Reports until 18:54, Tuesday 24 July 2012
H2 ISC
alberto.stochino@LIGO.ORG - posted 18:54, Tuesday 24 July 2012 (3577)
ALS PLL Locked

[Alberto, Bram]

Today we were able to locke the ALS PLL again with similar settings as we used before. The laser temperature was 42.10 degrees when the beat note was at the working point frequency (40MHz).

We don't clearly understand why yesterday the laser temperature couldn't go above 38.45 degrees. Maybe the laser was getting some unwanted offset at the slow input from the slow controls connection? We didn't check that.