Some notes on tasks to tackle before sending the full power beam into the tunnel.

Also some ideas on first tests for when we ramp up the laser.

Before full power operation

Check permanent and variable filtering (flippies) for cameras in laser room – Camera Alignment References
Check permanent and variable filtering (flippies) for cameras in tunnel – Camera Alignment References
Determine safe set of motor positions for everything in the PB – Reference Motor Positions
Write up procedure/check list
Find an reliable energy controlling method:
1. Use wave plate + thin film polarizatior. This will have to test the minimum achievable energy using such combination (ideally <10mJ), and test the damage threshold of the polarizor http://physics-elog.slac.stanford.edu/facetelog/show.jsp?dir=/2022/13/28.03&pos=2022-03-28T15:58:17
2. Measure change in collimation as function of pump delay (SAGA attenuation, WP+thin film polariser?)? – or come up with strategy to enable slow ramp up of energy without RP attenuator http://physics-elog.slac.stanford.edu/facetelog/show.jsp?dir=/2022/13/30.03&pos=2022-03-30T10:04:08
Figure out how to send beam at lower repetition rate – Brendan suggested pulse slicer
Fix the panels for laser shutter - a high power beam with diffraction profile may cause some hazard to the gratings – installed http://physics-elog.slac.stanford.edu/facetelog/show.jsp?dir=/2022/14/05.04&pos=2022-04-05T17:30:07
Check with Spencer on how to use the DAQ for laser-only operation, e.g. to save CompNear/Far, PBNear/Far and probe cameras simultaneously, scan waveplate etc.

During ramp up

Attenuate laser and gradually ramp up
Check light levels on all cameras, look out for abnormalities that indicate damage
Check vacuum levels as beam is dumped on compressor block
Check vacuum levels as beam is dumped on laser beam dump in PB
Check for damage, signs of ablation etc. around compressor block and laser beam dump in PB
Check if scaling on laser diagnostics matches expected energy scaling (for on-shot energy measurement)