​​Commissioning status: 2019/9/17

​
​Interferometer locking

  • ​​Trying to lock PRFPMI
  • ​​So far, TR-CARM + RF-DARM with 3f for PRCL and MICH up to 50Hz CARM offset 
  • ​​Filter shape adjustment for hand over of TR-CARM to RF-CARM on going
​
​Issues
  • ​​Beam clipping at IFI ?
  • ​​IMC spot position on MCo does not look good
  • ​​ALS noise
  • ​​Why the fiber noise cancellation performance cannot be better ?
  • ​​Fringe from non-perfect AR ?

​
​ASC

  • ​​Modified the optical layout of REFL and AS to accommodate PZT mirrors for the QPD centering servo.
  • ​​Noticed beam clipping at the REFL port.
  • ​​It seems to be happening in IFI

​
​VIS

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​Basic damping
  • ​​Implemented on all the suspensions
  • ​​Type-B/Bp filters may introduce too much noise during the observation
  • ​​Need to implement narrow band low noise damping filters (see below)
​​
​
​Kill individual resonances
  • ​​Mostly done for all the Type-A
  • ​​Remaining problems in ETMX, ITMY
  • ​​Filters need to be readjusted as the payload temperature changes
  • ​​Need to be implemented on Type-B/Bp 
  • ​​Probably we need to fight against new resonances when we start ASC feedback
​​
​
​Actuator diagonalization
  • ​​Done for all the cryo-payloads (is this correct ?)
  • ​​Some L2A decoupling was done for BS before, but may not work properly now.
  • ​​We need to revisit L2A for Type-B/Bp
​​
​
​Sensor correction
  • ​​Implemented on ITMY,  ETMY and ETMX for IP and BF
  • ​​ITMX is IP only
  • ​​Work on going to implement this on Type-B IP
  • ​​If necessary we can implement it for Type-Bp BF
​
​Calm down mode
  • ​​Implemented for all the Type-A, but only ETMY is working.
  • ​​Need to tune the filters for the other Type-A
  • ​​Once the Type-B suspensions have low-noise damping filters, we probably want to implement a calm down state for them (noisy but powerful damping)
​​

​
​OMC

  • ​​Mirror alignment jigs arrived
  • ​​We will test them on Sept. 24 and 25 when Somiya-san comes and remove the OMC from the suspension.
  • ​​Design work on other modifications is ongoing (about 70% done)
  • ​​Test of M2052 for damping the OMC breadboard is ongoing in Mitaka by Takahashi-san

​
​PRC-PBS

  • ​​The plan is to ask LMA to make 3-inch low-loss PBS
  • ​​The coating run will be in October
  • ​​Matteo is working on the preparation of the substrate
  • ​​Most likely to use AQ crystal we have and ask a company to polish
  • ​​Mounting structure of the PBS needs to be designed
  • ​​Had some discussion among Akutsu, Matteo and Aso
  • ​​Akutsu will discuss with Hirata for making more concrete design

​
​CAL

  • ​​Low latency h(t) and Online h(t) are provided.
  • ​​Online model development is almost done. We are updating the model to increase the accuracy.
  • ​​Free Swinging Michelson test is ongoing. We tried to estimate the errors of Response functions with Mich DoF. We will estimate DARM DoF based on current measurement.
  • ​​DC fluctuation measurement has done. The estimated rms of optical efficiency is about 0.1 %. It meet our requirement.
  • ​​The test of X-end line injection is ongoing. 
  • ​​We measured the cross correlation between Pcal line and the following channels. We cannot see any coherence between the injected channel and following channels. We are monitoring the long time stability.
  • ​​K1:VIS-ETMX_MN_OPLEV_TILT_PIT_OUT_DQ
  • ​​K1:VIS-ETMX_MN_OPLEV_TILT_YAW_OUT_DQ
  • ​​K1:VIS-ETMX_TM_OPLEV_LEN_YAW_OUT_DQ
  • ​​K1:VIS-ETMX_TM_OPLEV_TILT_PIT_OUT_DQ
  • ​​K1:VIS-ETMX_TM_OPLEV_TILT_YAW_OUT_DQK1:VIS-ETMX_IM_PSDAMP_L_IN1_DQ
  • ​​K1:VIS-ETMX_IM_PSDAMP_P_IN1_DQ
  • ​​K1:VIS-ETMX_IM_PSDAMP_R_IN1_DQ
  • ​​K1:VIS-ETMX_IM_PSDAMP_T_IN1_DQ
  • ​​K1:VIS-ETMX_IM_PSDAMP_V_IN1_DQ
  • ​​K1:VIS-ETMX_IM_PSDAMP_Y_IN1_DQ
  • ​​K1:VIS-ETMX_MN_PSDAMP_L_IN1_DQ
  • ​​K1:VIS-ETMX_MN_PSDAMP_P_IN1_DQ
  • ​​K1:VIS-ETMX_MN_PSDAMP_R_IN1_DQ
  • ​​K1:VIS-ETMX_MN_PSDAMP_T_IN1_DQ
  • ​​K1:VIS-ETMX_MN_PSDAMP_V_IN1_DQ
  • ​​K1:VIS-ETMX_MN_PSDAMP_Y_IN1_DQ
  • ​​K1:VIS-ETMX_TM_DAMP_L_IN1_DQ
  • ​​K1:VIS-ETMX_TM_DAMP_P_IN1_DQ
  • ​​K1:VIS-ETMX_TM_DAMP_Y_IN1_DQ
​​
  • ​​We developed ver.4 Camera control scripts. We can read the beam position with new script. At that time, the beam position was defined by the edge of mirror. We will switch the scripts ASAP.
  • ​​We are preparing the low latency line demodulation code test with Mich DoF. 
  • ​​Real time super event monitor was developed. We plan to apply this system for injection tests. (HWI test → send the dummy signal to super event channel → test of Analysis and Offline calibration)
  • ​​Offline calibration server “calgst-hl” was developed.
  • ​​Absolute calibration setup in Toyama university was developed. LIGO will send the power standard in this week. After that, we will start the absolute power calibration of PCal.
  • ​​We are preparing the injection test in October (DAC is plaining Hardware injection test.) 
  • ​​We are developing the error estimation scripts like DARMpy.
​​

​
​PEM

  • ​​Basic installation was already completed.
  • ​​We are investigating the interferometer signal by Bruco
  • ​​MICH, DARM, SRCL, XYarm
  • ​​Investigations are posted in klog
  • ​​Hunting the serious origin of the noise source
  • ​​44Hz found in the ALS noise curve → 24V power supply placed in the PSL room → Turned off
  • ​​17.2Hz found in the MICH, SRCL → Come from the FFUs
  • ​​312.5Hz, 315Hz, 450Hz, 460Hz from vacuum pumps
  • ​​Investigating about the lightning effect
  • ​​It sometimes gives the vibration to the suspension
  • ​​Washimi-san introduced the monitor system at the entrance
  • ​​KAGRA line database
  • ​​PEM injection
  • ​​First PEM injection at ER2.
  • ​​Prepared speakers, mini-speaker, coil, mini-coil, shaker
  • ​​Xarm feedforward control system by strainmeter
  • ​​This is not PEM contribution, but I want to show it here
​​

​
​Early silent run

  • ​​Between the IFO commissioning work and suspension commissioning work
  • ​​Various interferometer condition, depending on the IFO commissioning
  • ​​We are welcome the requirement from any activities 
  • ​​Free swinging michelson, calibration line, PEM injection, hardware injection, Noise hunting, …
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