T Vo, Sheila

We aligned PRMI a little bit.  We started with PRX and PRY, and saw that our PRM alignment for PRX and PRY fringes has shifted by about -300 urad in pitch since Jan 17th.  We used picomotors to center the IMC WFS because we saw that there was a shift on IM4 trans QPD today around the time that Cheryl would have been on IOT2L.  Centering only moved IM4 trans a small amount back to where it was before Cheryl's work.  We aren't sure if this is the reason for the shift in alingment of the input beam. 

I was able to see PRMI flashes, not well alinged, by moving PRM, PR2 and BS, the overall impact was to move PRM back towards the Jan 17th alignment.  We now have flashes on POP 90 of around 10 counts, (there is a 10 count offset, so flashes go up to 20 counts) with 1.2 Watts into the interferometer.   We should be getting something like 100 count flashes, but it might just be that we aren't well aligned yet.  I haven't adjusted anything on the table or adjusted teh demod phase, although the demod phase seems OK. 

The attached screenshot shows the alingment for which we get small sideband flashes in POP90.