We (Max, Kristian, Danyal, me) fixed the "external trigger" problem.

1.) The delay between lamp sync and Q-switch trigger was too long. The delay must be 200µs (3rd picture)! 

2.) The settings from the left Dual Timer (upper and lower part) in the ESR Laser Lab (above QuantaRay laser) were wrong and are now adjusted. Settings are depicted in the attached photos (1st and 2nd pic).

4th picture shows the pulse train of the pump laser.

channel 0: linux time (epoch time)
channel 1: ms timer
channel 2: E-Cooler Voltage(Ohmlabs)
channel 3: Cobra Set Wavelength
channel 4: WS7 wavelength
channel 5: WS7 frequency
channel 6: WS7 status
channel 7: Status keysight (?)
channel 8: WS7 pressure (?)
channel 9: CobraMotorPosUpperPart
channel 10: CobraMotorPosLowerPart
channel 11: CobraNumberOfLoop
channel 12: StatusCobra
channel 13: WS7 temperature (?)
channel 14: CobraFromWavelength (higher wavelength)
channel 15: CobraToWavelength (lower wavelength) 
channel 16: CobraIncrement
channel 17: CobraStepNr
channel 18: status?
channel 19: PTB divider (not connected to cooler)
channel 20: ?



 

The UV-LED of Münster was connected over 
channel 8 to the Messhütte. 6V are 
supplied by the power supply (picture 2). 
The Led is located at the xuv detector 
(picture 1).

The kicker problem is solved and the beam is back in the ESR.

We saw a jump in the E-cooler voltage at about 7:50. 
jump from 209619 to 209610 V 

At 7:56 it jumped back to 209619 V
seems stable now  

10:17 
Wie heutemorgen in der Sitzung (morning briefing) vereinbart, 
führt Herr Florenkowski einen Interlock und danach einen Reset von E02MK durch. 
Das dauert nur ca. 15 min. 

nach dem interlock wurde der ESR "rot" 

Um 10:21 war das problem gelöst und der ESR war wieder "blau"

Attached are the instructions to start and stop data taking using the NTCAP.

1. If the laser stabilization is still running, turn both stages off and block the main amplifier.
   
2. Ensure that the laser spot is centered on the paper screen, which is located in top of the laser tower in the south (ATTENTION: please only use the preamplifier and not the main amplifier!!! If you're unsure what you are doing please contact Rodolfo or Konstantin).
   
   
3. If this is not the case and the beam is completely off, have a look at the MRC Stabilization system. If it is running, close the software and turn the hardware off and on again. The spot will leave its position and come back after the stabilization is turned on again.
   
4. If it is still not centered, use and only use the piezo mirror (the one with red screws) to bring back the spot.
   
   
5. Remove the paper screen and then turn on the main amplifier.
   
   
6. Restart the software and put in the values from the file 07-04-2022(...).png. Start the two stabilization stages in the software. The laser spot should move back to the correct position.
   

(MBS server should be running at the LXG1297 machine. If not you will get an error message. Then start the server - last command in console)

Just enter the following commands in the console of any PC

ssh atplaser@r4l-41
    ThE142_2022
resl
cd mbsrun/th22
mbs
@startup
connect rfio lxg1297 -disk
open file lxg1297:/data.local2/BeamTimeTh22/229Thor -auto -rfio
sta ac




To stop MBS enter the following commands

sto ac
close file
disconnect rfio
@shutdown
exit
resl