R&D (FilterCavity)
YuhangZhao - 01:00, Thursday 12 December 2019 (1938)
Coherence check between oplev and correction to FC length

Shoda and Yuhang

We checked the coherence between each suspended mirrors oplev signal and correction signal to FC length. The situation is summarized as follows.

The coherence below 0.5 is not mentioned. For the detail, please check the attached figures.

 

pitch

yaw

PR

almost no coherence

almost no coherence

BS

almost no coherence

almost no coherence

Input

coherence of 0.8 @ 9Hz

almost no coherence

End

around 2~5Hz coherence of 0.8

around  2~4Hz coherence of 0.6

Images attached to this report
1938_20191212084650_prp.png 1938_20191212084659_pry.png 1938_20191212084718_bsp.png 1938_20191212084725_bsy.png 1938_20191212084736_inputp.png 1938_20191212084755_inputy.png 1938_20191212084806_endp.png 1938_20191212084815_endy.png