Participants : M. Eisenmann, M. Otsuka, S. Singh, K. Somiya, K. Yamamoto
Agenda :
* New ITMs polishing update (M. Eisenmann)
- Preparation of bidding for next step polishing on-going
- Birefringence measurement update (S. Singh)
- Analysis seems good; plan for 2D measurements + on-site measurement
- Q measurement and simulation update (K. Yamamoto)
- Yamada-san and Rishabh busy... K. Yamamoto can give updates in the meantime
- dummy mirror suspension on-going from next month
- Coating and U. Toyama activities (K. Yamamoto)
- Coating mechanical loss at cryogenic temperature paper was accepted
McGhee (Glasgow) visit from end of March to July to measure amorphous Silicon coating mechanical loss at 100K
- In future plan to exchange samples to compare GENS and nodal support techniques
- Yu Sato will finish Master thesis about PI in Feb 2025
- It seems that mode shape depends on a-axis direction
- PI simulation (M. Otsuka)
- optical simulations on-going with goal of estimating modal content of coupled cavity
- New AZTEC samples characterization + spectroscopy (M. Eisenmann)
- Could estimate impact of impurities on 1064nm absorption and compare it with PCI absorption for few samples
- Plan to do spectroscopy measurements with s-polarized light
- Plan to have new holder to test new AZTEC samples
- Possible crystalline materials conference? (M. Eisenmann)
- Opening of Kakenhi for conference support
- There are ASPIRE and bilateral calls aswell (K. Somiya)
- There are interest but should further discuss to avoid competing with each others
- Discussion
- Thermal noise derived from new coating mechanical loss should become KAGRA official value
- This new value was used by Komori-san in the 10 years sensitivity simulation