Participants : Y. Aso, M. Eisenmann, M. Otsuka, S. Singh, K. Yamamoto
- New ITMs preparation :
small cracks removed by Oktamoto and accepted by Nikon polishing started at Nikon and should last 1 year (up to ~Sept/Nov 2025) ; should have a more realistic schedule in the coming week to then discuss with LMA birefringence and Q measurements before/after coating if time allows
- Coating at U. Toyama :
will restart measurement soon : TAMA coating on sapphire disk with better temperature resolution waiting GeO2 recipe of LMA which is delayed du to O4 delay maybe blistering solved and better performances at cryo temperature ?
- Sapphire spectroscopy at NAOJ :
got iLM/LMA sample and waiting for instrument availability to start measurement with s-polarized light
- birefringence measurements at NAOJ :
final checks for 1D measurements and preparation of 2D measurements
- Parametric Instabilities :
now doing mechanical simulation to reproduce Kaihotsu-san result At cryogenic temperature there is a discrepancy of C14 parameter between litterature and thesis.. However, Kaihotsu-san simulation was confirmed with room temperature measurement Maybe more information in Yukino Mori thesis with value measured on sapphire disk