S. Dwyer, J. Oberling, L. Dartez

This afternoon we went to ISCT1 to align the green beam from the PSL Green PD, and ALS COMM PD. This is pre-peek prep so that by the time the peek takes place we don't need to worry about the beam alignment from the PSL.

We struggled a little bit to find an alignment that agreed with the crystal and the downstream PDs. We were able to get a beam onto the COMM PD. Sheila thinks that what we set up so far is more than enough to get a beatnote during the arm peek. We aligned the green beam onto the green PD but for some reason couldn't get see a readout signal that corroborated that the beam had made it onto the diode. We tried doing some troubleshooting, which included a local cable swap and adjusting the PD placement on the table. Neither were successful and, given the time of day, we opted to revisit at a later time. The important part thing is that the COMM PD _was_ seeing the beam.