Here is a list of tasks I think we should prioritize for the next two weeks. The idea is to get back to the previous state of being able to do single arm, PRMI-on-carrier and DRMI locking, before making further changes.
Once the new folding mirrors arrive, I'd like to modify the SRC length to allow locking in the signal-recycled config as opposed to RSE. Still need to do the detailed layout, but I think the in-vacuum layout will work. In that case, I'd like to also move the OMC and OMMT to the IY table, and also move the in-air AS photodiodes to the IY in-air optical table. This is why I've omitted the OMC alignment from this near-term list, but if we want to not move the OMC, then we probably should add alignment of the AS beam to the OMC to this list.
List of in-chamber tasks for 1/2019
| Chamber |
Task(s) |
| EY |
- Clean ETMY optic and suspension
- Put ETMY suspension back in place, recover Y-arm cavity alignment
- Remove any residual hardware from unused heater setup
- Restore parabolic heater setup, center radiation pattern as best as possible on ETMY
- Check beam position on IPANG steering mirror
|
| IY |
- Clean ITMY optic and suspension cage
- Restore ITMY suspension, recover Y arm cavity alignment.
- Check position of AS beam on OM1/OM2
|
| BS/PRM (if we decide to open it) |
- Replace BS/PRM Oplev HeNe, bring the beam in and out of vacuum with beam well centerd on in-vacuum mirrors (can take this opportunity to fix the in-air layout as well to minimize un-necessary steering mirrors)
- Check position of AS beam on OM3/OM4, adjust if necessary
- Check position of IPPOS and IPANG beams on their respective steering optics
|
| OMC (if we decide to open it) |
- Check position of AS beam on OM5/OM6
- Ensure AS beam exits the vacuum cleanly
|
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