Kokeyama, Ushiba, Akutsu
Achieved to close/lock the ASC loops for MICH of PRMI. Fig 1 shows spectra of the error signals relevant to the ASC loops; the red ones were measured with the loop on, while the blue ones with loop off (the diaggui file was saved at the place entitled on the top of Fig 1). The UGFs of the loops would be 0.3Hz and 0.2 Hz for pitch and yaw, respectively, but we would need to do furthur investigation including direct measurement of the open-loop transfer functions and so on to confirm that. During the lock, RF90's sideband buildup (K1:LSC-POP_PDA2_RF90_I_ERR_DQ
) was (relatively) stably around 0.6 or higher.
The implementation of a gurdian script is mostly done but still on the way (maybe there are bugs), and will be completed soon hopefully... -> Now (mostly) finished by Kokeyama-san just before we left the control room (?)
Note; about the PRMI lock itself; it seems the PRMI LSC lock can be easily closed some time, but not some time... maybe the alignement of the mirrors would be related, but judging from the RF90's sideband buildup flashing, the alignment seems not so bad even when the LSC loop is in hard time to close the loop... hmm...