAQ, analog branch signal patches to Messhütte 
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The additional signals from PMTs and XUV detector needed for spectroscopic analysis in the second DAQ are patched to AP Messhütte (MH) via the red patch
panel at the inside of the target region. The patch channels F1 to F8 (also labeled A to H in red on white) are used and extended by a cable bundle to
reach below the mirror chamber. Inside the MH the signals arrive at the red patch panel and are forwarded to the blue patch panel close to the laser DAQ |
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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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Sun Apr 10 11:11:18 2022, Kristian, Max, Laser, additional WM readout
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since the WM readout still does not work reliably, I started a python script at atppc023 that saves timestamp and wavemeter frequency. in folder wavemeter
at the desktop.
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Wed Apr 6 21:03:25 2022, Ken Ueberholz , Detectors, Xuv-Detektor, further information
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Some further information regarding the
xuv-detector and its components. |
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Sun Apr 3 00:41:45 2022, Ken Ueberholz , , Xuv-Detektor Signale
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The Xuv-detector cabel channels seem to be
wrongly labeled in the Messhütte (see
picture) and are propably also wrongly
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Sun Apr 3 15:34:34 2022, Ken Ueberholz , , Xuv-Detektor CFD-treshhold
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I co controlled all detector signals and
adjusted the threshold to be just above
the noise. I will double check this when
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Fri Mar 25 06:22:15 135, Ken Ueberholz, Detectors, XUV-Detector Rates
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Count rates were measured for the XUV-
detector for a full circle:
Cathode: -5V, shields: 0V, main coil 8A,
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Thu Apr 7 05:55:17 2022, Ken Ueberholz, Detectors, XUV-Detector Mesytec crash
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When the XUV-detector has to shut down unexpectedly, it can happen that the Mesytek power supply crashes and can't be
communicated with. If this happens the Mesytec PS needs to be restarted from hand inside of the ESR. This can be done by
restarting the crate located at the bottom of the XUV-detector.
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Thu Apr 14 12:38:38 2022, Sebastian, Detectors, XUV / Cu checkups
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Check regularly if the connection to the XUV and Cu detectors are still active and the detectors move in (after injection) and out (after killing the ion
beam).
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Sun Apr 10 13:17:53 2022, Kristian, Max, DAQ, Wavemeter readout
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We changed the Labview code in order to reduce the amount of data that was overfilling the WM data queue. We removed the temperature and intensity values
and added an additional 250ms wait.
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Sun Apr 10 06:34:49 2022, Kristian, Max, DAQ, Wavemeter Readout
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Problem solved. Ignore this entry
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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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Sat Apr 9 05:26:25 2022, Patrick, Laser, Wavemeter
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| The wavemeter still shows large spikes from time to time. The exposure time is still at 34ms. |
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Mon Jul 26 17:58:52 2021, Rodolfo, Laser, Water Filters
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| The water filters (deioninzing and particle) have been replaced. |
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Tue Apr 12 17:01:30 2022, Konstantin, Detectors, Voltage PMT North
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| Voltage of PMT North has been increased from 2500 V to 2600 V. Additionally the threshold was adapted from 25 mV to 12 mV. |
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Fri Mar 18 09:18:38 2022, Rodolfo, Accelerator, Vacuum leak, ODR
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After the beaking out process we got a vacuum leak in one of the MgF2 windows (Referenz: PMT South) of the optical detection region (ODR) Stand 17.03.2022.
In order to avoid breaking the vacuum again and a second beaking out process we had to spread vacuum seal on the window.
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