New ITMs preparation

Polishing

* Crystals sent to Nikon and inspection on-going * pre fine-polishing planned to remove scratches will be paid by Okamoto * Meeting planned with Nikon mid-May to report about scratch removal and final schedule

Coating

Meeting with LMA after the meeting with Nikon
Especially we need to know if they can do TWE+birefringence measurement next year
Possibility for KAGRA MIR people to go there and collaborate on these activities

Absorption measurement

KASI/NAOJ collaboration planned on KASI's PCI developmnent
at KASI, 1064nm laser too noisy so now focusing on 1550nm (up to 10W)
useful measurement to understand 1064nm absorption together with 2um absorption measurement at Adelaide University and spectroscopy at NAOJ