Reports until 20:17, Tuesday 19 August 2014
H1 ISC
koji.arai@LIGO.ORG - posted 20:17, Tuesday 19 August 2014 (13502)
HAM6 alignment

[Alexa Dan Koji]

- We aligned the OM1 transmission path again. The AS_C QPD alignment was reestablished. We can use this QPD as the alignment reference.

- The alignment of the fast shutter was revisited and now we can accommodate the beam without the extra legs. We removed the 20mm leg extentions and the placed the beam dump at the designated place.

- OM2 and OM3 were moved so that we can see the spots on the QPDs.

- We think the beams are on the diodes. In fact the diode SUM outputs are responding to the beam.
  However these QPD outputs do not give us linear response to the input alignment.

- We checked the electronics outside of the chamber including the cables from the feedthrough.
They don't show any misbehavior. (Basically we swapped the electronics between OMC QPDs and AS_C.

- We'll investigate the QPD functionality tomorrow.

- We'll want to shake the PZT of the OMC sometime soon.