Differences between revisions 1 and 12 (spanning 11 versions)
⇤ ← Revision 1 as of 2022-07-05 14:53:53 →
Size: 156
Editor: matteo.leonardi
Comment:
← Revision 12 as of 2022-07-06 17:08:08 → ⇥
Size: 1073
Editor: matteo.leonardi
Comment:
Deletions are marked like this. Additions are marked like this.
Line 2: Line 2:
Participants: Participants: Matteo, Haoyu, Marc, Abe, Tomaru, June Gyu, Dan Chen
Line 5: Line 5:
2022 Aug 3, 15:00 - 16:00 2022 Aug 4, 15:00 - 16:00
Line 8: Line 8:
 1.
 1. Sapphire substrate sent to LMA from KYamamoto to do a first attempt for Ti:GeO2 deposition
 1. Report on Aztec substrates characterization from Marc
  * absorption:
   * four substrates characterized,
   * #3 meets the specs (45ppm/cm), #1 almost meets the specs (60ppm/cm), #2 and #4 don't meet the specs (110ppm/cm and 90 ppm/cm)
  * birefringence:
   * explanation of improved calibration system
   * aztec #3 characterization results: dn = (2+/-1)*1e-6, theta = 4deg
   * losses below 1% due to birefringence
  * scattering:
   * IR camera installation ongoing to measure scattering on PCI setup
   * IR and red measurement planned to distinguish between Rayleigh and Mie scattering
 1. Report of scattering measurement from Abe
  * 10% - 30% losses on green
Line 11: Line 23:
 *  * Aztec sample characterization
 * sapphire coated with Ti:GeO2 (tentative)
 * SIM update

MIR Meeting on 2022/07/06 15:00 - 16:00

Participants: Matteo, Haoyu, Marc, Abe, Tomaru, June Gyu, Dan Chen

Next meeting

2022 Aug 4, 15:00 - 16:00

Minutes

  1. Sapphire substrate sent to LMA from KYamamoto to do a first attempt for Ti:GeO2 deposition

  2. Report on Aztec substrates characterization from Marc
    • absorption:
      • four substrates characterized,
      • #3 meets the specs (45ppm/cm), #1 almost meets the specs (60ppm/cm), #2 and #4 don't meet the specs (110ppm/cm and 90 ppm/cm)
    • birefringence:
      • explanation of improved calibration system
      • aztec #3 characterization results: dn = (2+/-1)*1e-6, theta = 4deg
      • losses below 1% due to birefringence
    • scattering:
      • IR camera installation ongoing to measure scattering on PCI setup
      • IR and red measurement planned to distinguish between Rayleigh and Mie scattering
  3. Report of scattering measurement from Abe
    • 10% - 30% losses on green

Agenda

  • Aztec sample characterization

  • sapphire coated with Ti:GeO2 (tentative)

  • SIM update

KAGRA/Subgroups/MIR/Meetings/Minutes20220706 (last edited 2022-07-06 17:08:08 by matteo.leonardi)