Alexa, Rana, Sheila, Kiwamu

We continued working on the carrier PRMI tonight as a part of the too-low recycling gain study. No new result -- the recycling gain stayed as high as 15 and reflection remained 30-ish %.

Then we switched the effort to the sideband locking to get ready for the upcoming full interferometer locking, but no luck in catching a fringe for unknown reason. We woll continue working on the sideband locking during the weekend.

(Carrier lock automation)

We worked on an automation of the carrier lock using the guardian for the carrier lock configuration. We tested the code by letting it lock the PRMI. It runs fine.

(Camera adjustment on PRM, PR2 and PR3)

As a part of the intracavity clipping study, we readjusted PRM, PR2 and PR3 GigE cameras to have a better focus on the infrared images. The attached are screenshots of those cameras after the readjustment of focusing and zooming. The PRMI was locked on the carrier.

Some observations:

• PRM baffle tends to show a scattering on the left side of its image.
• PR2 image showed a small spot-like scattering. We did not locate where it correponds to.
• PR3 tends to have a bright scattering below the optic even though the beam does not look super low on the mirror.

(PRMI carrier WFSs preparation)

We started looking at the WFS signals in order to aling the PRMI without keep clicking the sliders on the screen. Tonight, we made a single measurement -- which is a sensing coefficient from IM4 to WFS A and B.

WFS_A_RF9_I_PIT = 4.8 [wfs cnts/ IM4 pitch cnts]  (-172 deg)

WFS_B_RF9_I_PIT = 6.6 [wfs cnts/ IM4 pitch cnts]  (1 deg)

WFS_A_RF9_I_YAW  = 0.9 [wfs cnts/ IM4 pitch cnts]  (0.4 deg)

WFS_B_RF9_I _YAW = 1.36 [wfs cnts/ IM4 pitch cnts]  (3.5 deg)