jennifer.wright@LIGO.ORG - posted 13:04, Wednesday 28 January 2026 - last comment - 11:57, Thursday 29 January 2026(88948)
Input power to HAM1 at 1W
Jennie W, Jason O
Jason and I added four beam dumps - two before we turned the power up, two after.
There were no beams leaving the table at 100mW but we dumped two beams going towards the PSL septum plate (one was transmission through JM1).
Jason saw one leaving the table after we were at one watt so this and the transmission throuhg JM3 + JM2 are now dumped.
PSL power into HAM1 has been returned to ~100mW and the PSL rotation stage is de-energized and locked out once again.
Pictures of the beam dump positions are attached.
BD one: BD for beam reflected towards PSL from JAC (-x direction).
BD two: beam transmitted through temporary JM3, BD (right one in photo) at edge of table nest to JM1 tip-tilt (in its temporary position in bottom right of photo).
BD three: BD in bottom of picture added for beam transmitted through temporary JM1.
Photo of both BD 1 and 3 zoomed out.
BD four: BD on -x side of table (towards HAM2) catching beam transmitted through JM2, shown in mid-left of photo.