 Mon Jul 26 17:15:47 2021, Rodolfo, Laser, Quanta Ray - Water leak 
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| On Thursday afternoon (22.07.2021) a water connector has broken and water has been spilled in the laser head. |
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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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Wed Jul 28 13:31:22 2021, Rodolfo, General, Air filters
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| Filters (Hepa-) inside the flow boxes have been replaced. |
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Mon Aug 2 10:54:44 2021, Rodolfo, Laser, Quanta Ray - Water leak in the power supply
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After fixing the broken water connector in the laser head a new water leak appeared in the Quanta-Ray power supply.
We found the leak in the water pump flow line (arrow up). We took the water connectors appart, rebuilt the teflon seeling and put the water connectors |
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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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Fri Aug 6 10:40:54 2021, Rodolfo, DAQ, mbs in atplaser
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The "MBS program" (data acquisition) is now located within atplaser@r4l-41, in the folder "th21":
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Wed Sep 8 21:44:55 2021, Rodolfo, General, Preparation
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[TABLE border="1"]
[B]Status[/B]|[B]Arbeitspaket[/B]|[COLOR=chocolate][B]Kommentare[/B][/COLOR]
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Thu Oct 14 10:21:46 2021, Rodolfo, Detectors, Dismounting Cu-Mirror
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| We have dismounted the parabolic Cu-Mirror at ESR on 13.10.2021 |
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Fri Nov 5 17:23:23 2021, Rodolfo, DAQ, Dye trigger out
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The dye laser offers different scan settings (see pages 65 - 67 of the user manual). We are using the following setting, see attached screenshot, to produce
the status "laser busy" for the DAQ.
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Fri Nov 19 15:50:44 2021, Rodolfo, Accelerator, Laser windows at E-Cooler side
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New laser viewports have been installed at the E-Cooler side of the ESR.
[IMG]elog:10/1[/IMG]
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Thu Mar 3 13:50:45 2022, Rodolfo, Laser, Dye cell cracket
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The "20 mm" dye cell used for the Oscillator and Pramplifier got damage. I supposed it was produced by the pump beam hitting on a very "old" dye solution
(DCM / Ethanol, concentration 0,3 g/l). The solution in the dye reservoir was more 12 months old. |
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Thu Mar 3 17:21:26 2022, Rodolfo, Detectors, MgF2 Windows
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New reentrance viewports made of MgF2 have been installed at the ESR "Optical Detection Region". In the middle the old window (also MgF2) was kept into
place. |
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Thu Mar 3 17:34:42 2022, Rodolfo, Laser, Pump Laser
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We have issues with our Pump Laser (Spectra Physics - Quanta Ray Pro). After the service made on mid Dezember (2021) the laser does not get started. After
contacting the service many times, the technicians think it can be an issue with the flashlamps.
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Thu Mar 3 21:39:21 2022, Rodolfo, Laser, Dye solution, DCM in Ethanol and DMSO
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I have prepared a new dye solution of DCM in Ethanol and DMSO (1:1). The concentration of the "oscillator + preamplifier" is 0,3 g/l. The concentration
of the "main amplifier" is 0,0375 g/l or "1/8" the concentration of the "oscillator".
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Thu Mar 17 17:37:49 2022, Rodolfo, Accelerator, High voltage dividers for E-Cooler
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Two dividers, from PTB-Braunschweig, have been deliver today. We will use them to monitor the electron-cooler voltage in situ.
- PT120 (up to -120 kV) with scaling factor: 12003.341, and
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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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Fri Mar 18 16:58:26 2022, Rodolfo, Accelerator, Pressure at North-East Arc
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The pressure at the north-east arc of ESR, where the laser window is located, looks suspicious. The sensor E01LF02 shows a value of 7.26E-8 mbar. For comparison
I have also upload a photo taken on 07.02.2022 where the pressure was 4.62E-10. We have contacted the vacuum expert and asked for his opinion. Waiting
for the reply ...
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 Mon Mar 21 09:18:28 2022, Rodolfo, Accelerator, Pressure at North-East Arc
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Our vacuum expert has reply. The "IZ Pump" in this region was off.
[quote]The pressure at the north-east arc of ESR, where the laser window is located, looks suspicious. The sensor E01LF02 shows a value of 7.26E-8 mbar. |
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Mon Mar 21 10:46:18 2022, Rodolfo, DAQ, TDC & Scaler description channels
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For the First Vuprom we have the following channel configuration (Stand:21.03.2021).
Please note 1.
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Thu Mar 24 13:27:47 2022, Rodolfo, DAQ, Disk space - LXG1297
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In our Linux computer (LXG1297: Laser spectroscopy) we have a Drive with 1.8 TB total disk space. 300 GB are at the moment in use, but I can clean this.
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