Current status: 
Laser busy signal works correctly (5V if the grating moves, 0V if not) if the laser is operated by the Sirah software.

When the laser is controled by the "Thorium Main VI" the laser busy signal is always 0V.

We coupled the laser through a multi-mode fiber into the wavemeter.
With the main amplifier enabled, we got enough power behind the fiber (0.5 - 1.5 mW) to use the wavemeter with 34 ms exposure time (1s / 30Hz to prevent jumps in the wavemeter readout).

Pictures below: 
1: First test scan with 34ms exp. time.
2: Comp. too large laser power (2. scan duoblet) vs. attenuated power (right scan doublet). The latter has less hickups.
3: Laser scan with attenuated power in go4.

The measured frequencies in the first scan step are unstable in any case.

Spikes (rather "second wavelength the laser is regulrarly jumping to") can be removed by adjusting the fiber coupling with the mirrors (change of interference pattern) or the L/2-waveplate (change of coupled power).
However, during (and after) the scan the spikes seem to reappear.

The lower limit (to position) of the Cobra control VI has to be one increment smaller.
This means for moving from 601,95 to 601,74 the "to position" has to be 601.735.

We also checked the displayed HV values in Go4 with the shown values of the HV VI.

Both values in go4 and in the VI show the same value and are changing "simultaneously" (depending on the refresh time of go4 and Labview).

It is now possible to stabilize and move the laser with both stages.

The software and hardware settings are attached.
For synchronizing with the laser pulse we use following frequency generator settings:
period: 200us
high: 5V
low: 0V
duty: 50% 

The frequency generator is triggered with the external Q-switch trigger signal, that is in coincidence with the ESR HF.
To use the stabilization one has to use the external and NOT the q-switch mode of the laser. 

We overlapped the laser and ion bunch in the time domain. The delay has to be set on the module above the laser and NOT in the ESR Messhütte!

The values are:

PD NO: 63
PD SO: 98.5
Ion bunch: 150 

• In between a measurement the scrapers stopped working in the device control. Therefore, we had to go into the electronics room.
  
• Position to scratch charge transferred beam: S1HA at -35.
  
• Beam diameter is roughly 6-7 mm (horizontally) and 4 mm vertically (as opposed to 1-2 mm).
  
• The charge transferred ion beam seems to shift the position of the main beam over time (1cm / 2h) as the main beam "transfers its intensity".
  

The final timings are (in bins +-1):

PD NO: 103
PD SO: 138
PMT middle: 44
e-cooler = (PD NO + PD SO) / 2: 121
e-cooler - PMT middle: 77
roundtrip / 2: 75
roundtrip / 2 + 10ns: 78

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)