Lucia, Keiko

Continued from yesterday, we commissioned DHARD loops with AS WFSs. DHARD is differential EX and EY without ITMs.

We could see the signals:
Spectrum measurement
/users/kokeyama/asc/diaggui/20200407/ASC_ETM_DIFF(2)_{P,Y}.xml (attached screenshot, 0.4 Hz exc)
TF from DHARD EXC to DHARD IN1 (err) without closing) the loops
/users/kokeyama/asc/diaggui/20200407/ASC_DHARD__{P,Y}.xml (measured the one loop gains and phases)

It improves the arm buildup during PRFPMI lock (with omc) however the lock lasted only ~10mins. Because of the too short time of testing, we cannot tell those locklosses  are related to this loops or not.

Currently, "observation" mode is not include the loops. I might test a bit more during my operation shift (properly transiting to or out from observation mode)