Reports until 17:25, Saturday 09 May 2015
H1 ISC
eleanor.king@LIGO.ORG - posted 17:25, Saturday 09 May 2015 (18343)
SRC length measurement attempt

Nutsinee, Elli

We came in today to lock DRMI and measure the SRC length.  Spent the morning locking trying to lock DRMI, we were finding initial alignment difficult.  We changed H1:LSC-REFL_A_RF9_WHITEN_GAINSTEP to 7 so that we could lock PRX.  In the afternoon we tried to take a DRMI cavity scan measurment using the auxiliary laser.    We unplugged BBPRrefl power (power to 3f PD) on ISCT1 while measuring, and plugged it back in at the end of the day.   The SNR looked poor so we have added an RF amplifier ZFL-2500VH+ to the 1611 PD on ISCT1. (This is now the same setup we were using on ISCT6.)  At this point we handed the interferometer over to Evan.  We had a chat to him about our troubles with DRMI alignment, and will try again soon.