Reports until 18:23, Thursday 11 January 2018
H1 IOO (IOO)
cheryl.vorvick@LIGO.ORG - posted 18:23, Thursday 11 January 2018 - last comment - 18:32, Thursday 11 January 2018(40112)
beam alignment on REFL confirmed, running a program overnight to scan the PZT to map out PZT vs MC2 Trans beam(s)

- Jenne, Cheryl, Keita

Jenne and I confirmed that the beam from the PSL did not require any adjustments. The REFL beam was present on IOT2L and the beam was on the REFL camera.   On IOT21L we adjusted the alignment of the REFL path to clear the iris/HWP/CalciteWedge combination of optics and cleanly dump beams before the 2" steering mirror to the REFL diode, and after those adjustments we restored the beam to the REFL camera.  Because we're not using WFS at this time, the beams onto WFSA and WFSB were not adjusted.

Searching for the good beam found yesterday, it was found again today, however, as we walked the PZT and MC1 the power dropped steadily.  I went to HAM3 West door and took a few pictures with the IR camera, and saw that there was a large beam on the beam dump post that is in from of MC2 Trans.  We confirmed this beam as the reflection from MC3, and drove MC3 and MC2 alignments to ensure that there are no IMC mirror reflections coming back to HAM3.

Talked to Keita, plan is to scan the PZT to look for a beam(s) on MC2 Trans QPD, because we calculated the angle needed to move the beams on MC2 Trans (600urad) and the PZT should have the range to put the real beam on the QPD.

Jenne is running two AWGGUIs on ZOTWS1 that has a sticky note on the left monitor saying "In Use" to control the PZT overnight.  The PSL power is at 2.7W (requested 4W).  Alignment of the IMC mirrors should not be changed until tomorrow morning (end of test).

The PZT scanning will be complete well before 6:30AM, so HAM2 HEPI locking and scaffolding work should proceed as planned.

Comments related to this report
cheryl.vorvick@LIGO.ORG - 18:32, Thursday 11 January 2018 (40113)

Snapshots of the alignment of IMC optics and PZT (alignment sliders), and the PZT medm showing the excitation channels being used to drive the PZT.

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