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Participants: Participants: Matteo, Simon, Pengbo, Kokeyama, Haoyu, Michimura, Aso, Akutsu, Marco, Marc
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2021 Feb 3rd, 18:00 - 19:00
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 1. recap on MIR activity
 1. Matteo had discussion with Shinkosha on how to proceed with future samples
  * a solution may be to extract a 1cm slice from the Sapphire-bulb and analyze it at NAOJ
  * if okay, Shinkosha proceeds with extracting a KAGRA-sized substrate
  * issue: is 1cm enough for a decent analysis? can the slice' planes be parallel enough?
 1. discussion about stress-dislocation measurement
  * recap by Marco about last meeting discussion
  * report by Simon about how to extract beta angle from NAOJ birefringence measurement
  * upgrade on the system at TAMA could be made after Feb 8. (if COVID situation relaxes)
 1. simulation status by Haoyu
  * TWE maps used to create birefringence maps
  * Zernicke residuals still present
  * will compare results with existing brirefingence maps
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Birefringence R&D

MIR Meeting on 2021/01/20 18:00 - 19:00

Participants: Matteo, Simon, Pengbo, Kokeyama, Haoyu, Michimura, Aso, Akutsu, Marco, Marc

Next meeting

2021 Feb 3rd, 18:00 - 19:00

Minutes

  1. recap on MIR activity
  2. Matteo had discussion with Shinkosha on how to proceed with future samples
    • a solution may be to extract a 1cm slice from the Sapphire-bulb and analyze it at NAOJ
    • if okay, Shinkosha proceeds with extracting a KAGRA-sized substrate
    • issue: is 1cm enough for a decent analysis? can the slice' planes be parallel enough?
  3. discussion about stress-dislocation measurement
    • recap by Marco about last meeting discussion
    • report by Simon about how to extract beta angle from NAOJ birefringence measurement
    • upgrade on the system at TAMA could be made after Feb 8. (if COVID situation relaxes)
  4. simulation status by Haoyu
    • TWE maps used to create birefringence maps
    • Zernicke residuals still present
    • will compare results with existing brirefingence maps

Agenda

  • update on stress-induced birefringence in Sapphire
  • simulation status
  • new sapphire bulk search
  • meeting schedule

KAGRA/Subgroups/MIR/Meetings/Minutes20210120 (last edited 2021-01-27 20:00:20 by SimonZeidler)