The main laser can be attenuated with a waveplate just after the RP attenuator. To adjust the angle go to FACETHOME→Laser→LI20→Infrastructure→XPS moc-la20-ls24, channel 1.
Minimum energy corresponds to a waveplate angle of 74deg, maximum energy to an angle of 119deg.
The output energy of the attenuator as a function of waveplate angle was measured on 6/22/2022 as:
