- ChrisW, Keita, Kiwamu, Cheryl, Corey (yesterday)

IMC locked today with the alignment of last night.  Before this happened, Kiwamu had to set the phase using external switches on the Beckoff.  Using 100mW of power from the PSL, REFL DC unlocked = 200, and locked was ~20-ish.

A search for MC TRANS turned up nothing, so I increased the PSL power to the January value of 250mW.  This increased REFL DC to about 500.  This also helped Chris and I find the MC TRANS beam hitting the bellows to the +X side of the aperture of the table enclosure by about 2.5 inches.

To check the IMC and MC TRANS alignment, I looked at the beam downstream of MC3 at the  input to the FI, which showed no sign of clipping, and there was no sign of clipping on the baffle in front of IM4, AOE2.  The REFL-to-HAM1 baffle showed only a slight amount of clipping, with no adjustment to PRM , so alignment behind the IMC looks good, and does not explain MC TRANS.  The only explanation is that the MC TRANS 2" steering mirror was bumped out of alignment during the vent.

The solution is to make a new back pannel and shift the MC TRANS optics on IOT2L by about 2", to the new beam.  There is realestate on the table to do this.  Moving the entire table to capture MC TRANS  isn't an option, as it would cause MC REFL. to clip on it's baffle.

IMC locks show a lot of satability, and the IMC relocks easily.  At 250mW PSL power, IMC visibility was around 90%.

After our work on MC TRANS, Chris worked on WFS - see his alog.