Yarm Alignment

1. For Wave Front Sensing Engaging

   • After the main LSC_LOCK guardian acquires the OBSERVATION mode, open the human_EY screen from Commissioning.Doc.

   • Turn on the left top button. It indicates the alignment time.
   • Tweak the EY alignment by the green sliders on the human_EY screen.
     • - You aim the AS port signals make darker.
     • - Open the ndscope from the same screen to check the AS DC darkness.
     • - Move EY carefully and slowly!
   • Turn off the left top button to go to the real observation mode.