This morning I adjusted the x-arm alignment to obtain green locking. First I misaligned ETMX, and adjusted TMSX using the ITMX baffle PDs. See table below for configuration:
|
Old Average (alog 13741) |
Target PD1 | Target PD4 | new Average | |
| TMSX (P,Y) | (-23.8, -320.1) | (-58.1, -292.7) | (9.6, -354.9) | (-24.25, -323.8) |
NOTE: he baffle PDs read 2.4V at 0dB gain.
Then, using the ETMX camera I centered the beam on ETMX by adjusting the ITMX alignment. I found ITMX (P,Y) = (74.7, -8.2). Finally, I maximized the flashes by aligning ETMX. H1:ALS-X-TR_A_LF_OUT reached about 0.85 cnts. With this alignment we were able to lock the green beam to the arm. The alignments are saved to the guardian.
The dither alignment in yaw helped bring the counts up to about 1. The pitch dither made things worse.