 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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Tue Mar 29 21:37:13 2022, Rodolfo, Laser, Pump Laser
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The gold "reflectors and end plates" of our pump laser (Quanta-Ray PRO) have been exchanged by new ones.
- Output power after Oscillator and Amplifier (@ 1064 nm): 41 W.
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Thu Apr 7 10:10:31 2022, Ragan, Yuri, Danyal, Accelerator, Problem in UNILAC
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| The power supply of the UNILAC magnet is broken. The repair will take up to 6-7 hours. |
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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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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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Fri Apr 1 18:30:38 2022, Carsten, Detectors, Positions / Voltages threshlds for particle detectors
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[B]DC beam 238U92+ (205kV, e-beam)[/B]
We used the detector NA_SZ to determine the central primary-beam (238U92+) position by observing the Schottky-signal while moving the detector inside.
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Thu Mar 31 17:56:32 2022, Konstantin, DAQ, Photodiode test signal
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We used a signal generator to provide a 4MHz dummy-RF signal. This was divided by a factor of 2 for laser-"bunch" synchronization and by a factor of 200
for to provide the stop-tigger attached to the DAQ. With this Dummy-RF we were able to measure the relative arrival times of the laser at the photodiodes
located in the laser towers. Note that the signal of the southern photodiode arrives first. This is because the scale of the time axis is given in (10/3ns)-bins |
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Fri Mar 25 14:31:24 2022, Rodolfo, Laser, Photodiode signal SO in the Messhütte
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Measured at the Panel "Messhütte - Laserhütte", BNC "Fast PD / SO".
- Average over 256 samples |
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Thu Mar 24 16:59:35 2022, Rodolfo, Laser, Photodiode signal SO
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Fast Photodiode signal at the "SO-Bogen" (South-east arc).
- Average made over 250 samples.
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Sat Apr 2 18:17:31 2022, Yuri, Accelerator, Photo-Identification
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| Just a photo of the ID |
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Tue Mar 29 12:47:26 2022, Ken Ueberholz, , Parameter setting for XUV and copper mirror detector
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Some Default Settings for the XUV
Detector. The copper
mirror should always move fully in.
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Fri Apr 1 23:47:45 2022, Carsten, Detectors, PMT thresholds / PMT north does not allow voltage abow ~ -1kV
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Checked thresholds of PMT with beam and without beam.
The [B]PMT "south"[/B] which is now at the gas-jet target has burst-like pulses with a train of many short pulses of duration of about 1us. The signals |
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Tue Apr 5 11:14:52 2022, Sebastian, Kristian, Pierre-Michel, DAQ, PMT over wavelength histogram v2
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Today we finalized the PMT over wavelength histogram in:
Analysis/Histograms/Step2_Anl/LabView/laserscan
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Mon Apr 4 15:27:31 2022, Sebastian, DAQ, PMT over wavelength histogram
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Kristian and I tried to create a "PMT over wavelength" histogram under step2Anl/LabView.
Unfortunately, the code ist still in progress and does not work yet.
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Wed Mar 23 11:20:55 2022, Simon, Detectors, PMT operating voltages
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During the testing of the PMTs the following operating voltages were applied:
PMT Cu: -1300V
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Fri Apr 1 22:01:14 2022, Konstantin, Detectors, PMT operating voltages
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> During the testing of the PMTs the following operating voltages were applied:
>
> PMT Cu: -1300V
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Tue Apr 12 14:52:19 2022, Rodolfo, Detectors, PMT Nord, Middle. Datasheets
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Attached are the datasheets for the solar-blind PMTs.
- PMT Nord. Type 9423. SN: 650
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Tue Apr 5 13:24:40 2022, Kristian, Detectors, PMT Cu
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| HV cable was in wrong channel in power supply. Now it is back to the correct position. Checked connection at the PMT. |
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Sat Apr 9 19:09:57 2022, Rodolfo, Laser, Optimization - Resonator of dye laser
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I have tuned a bit the resonator of the dye laser.
The total output energy after the main amplifier is 86 mJ (@ 645,6 nm)
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