Some notes on aligning the laser through the beam transport.
Update Nov 2021: Most of the alignment is now indeed automated and can be controlled using Claudio's GUI, but camera issues still require manual alignment every now and then.
References can be found here and are hard-coded into the auto-aligner: Laser alignment references
HeNe: Automated alignment procedure (GUI)
Go to facet home → Matlab GUIs → S20 Laser Tools → S20 Laser Auto Alignment
The GUI looks like this:
Press 'Stop Alignment' (red button). This will stop any scripts running on other machines.
Then tick boxes for the references/mirrors to align and click 'Grab References', and 'Start Alignment'.
Claudio recommends to take a few minutes to set a suitable ROI and to grab a background before starting the procedure and to do one at a time at the beginning to speed things up.
Every time a new ROI has been selected, one has to grab new references.
HeNe: Manual alignment procedure
- Find reference in the laser alignment reference tab
Note the coordinates are for NEGATIVE, NEGATIVE which indicates the direction of the axes.
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IR: Manual alignment procedure
Now after aligning the HeNe, we can proceed with using the IR laser and overlapping its beam path with the HeNe.
- Check references on DMNear and Far
- Block HeNe in laser room (this is now motorised):
The motor can be found at facet home → Laser → LI20 → Infrastructure → Controllers (mid column): XPS MOC-LA20-LS24 → Ch3
IN is at 10, OUT is at 8. (Did IN mean block in, so no HeNe?)
- Close Iris near the DM to 'Align' (will be motorised soon)
- Now someone has to bring on the laser in the tunnel
- Open shutter on Laser → LI20→ Laser and then the shutter next to LSS EPS EPICS from High to Low
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