WP#10256. TJ, Georgia, Ryan, Camilla. Continued from alog 62408
Summary: There is a return beam from ITMX on HWSX CCD. It doesn't look as big as hoped. Will run TCS tests this weekend. Work was slowed down by me not noticing the camera frame rate was set too high/exposure too low to see the beam. Currently all now set to 1Hz.
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Leaving picomotor settings as: |
X | Y |
| #1 - X lower periscope | -200 | +100 |
| #2 - X upper periscope | 0 | -204 |
| #7 - HWS X M2 HAM4 (closest to table) | 7547 | 2467 |
| #8 - HWS X M1 HAM4 (closest to SR3) | -5086 | 4265 |
As I previously noted in alog 62408 we were close to in vacuum clipping in yaw and the ALS beam got much nicer when we yaw'ed in vacuum but this clipped the upper periscope mirror. We moved the periscope ~1' i the +y direction and rotated in as we ran out of yaw range. We did not move the lower periscope mirror. In hindsight I'm not sure this was necessary as our exposure was too low but now we are much further from clipping. Photos of periscope before and after attached.
we were close ion In the past we've used 57Hz for the ITM HWS cameras but currently ITMY is using 1Hz so a ~1 second exposure. Once we changed to this we saw a return beam. Yay! We made adjustments using the in-vac and periscope pico-motors but couldn't get the alignment much better. Photos attached, plate on with 1Hz exposure and plate off with 5Hz exposure and different ranges. Will run ring heater tests over the weekend to see if we are aligned on ITMX.
Replaced green filters on both ITMX and ITMY CCD cameras. Started the HWS code.
