 Tue May 10 21:41:17 2022, Rodolfo, Accelerator, T-Scraper
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| The T-Scrapers at the electron cooler have an issue. They can't be moved in the horizontal direction using the DeviceControl. |
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Tue May 10 23:53:42 2022, Rodolfo, General, shift change
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| The night shift took over. They are trying now to overlap the ion and laser beams. |
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Wed May 11 14:59:01 2022, Rodolfo, Laser, Laser status
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I have measured the output energy of the laser system. All values in [mJ] and over 500 laser-pulses average
[TABLE border="1"]
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Mon May 16 15:57:37 2022, Rodolfo, Laser, Wavemeter calibration 
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I have calibrated our Wavemeter WS7 using the temperature stabilized He-Ne Laser (SIOS EN60 825-1:2014). In the screenshots below you can see the readout
of the wavemeter before (vor) and after (nach) calibration. |
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Fri May 27 14:57:23 2022, Rodolfo, Laser, Laser Energy
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I have started up the laser system (Q-Ray & Cobra) again. Here some parameters*:
- Q-Ray's output energy (@532 nm: 547 mJ.
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Wed Jun 1 17:20:04 2022, Rodolfo, Laser, HeNe @ WS7
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Fri Jan 13 17:05:22 2023, Rodolfo, Laser, Testing WS6
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| Testing the new Wavemeter (HighFinesse, WS6, SN3950) with the QRAY laser light @ 532 nm. Multimode fiber von High Finesse:FC/PC S (Corning, MM, OM2) |
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Wed Jan 18 13:02:12 2023, Rodolfo, Laser, Testing WS6 with Cobra
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Testing the WS6 (S.N. 3950) together with the Cobra.
Cobra operated with dye DCM in Ethanol + DMSO (Concentration 1:1)
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Tue Jun 6 09:33:00 2023, Rodolfo, Laser, Fiber coupler
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| Cobra's new fiber-coupling unit for wavelength reading. |
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Thu May 12 10:21:30 2022, Ragan, Shahab, Simon, Sebastian, Christopher, Wilfried, General, No Beam
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| There is no beam in the ESR due to some problem in the UNILAC. |
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Thu May 12 11:30:18 2022, Ragan, Shahab, Simon, Sebastian, Christopher, Wilfried, General, Beam is back
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| Beam is back in the ESR. |
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Thu May 12 12:02:56 2022, Ragan, Shahab, Simon, Sebastian, Christopher, Wilfried, General, No beam
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| There is no beam in the ESR again. |
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Thu May 12 12:51:30 2022, Ragan, Shahab, Simon, Sebastian, Christopher, Wilfried, General, Beam is back
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12:50 Beam is back again in the ring.
12:52-until now Kicker problem in the ESR. |
 Mon May 16 14:20:05 2022, Ragan, Danyal, Carsten, Phillip, Wilfried et al., General, E128 Beamtime
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> Dear all,
>
> unfortunately, the E128 experiment must now come to an early end.
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Tue May 10 20:35:42 2022, Phillip, Wilfried, Max, Detectors, PMT Threshold
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Since we have ions in the ring now, we looked at the PMT thresholds and the widths. In order to do so we looked at the Raw Signal directly before the CFD
and its output simultaneously. You can now set the threshold just above the noise. If the threshold is too low you will also see flat lines in the oscilloscope
when triggered on the CFD output. New values:
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Wed May 11 22:04:30 2022, Phillip, Wilfried, Max, General, spacial laser - ion overlap verified
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After the SIS/ESR optimization we checked the spatial overlap with the T-scrapers again.
The values are:
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Thu May 12 00:16:13 2022, Patrick, Volker, Guy, Rui-Jiu, Runs, Runs night shift
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[TABLE border="1"]
Time | SIS-intensity | ESR-intensity after orbit change| cooler-HV | LMD-DAQ2 file nr | LMD-DAQ1 file nr | scan range(nm) | step width increment (nm) | |
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Wed May 11 03:17:14 2022, Patrick, Volker, Guy , Runs, Start laser scanning
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Runs of the night shift. The wavelength range is 601.95 - 601.735 nm.
We started the wavemeter python script on atppc023 located in Desktop/wavemeter_Bi.
We changed the wavelength range in go4 to the actual scan range.
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Wed May 11 03:10:55 2022, Patrick, Sebastian, Volker, Guy , Laser, Laser - bunch timing
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We added the delay and gate generator in between the bunch trigger and the CFD to move the timing of the PMT middle signal relative to the photodiodes north
and south.
The center value of PD-North is at 19 bins, PD-South at 55 bins, the middle is therefore at 37 bins. The PMT peak should be half a revolution, ie 75 bins |
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Wed May 11 01:09:07 2022, Patrick, Sebastian, Volker, Guy, Laser, Beam overlap
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We overlapped the laser with the ion beam.
The ion beam positions are:
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