This morning I was able to measure the beat noise down to 12.5 mHz. So I plot it together with the noise budget here.
We also added channel for frequency counter,C3:PSL-FSS_FREQCOUNT which will allows longer data acquisition time for lower frequency.
Then we will be able to see the temperature effect at lower frequency(~ 10 mHz.)
Fig1: beat signal at 12.5 mHz to 10 Hz
We are also working on PID thermal control for refcav.
Perl script for PID thermal control won't work on Solaris because it doesnt have ezcaread/write command, we will get that from op40m machine at the 40m.
(We can't run Perl script on Linux because it complains that it fails to read / write data from C3:PSL-FSS_HEATER.)