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- Set the laser powers to approximately 10 - 30% of what you would normally use
- Set the HyD gain to its lowest value of 10% (make sure it genuinely is 10% - occasionally the slider jumped back up to about 100% when I was doing this)
- Adjust the laser power and gain settings carefully to optimise the brightness
- This does not count for the detector in position 2, which is still a PMT and works in exactly the same way as before
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