The HeNe was running over night and the measured laser frequency of the wavemeter was logged, see picture.
A significant drift of around 300 MHz is visible during the night.
It is possible, that the laser lab got too cold during the night, as the pulsed laser was not running.
For now, we put the wavemeter in a thermoinsulator box...

If the laser controller is locked up again, the little display will show an error message after an attempted medusa scan.
To restart it, follow these steps:
1.) Unlock the beam stabilization.
2.) shut down medusa and the wavemeter software
3.) Turn off the 2 laser stages
4.) Close the shutter of the pumping laser
5.) Turn off and on the power button of the pulsed laser inside of the black box of the pump laser insertion.

To start again go back through the list.

We changed the dye at ~3pm.

After some fine adjustements of the laser we had to change the MRC settings, because the laser position changed.
Therefore we checked the position of the laser with the T-Scrapers with the settings from post 49 "First Scraper Scan".

New settings of MRC and screen pic is attached.
The position of the laser on the screen is now the 'same' as yesterday (see attachement).

Thanks Jan!

• Controlled automatically by the control system (sub chain patterns)
  
• Set to manual operation during setup or experiment.
  

yesterday (05.06.2024), firstly, the two ion pumps (underneath the fluorescence chamber) were switched off by the vacuum group (Björn Mai, Tel: 3438). Secondly, the two pressure gauges (located near the target) were switched off.  The pressure gauge at the fluo chamber is called E02VM3x and the pressure was 5.5e-11 mbar.  The other gauge is called IG2 and located further south, it measured 3.7e-11 mbar.  That was when ion pumps were still switched on.  Since ~10:45 (05.06.2024), the two ion pumps and the two ion gauges are switched off. There was no measurable change in the pressure after switching off the ion pumps.

Maximum XUV LED Voltage: 6.5V

1.) If not already opened, open the Medusa Laser Control software, see picture:
2.) In the "view" submenu, choose "proteus status".
3.) At the bottom of the list, the K250 shows the scaled voltage.