Naoki, Nutsinee

Since we see the 0.4 Hz motion in FC IR error signal, we added a boost filter for FC IR. The new boost filter is p0.1z5 and it is in FM9 of FC_LSC_DOF2. The first attachment shows the improvement of FC IR error signal with the boost filter. The rms is reduced by a factor of 3. We modified the SQZ_FC guardian to add this filter as follows.

line 393: ezca.switch('SQZ-FC_LSC_DOF2','FM1','OFF','FM2','OFF','FM3','OFF','FM9','OFF') #disable IR sus boost

line 424: ezca.get_LIGOFilter('SQZ-FC_LSC_DOF2').only_on('FM1','FM2','FM3','FM4','FM5','FM6','FM9','FM10','INPUT','OUTPUT','DECIMATION')

The SDF is accepted as shown in the second attachment.