Reports until 02:24, Friday 13 December 2019
H1 IOO (IOO)
cheryl.vorvick@LIGO.ORG - posted 02:24, Friday 13 December 2019 - last comment - 03:24, Friday 13 December 2019(53878)
new HAM2 East door camera

On December 3rd I moved the HAM2 East door camera to a new port, and pointed the camera to look at AOE2, the beam dump for Calcite Wedge 2's forward rejected beam, the steering mirror for that beam, and the HWP baffle in the IO FI. 

 

The camera view is rotated counterclockwise by 90 degrees, so the top of the image is to the right in HAM2.  The focus is a bit farther back than intended, with the best focus being on the IO FI HWP baffle aperature, near the top of the image (to the right of AOE2).

Using HAM2 coordinates, the first component fromt the left is the IO beam dump.  This has a beam coming from the left, and hitting the outside of the beam dump.  The beam dump frame, that holds the SiC plates, is illuminated on the left and along the top, and here is where one can see the best example of the changing illumination from IR light.  Inside the beam dump, on the right, there is a beam which appears to e hitting the right of the beam dump, on the inside, which appears to be dumped directly on the metal side plate.

From center and to th right, is the back of AOE2.  The metal frame is visible, and the aperture in the front SiC baffle is surrounded by IR light.

To the far right one can see most of the IO FI HWP baffle aperture, meaning that the top and sides of the aperture are clear, but the bottom of the aperture is not, and that is because it's blocked by the steering mirror that sends the forward rejected beam to the beam dump.

Attached images were taken from both the East door and top viewport, and show AOE2, and the input to the IO FI, including CW1.

 

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cheryl.vorvick@LIGO.ORG - 03:24, Friday 13 December 2019 (53879)

Attachment document shows both visible and the IR images from the East door.
In the previous images, it's possible that PRM was misaligned while I was taking photos, so some of the beams seen on baffles could be a result of that misalignment.

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