• KAGRA
• Subgroups
• IOO
• Meeting
• Meeting20190805

IOO meeting 2019 0708

Connection

Zoom2: https://zoom.us/j/6676627462

Participants

Ohkawa, Miyazaki, Somiya, Uehara, Guiguo, Kokeyama, Aso, Akutsu

Announcements

• The deadline of the registration for the F2F is 7th Aug. Make sure you have registered.
• If you are planning to work in KAGRA especially in the PSL, you need to attend the commissioning meeting at 1 PM on the day before and on that day.

Conferences

• August F2F meeting, Toyama, 8/22-24
  • Oral : Overview (Nakano, 5 min), OMC (Somiya, 15 min)
  • Poster : Niigata Univ.

Recent Status

PSL

• Permission at 1 PM commissioning meeting is needed for an entry.

IMC

OMC, OMMT, OSTM

• OMC commissioning is on going.
  • The wedge of OMC1 is flipped.
  • Somiya-san simulated the TRANS signal during the cavity scan with the speed in the Kasuya-san's measurement, and it indicates the estimated finesse (400) might be a correct number.
  • Modification plan is fixed.
    • Fabrication of the new jig for the alignment
    • Fabrication of the jig for the mirror gluing.

    • OBS3 will be replaced with the curved mirror with ROC of 500 mm. -> It seems to take a long to purchase.

    • The beam does not hit on QPD2. Some modification is needed. The reason why the beam does not hit the center of OBS2 is due to the ghost beam form the QPDs. (OBS2.jpg)

    • Kokeyama-san suggested cleaning the mirror by a first-contact before the jigs get ready. She will ask to Miyoki-san
  • Rough schedule chart will be made by Aso-san.
    • First start from the alignment check of the OMC cavity itself just after fabrication of the jigs. (End of Aug. ~ early in Sep.)
    • After the curved mirror for OBS3 will be delivered, assemble whole of the OMC and install it. (End of Sep.?)
• OSTM replacement

Niigata

• Double demodulation
  • First Koyama-kun will discuss with Michimura-san, and then start the experiment in Kamioka.
    • Michimura-san gave several documents about d-demod.
    • The discussion date has not been fixed yet.
• Scattering measurement
  • Tsugai-kun and Murakami-kun is working to improve the S/N ratio of the measurement, and they will have a poster at F2F meeting.

Visitor

• Rana from LIGO ~2 weeks in Sep.
• Jenny from LIGO ~ 1month in Sep.
• Anamaria from LIGO ?? in Nov.?

Travel

• Nakano to LLO ~2 weeks in Oct.

Meeting schedule

• 9/2 (Mon.)
• 10/7 (Mon.)
• 11/5 (Tue.)?
• 12/2 (Mon.)