Similar to the work on klog #21759.
For this work the green Y shutter was closed since some scattered light was seen on POP and POP_P cameras.
The camera images and value of CAM_SUM and CAM_EXP have been recorded in two configurations: first with Yarm unlocked and ETMY misaligned, second with Yarm locked. The results are in fig1 and fig2 respectively and in the following tables.
Yarm unlocked and ETMY misaligned (fig1)
| EXP | SUM | dSUM | SUM/EXP | dSUM/EXP | |
| POP | 684 | 4.90E+06 | 1.00E+05 | 7163.74 | 146.20 |
| POP_P | 5661 | 2.65E+06 | 5.00E+04 | 468.12 | 8.83 |
Yarm locked (fig2)
| EXP | SUM | dSUM | SUM/EXP | dSUM/EXP | |
| POP | 586 | 4.30E+06 | 1.00E+05 | 7337.88 | 170.65 |
| POP_P | 35000 | 4.00E+06 | 1.00E+06 | 114.29 | 28.57 |
The results as well as the beam shapes seem consistent with what previously reported.
In addition, fig3 shows the time series of K1:CAM-POP_P_SUM and K1:TMS-Y_IR_PDA1_OUT16 while Yarm is locked. It seems the two signals are anti-correlated.
In this configuration, POP-YarmL.avi and POP_P-YarmL.avi have been recorded. The shape of the beam does not change a lot on POP despite the beam moving around while on POP_P the beam shape changes a lot.
