Differences between revisions 6 and 9 (spanning 3 versions)
⇤ ← Revision 6 as of 2019-05-21 13:56:17 →
Size: 2004
Editor: OsamuMiyakawa
Comment:
← Revision 9 as of 2019-05-21 16:44:55 → ⇥
Size: 2562
Editor: OsamuMiyakawa
Comment:
Deletions are marked like this. Additions are marked like this.
Line 11: Line 11:
 * 5/17~ increasing ETMY temperature.
Line 13: Line 12:
 * 6/8: Engineering run
Line 14: Line 14:
 * Center  * ITMX
  * 5/22AM~: tuned off cryostat cooler, finesse measurement for Xarm
Line 16: Line 17:
 * ITMX:

 * Xend		  * ETMX
Line 22: Line 21:
 * Yend  * ITMY
  * 5/23AM~: tuned off cryostat cooler, finesse measurement for Yarm
 * ETMY
  * 5/17~: tuned off ETMY cryostat cooler
  * 5/24PM~ inject 100Pa Nitrogen.
  * 5/27 evacuation of Nitrogen.
  * 6/3-6/14: Installation of TMS for ETMY
Line 24: Line 29:
 * End of April~: Y arm commissioning
 * ~End of May: Y arm and FPMI commissioning


 * Yarm COM. Lock by IR, mass feedback 5 week 4/22-5/31
 * DRMI Lock 5 week 5/27-6/30
 * DRFPMI Lock 6 week 7/1-8/9
 * DRFPMI ASC Alignment Sensing Control 8 week 8/12-10/4
 * Post Commissioning Tuning PRC, SRC middle baffle 6weeks 10/7-11/15
 * Noise hunting Re-lock, noise hunting 4weeks 11/18-12/13
Line 68: Line 80:
 * Chance for Y arm finesse measurement: 5/21, 5/23  * Chance for Y arm finesse measurement: 5/21, 5/23 and after 5/29 of evacuation of Nitrogen

2019/5/21 15:00-16:00 Weekly commissioning meeting topics

Schedule

  • 5/14: RT PC maintenance -> go to safe mode for all VIS connected Dolphin (BS, )

  • 5/20-24: Exchanging cryo valves.
  • 6/8: Engineering run
  • ITMX
    • 5/22AM~: tuned off cryostat cooler, finesse measurement for Xarm
  • ETMX

    • 5/2: Cooling start

    • 5/29: Cooling done
  • ITMY
    • 5/23AM~: tuned off cryostat cooler, finesse measurement for Yarm
  • ETMY
    • 5/17~: tuned off ETMY cryostat cooler
    • 5/24PM~ inject 100Pa Nitrogen.
    • 5/27 evacuation of Nitrogen.
    • 6/3-6/14: Installation of TMS for ETMY
  • Yarm COM. Lock by IR, mass feedback 5 week 4/22-5/31
  • DRMI Lock 5 week 5/27-6/30
  • DRFPMI Lock 6 week 7/1-8/9
  • DRFPMI ASC Alignment Sensing Control 8 week 8/12-10/4
  • Post Commissioning Tuning PRC, SRC middle baffle 6weeks 10/7-11/15
  • Noise hunting Re-lock, noise hunting 4weeks 11/18-12/13

Discussion

Low finesse issue on Y arm

  • Status as of now
    • 2019/5/17(Thu)
      • X-arm:
        • Finesse = 1399
        • Power build-up factor = 891
        • Ring-down half-life = 3.11msec
        • REFL POWER locked/unlocked = 0.96
      • Y-arm:
        • Finesse = 28
        • Power build-up factor = 18
        • Ring-down half-life = 0.42msec
        • REFL POWER locked/unlocked = 0.50 (agrees with experiment)
    • 2019/5/17(Thu)
      • Finesse of Yarm for green: 17 (design 50)
    • 2019/5/17(Fri)
      • Finesse of Yarm for IR: 120, ETMY temperature 33K
    • 2019/5/19(Sun)
      • Finesse of Yarm for IR: 146, ITMY temperature 25K, ETMY temperature 51K
    • 2019/5/20(Mon)
      • Finesse of Yarm for IR: 131, ITMY temperature 25K, ETMY temperature 60K
      • Finesse of Xarm for IR: 1151(probably due to the miscentering), ITMY temperature 29K, ETMY temperature 126K, but alignment at ETMX
  • Cryo status and plan
    • ETMY
      • 5/17~: tuned off ETMY cryostat cooler
      • 5/24PM~ inject 100Pa Nitrogen to increase temperature. It takes several days close to room temperature ?? degree.
      • 5/27 evacuation of Nitrogen.
    • ITMY
      • 5/23AM~: tuned off cryostat cooler, finesse measurement for Yarm
    • ITMX
      • 5/22AM~: tuned off cryostat cooler, finesse measurement for Xarm
  • Chance for Y arm finesse measurement: 5/21, 5/23 and after 5/29 of evacuation of Nitrogen
    • Searching good spot on Yarm

KAGRA/Commissioning/Weekly/20190521/Agenda (last edited 2019-05-21 16:46:38 by OsamuMiyakawa)