Contents
Meeting information
Date and Zoom link
Wednesday Nov. 26th 15h JST on KAGRA Zoom 2 : https://zoom.us/j/6676627462
Participants
Y. Aso, M. Eisenmann, M. Otsuka, B. Park, S. Singh, K. Yamamoto, R. Watanabe
Next Meeting
- December 10th usual time
SRM
New ITMs preparation
Polishing
* Nikon would like to do birefringence cross-check
- One of their device is from another Nikon division which makes measurement dangerous
Coating
- all specs similar as previous (except for the Ti doping)
- ask for point absorbers map
- U. Toyama measured coating Q at room temperature (will be presented at JPS)
Other characterization
- Post-O4 :
- TM Q measurement (linked to frosting?)
- PRC loss to estimate substrate scattering?
- ITMs cleanliness check?
Ear bonding
Need for spares
TDR
- Prepare a TDR for New ITMs preparation :
draft : https://www.overleaf.com/5932423716twgzgrbvyrtc#712b63
- People should pick sections they want to write
- deadline for document is soon hopefully
- will be follow-up by review (K+LV)
Absorption measurement
- NAOJ : no news
- KASI :
- Measured N-BK7 and absorption NB : gives clear signal
- sapphire measurement kind of reproducible
- estimated resolution around 14ppm/cm
- collab with NAOJ for clibration sample and sapphire + possibly U. Adelaide
Birefrigence measurement
Spectroscopy