[Michael R., Guido M., Rick S., Chris M.]

The input optics on the PSL table have been moved from H2 to H1.  The main beam path is aligned up to the bottom periscope mirror which has been left in the cabinet for safety.  All of the auxillary beams are aligned as well, but most of the electronics are yet to be installed (rfpd, dcpd, piezo mirror).  The alignment is as shown in D0902114.  

The periscope spacers have also been moved from H2 to H1 but are actually off in height by 1.25 inches.  New spacers are being machined and should be ready to be installed within the next month.  
We looked at the mode matching into the interferometer using beam scans with the WinCam.  The overap (in power) between the fitted beam and the mode cleaner mode is 98.7%.  The data wasn't robust enough (Rayleigh range is too large) to fit an M^2 value though.  The attached plot Mode_Matching_to_IMC.pdf shows the measured data with fits as well as the ideal beam.  

The H2 EOM has been moved to the H1 table which means that the sideband frequencies will all need to be modified.  Volker Q. will work on this when he is here in the middle of July. Hopefully the final RF system will be in place by then.  

For now we have checked out the AM/PM ratio for the 8.68 MHz sideband.  As usual with RFAM the measurement was not completely conclusive.  We initially measured a value of 4.9e-4, but were able to bring it down to 1.5e-4 by adjusting the alignment on the PD (without any significant change in the DC value).  We also put an iris in front of the PD and by adjusting the aperature size were able to bring it down to 4.9e-5 again without any significant change in the DC value.  Our hypothesis is that it is caused by scattered light possibly from the blocked s polarized beam from the EOM.

Methods of measurement and definitions of modulation indices can be found in an attachment to https://alog.ligo-la.caltech.edu/aLOG/index.php?callRep=2901.  The attached spreadsheet H1_PSL_Data.ods contains the data described above.