Week of June 2nd

[YoshinoriFujii]

Todo

• measure the the following spectra for each suspension:

  • [x] w/ inertial damping
    • [x] IX, see ${dir_t}/ITMX/Measurements/20190602/ITMX_mointor_w_inertial-damping.xml [1]
    • ~IY~
    • [x] EX, see ${dir_t}/ETMX/Measurements/Spectra/20190602/ETMX_mointor_w_inertial-damping.xml [1]
    • [x] EY see ${dir_t}/ETMY/Measurements/Spectra/20190602/ETMY_mointor_w_inertial-damping.xml [1]
  • [ ] w/ LVDT damping
    • [ ] IX
    • [ ] IY, see ${dir_t}/ITMY/Measurements/20190602/ITMY_mointor_w_LVDT-damping.xml [1]
    • [ ] EX
    • [ ] EY
  • [ ] w/o damping
    • [x] IX
    • [ ] IY
    • [ ] EX
    • [ ] EY

• [ ] measure the time series of IPs in L and the seismometers of all the suspensions w/o control.

• measure TF of BF-LVDT in L and Y

  • [ ] w/ inertial damping
    • [ ] IX
    • ~IY~
    • [ ] EX
    • [ ] EY
  • [ ] w/ LVDT damping
    • [ ] IX
    • [ ] IY
    • [ ] EX
    • [ ] EY
  • [ ] w/o damping
    • [ ] IX
    • [ ] IY
    • [ ] EX
    • [ ] EY

• [ ] modify the BF-Yaw filter for ITMX.

• [ ] adjust the GAS positions and close the control loops.

• [x] Measure IM to TM transfer functions in P/Y

  • [x] IX, see ${dir_p}/ITMX/TF/Measurements/20190603/IMexc/ [2]
  • [x] IY, see ${dir_p}/ITMY/TF/Measurements/21090603/IMexc/ [2]
  • [x] EX, see ${dir_p}/ETMX/TF/Measurement/20190603/IMexc/ [2]
  • [x] EY, see ${dir_p}/ETMY/TF/Measurements/20190603/IMexc/ [2]

---

• Reference
  • [1] dir_t=/users/VISsvn/TypeAtower/
  • [2] dir_p=/users/VISsvn/TypeApayload/

[YoshinoriFujii]

• [ ] check the following GASs and fix them definitely mechanically.

[YoshinoriFujii]

prep

• I opened the following filters, about the payload:

  • K1:VIS-ETMY_TM_LOCK_L, HPF1, with 1.

= IX =

• TMY2P01, P01 to MNY, for 0.34Hz, with 1
• TMYP02, P02 to TMY, for 3.23Hz, with 0.3
• TMY2P03, P03 to MNY, for 0.082Hz, with 100

= EX =

• TMY2P01, P01 to MNY, for 0.327Hz, with 4

= IY =

• It seemed nothing was registered today.

= EY =

• TML2P01, P01 to 0, for 0.632Hz, with 1
• TML2P02, P02 to 0, for 0.632Hz, with 1
• TML2P03, P03 to 0 , for 1.67Hz, with 1
• TMY2P04, P04 to MNY, for 1.69Hz, with 1
• TMY2P05, P05 to MNY, for 0.34Hz, with 1
• TMY2P06, P06 to TMY , for 3.21Hz, with 1
• TMP2P07, P07 to MNP, for ~3.21Hz~ 0.85Hz, with 1
• TMP2P08, P08 to TMP, for 7.57Hz, with 1
• TMY2P09, P09 to TMY , for 1.67Hz, with 200

---

• reference

[YoshinoriFujii]

see Weekly-task/issues/17

ITMX

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PRACTICAL NOTES

• From 13:16JST,

  • trying to switch off the inertial-damping and turn on the LVDT damping:

  • off-load K1:VIS-ITMX_IP_DAMP_L_OUTPUT using K1:VIS-ITMX_IP_COILOUTF_{H1/H2/H3}_OFFSET.

  • Before:

  • After:

  • opened BF-Yaw damping control

  • opened IP-L/T/Y inertial-damping controls, 3 of them.

  • opened blending loops:

    • Before
    • After

[YoshinoriFujii]

On June 3rd

10:06JST

• IY

• EX

---

[YoshinoriFujii]

EX

• before