Dhruva, Vicky, Austin, Georgia

Today we did a couple more laser hazard tasks in HAM7.

H:PD1

We angled H:PD1 to follow up on Robert's scatter concerns, first attachment is the PD before, second attachment is after. We used the last two adjustable dog clamps from Camilla's supply to bolt the PD in its new orientation. Dhruv took a peek in the viewport with Robert's IR flashlight and camera set up, see third attachment for the before pic and fourth and fifth for after pics.

Seed power measurements

We measured the seed power into the fiber, on reflection of the OPO at the viewport, and on transission of the OPO at the viewport. This ratio should stay the same during pump down but we want to keep an eye on it.

Into the seed fiber: 11mW (16 on the MEDM seed power mon)

Seed refl at the periscope: 2.5 mW

Seed transmisison off beam diverter: 97 uW

• We've left the LVEA in laser hazard so we can continue working on our QPD measurements (if needed someone can transition back to safe tomorrow morning)
• We didn't remove the irises from the ISI since we're waiting to hear if Rahul will need to do potentially alignment-changing work on the ZMs