Started reworking on EY ALS table.

Green beam was injected into the chamber and PZT servo was enabled to center the beam on QPDs. Whitening gain of QPDs were very high again so we had to decrease the servo gain by a factor of 100. Whitening gain MEDM screen was all white so we left it as is.

After confirming that the beam was centered on all four irises, we started removing the Faraday from Drever lab and realigning.

Some observations:

• EOM transmission is crappier when the beam goes through the center of the input and the output hole. It looks best when the beam is almost clipping high at the input hole and centered at the output hole.
• The steering mirror upstream of the EOM was shooting the beam down significantly.
• When we put the correct Faraday in position (in the tilted beam path downstream of EOM), there're like 12 ghost beams in transmission.

We'll level the beam path and start over tomorrow though we don't know if doing so will improve the transmission quality.