Participants : M. Eisenmann, D. Haba, S. Lee, M. Otsuka, K. Somiya, K. Takeshita, R. Watanabe, K. Yamamoto
- Birefringence measurements at NAOJ:
new AZTEC samples (30 mm diameter) : birefringence seems good (10**-7 or below) and limited by holder's stress Currently 3D printing new holders that should remove stress iLM/LMA sample have larger birefringence iLM starts to sell sapphire substrates
- Parametric instabilities :
Can simulate TEM00 but some issues with HOMs discussion with Hiro Yamamoto planned
- Coating measurement at U. Toyama :
NAOJ coating measurement slightly postoned due to He leakage (restart next week) New actuator/transducer designed (half area of previous one with similar pattern electrodes)
- new ITMs HCB bonding preparation at U. Toyama :
planned for 2026 currently preparing the cleanroom
ASC with birefringence at TiTech :
computing SN of jitter vs QPD shot-noise checking with optimized QPDs 4 split PD simulation with finesse on-going
- absorption measurement at KASI :
setting up the PCI