 Wed Jun 1 08:39:50 2022, Kristian, Konstantin, Calibration, Wavemeter reading
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We recorded files with high wavemeter readout rate and saved it at the atplaser network drive (Q:) - Bismuth - wavemeter folder.
Could be used to calibrate the laser steps. The MBS readout rate is 4 Hz, here 30 Hz, so there are a few more values. |
Wed Jun 1 17:20:04 2022, Rodolfo, Laser, HeNe @ WS7 
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Fri Jun 3 12:01:17 2022, Danyal, Detectors, switched off XUV detector on 1 June ~17:00
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I have switched off the XUV detector on 1 June at about 17:00.
The high voltages of the MCP (in ESR laser lab) were turned off and inside the ESR cave the power supplies (coils and cathode) and the crate were turned off.
Also the new "control box" for the detector was switched off.
And I checked (visually) that the XUV detector (and the Cu detector too) were indeed "moved out".
Danyal |
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Thu Jun 30 11:12:21 2022, Carsten, Analysis, Updated Go4 Analysis with small Bugfix (PMTOverWavelength SPectra)
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Here attached is a more recentversion of the Go4 Analysis Code with some smaller bugfixes.
For adaequate *.C files please have alook in 208Bi go4 directory on the atplaser account.
Please note, that there is also a (not fully up-to-date) description/manual somewhere here in the Elog. |
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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)
- Oscillator concentration 0.3 g/l.
- Main amplifier concentration 0.0375 g/l (1/8 oscillator concentration).
- Laser linewidth: 6 GHz. Expansion factor: 10x. Grating: 2400 g/mm (40/2013)
Seed energy: 504 mJ @ 532 nm.
Cobra output energy: 112 mJ @ 640 nm.
Scan settings: 640.0 nm - 639.8 nm @ 0.005 nm / step.
Wavemeter settings: Pulsed (ext. trigg. 1 = QRay-Output: Lamp Sync). Precision: Fine.
- Wavemeter calibration. Reference source: Neon lamp.
- LTA-Data under ATPPC023 D:\WLM6 LTA data\D:\WLM6 (18.01.2023, 11.23, 640,10656 nm.lta) |
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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. |