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Editor: RyutaroTakahashi
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Deletions are marked like this. Additions are marked like this.
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Participants: Participants: Takahashi, Sato, Barton, Tapia, Hirata, Kozu, Terrence, Ohishi, Tanioka, Tanaka, Fujii, Okutomi, Shoda, Ishizaki, Tanak(ICRR)
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    [Y-front]
  * Mounted the BF onto the EQ stop. The DP was suspended from the BF.
  * Tuned the BF. Compressed the all five blades. The tuned frequency was 0.24Hz at 198kg.
  * Modified the FR for BF. The fixing point of blade was changed. The FR can cover the full range of keystone.
  * Calibrated the LVDT for BF.
  * Made the short cables for BF damper.
  * Assembled the end plate for F3.
  * Extended the EQ stop to the F3 stage. Attached the support plate for the BF damper.
  * Assembled the FR for F3 with the new blades.
  * Assembled the connector plates for F3. Attached them to the cup.
  * Cabled for the LVDT-Actuator and the stepping motor for F3.
  * Measured the weight of F3. It was 82.9kg.
  * Mounted the F3 onto the EQ stop. The BF was suspended from the F3.
  * Cabled between the BF and the F3.
  * Tuned the F3. The tuned frequency was 0.31Hz with the additional load of 6kg.
  * Checked the range of FR for BF. The FR can cover the full range of keystone.

[X-front]
  * Set up the analog drivers in the rack.
  * Checked the dimension of distance between the beam axis and the cross tube.
Line 18: Line 40:
  * Calibrate the LVDT for F3.
  * Go to the F2 stage.
  * Tune the TF in X-front.
Line 20: Line 45:
==== Past week report ====
==== Plan for coming weeks ====		 ==== Report for week of 6/11 ====
 * Mark fixed some channels displaying white on the BS MEDM screens due to issues from splitting the model.
 * Enzo redid the SR3 BIO connections to match the now-working BS setup. He also fixed PR2, which had a similar problem.
 * Enzo replaced LPCDs with HPCDs in the SR3.
 * Hirata-san installed the cable clamps and Cu segments on the SF cap.
 * Hirata-san and Kozu-kun continued tuning the filter in PI #3. Unfortunately it seems to be rather weaker than expected, and we have not found a compression setting that gives a good frequency. We may have to use tricks like reducing the number of Cu segments on the SF (or using Al ones) to save weight.
 * Mark, Enzo and Terrence suspended the BF/... section from the SF, routed all the cables from the BF/... stages up around the BF, via the SF-BF margin rod to the bottom of the SF, and got the hanging section aligned for TFs.
 * Enzo cabled and tested the SF LVDT (but not yet the SF FR).
 * Mark and Enzo released an update to the BS Circuit Diagram D1503600-v15 with corrections to the BIO and other sections.

==== Plan for week of 6/18 ====
 * Mark, Enzo, Hirata-san, Kozu-kun, Terrence at Kamioka Mon-Fri.
 * --
 * Receive second and third sets of LBB damper rings.
 * Take TFs.
 * Cable, test SF LVDT and FR.
 * Add calculated ballast to SF.
 * Finish tuning F0 #3 for SR3.
 * Park F0 #1 (for SR2) in top of SR3 assembly frame.
 * Move F0 #3 behind SR3.
 * Move F0 #1 to "factory" area (in front of SRM) and start rebuild.
 * Install PI.
 * Suspend SF/... section.
 * Lots of cabling.

==== Plan for week of 6/25 ====
 * Mark, Enzo, Hirata-san, Kozu-kun, Terrence at Kamioka Mon-Fri.

==== To-Do Lists, Schedule ====
 * [[KAGRA/Subgroups/VIS/TypeB/ToDoBS]]
 * [[KAGRA/Subgroups/VIS/TypeB/ToDoSR]]
 * [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=7779|JGW-L1807779 Type B Schedule (SR)]]

==== Vacation Info ====
Line 25: Line 82:
 * Worked on Oplev diagonalization for PR2 and PR3.
 * Coil balance of PR2 optic was adjusted
 * PR3 IM and BF sensor matrices were also diagonalized.
 * Working on decay time (w/ damping) measurement on PR3.
Line 29: Line 90:

 * Thanks to Tanioka-san and Nagano-san (NICT), we have finished parts replacement of IMMT1.
 * We have replaced stainless screws in the intermediate mass with non-magnetic screws.
 * Measured transfer functions of length, pitch, and yaw and found no problem.
Line 30: Line 96:

 * Order some parts of OMMT.
Line 36: Line 104:
  * Power line replacement is planed on 26th June.
Line 41: Line 110:
  * Type-A:
  * Type-B:		   * Type-A: Crane work.
  * Type-B: Crane work.
Line 46: Line 115:
  * Commissioning of X-arm in autum.

The commissioning team is requiring the lift up of both ITMX and ETMX by ~ 10 mm.
It is difficult to lift up the ETMX by the FR more than several mm due to the bistable problem in the F2.

  * Tuning of TF for SR3.

Optimal point lower than 0.3Hz was not found in the compression of 18~30mm. The lowest frequency was 0.4Hz at 245kg. Try to find a point higher than 0.5Hz at the load larger than 255kg again.
Line 49: Line 126:
  * Takahashi:
  * Okutomi:
  * Sato:		   * Takahashi: 18-22
  * Okutomi: 18-22
  * Sato: 18-22
Line 53: Line 130:
  * Mark:
  * Hirata:
  * Enzo:		   * Mark: 18-22
  * Hirata: 18-22
  * Enzo: 18-22
Line 61: Line 138:
  * Kozu (ICRR):   * Kozu (ICRR): 18-22
Line 63: Line 140:
  * Terrence:   * Terrence: 18-22
Line 67: Line 144:
  * Takahashi:   * Takahashi: 25-29
Line 69: Line 146:
  * Sato:   * Sato: 25-29
Line 71: Line 148:
  * Mark:
  * Hirata:
  * Enzo: 		  * Mark: 25-29
  * Hirata: 25-29
  * Enzo: 25-29
Line 76: Line 153:
  * Fujii:   * Fujii: 25-29
Line 79: Line 156:
  * Kozu (ICRR):   * Kozu (ICRR): 25-29
Line 81: Line 158:
  * Terrence:   * Terrence: 25-29

Agenda/Minutes of the VIS Meeting on 2018/6/15

2018/6/15 13:30 -

Zoom Meeting

Participants: Takahashi, Sato, Barton, Tapia, Hirata, Kozu, Terrence, Ohishi, Tanioka, Tanaka, Fujii, Okutomi, Shoda, Ishizaki, Tanak(ICRR)

Progress report

Schedule Chart

Type-A : (PDF/MPP)

Type-B: (PDF/MPP)

Type-A (Takahashi)

Past week report

[Y-front]

  • Mounted the BF onto the EQ stop. The DP was suspended from the BF.
  • Tuned the BF. Compressed the all five blades. The tuned frequency was 0.24Hz at 198kg.
  • Modified the FR for BF. The fixing point of blade was changed. The FR can cover the full range of keystone.
  • Calibrated the LVDT for BF.
  • Made the short cables for BF damper.
  • Assembled the end plate for F3.
  • Extended the EQ stop to the F3 stage. Attached the support plate for the BF damper.
  • Assembled the FR for F3 with the new blades.
  • Assembled the connector plates for F3. Attached them to the cup.
  • Cabled for the LVDT-Actuator and the stepping motor for F3.
  • Measured the weight of F3. It was 82.9kg.
  • Mounted the F3 onto the EQ stop. The BF was suspended from the F3.
  • Cabled between the BF and the F3.
  • Tuned the F3. The tuned frequency was 0.31Hz with the additional load of 6kg.
  • Checked the range of FR for BF. The FR can cover the full range of keystone.

[X-front]

  • Set up the analog drivers in the rack.
  • Checked the dimension of distance between the beam axis and the cross tube.

Plan for coming weeks

  • Calibrate the LVDT for F3.
  • Go to the F2 stage.
  • Tune the TF in X-front.

Type B (Mark)

Report for week of 6/11

  • Mark fixed some channels displaying white on the BS MEDM screens due to issues from splitting the model.
  • Enzo redid the SR3 BIO connections to match the now-working BS setup. He also fixed PR2, which had a similar problem.
  • Enzo replaced LPCDs with HPCDs in the SR3.
  • Hirata-san installed the cable clamps and Cu segments on the SF cap.
  • Hirata-san and Kozu-kun continued tuning the filter in PI #3. Unfortunately it seems to be rather weaker than expected, and we have not found a compression setting that gives a good frequency. We may have to use tricks like reducing the number of Cu segments on the SF (or using Al ones) to save weight.
  • Mark, Enzo and Terrence suspended the BF/... section from the SF, routed all the cables from the BF/... stages up around the BF, via the SF-BF margin rod to the bottom of the SF, and got the hanging section aligned for TFs.
  • Enzo cabled and tested the SF LVDT (but not yet the SF FR).
  • Mark and Enzo released an update to the BS Circuit Diagram D1503600-v15 with corrections to the BIO and other sections.

Plan for week of 6/18

  • Mark, Enzo, Hirata-san, Kozu-kun, Terrence at Kamioka Mon-Fri.
  • --
  • Receive second and third sets of LBB damper rings.
  • Take TFs.
  • Cable, test SF LVDT and FR.
  • Add calculated ballast to SF.
  • Finish tuning F0 #3 for SR3.
  • Park F0 #1 (for SR2) in top of SR3 assembly frame.
  • Move F0 #3 behind SR3.
  • Move F0 #1 to "factory" area (in front of SRM) and start rebuild.
  • Install PI.
  • Suspend SF/... section.
  • Lots of cabling.

Plan for week of 6/25

  • Mark, Enzo, Hirata-san, Kozu-kun, Terrence at Kamioka Mon-Fri.

To-Do Lists, Schedule

Vacation Info

Type-Bp (Shoda)

Past week report

  • Worked on Oplev diagonalization for PR2 and PR3.
  • Coil balance of PR2 optic was adjusted
  • PR3 IM and BF sensor matrices were also diagonalized.
  • Working on decay time (w/ damping) measurement on PR3.

Plan for coming weeks

OMMT & OSTM (Ohishi)

Past week report

  • Thanks to Tanioka-san and Nagano-san (NICT), we have finished parts replacement of IMMT1.
  • We have replaced stainless screws in the intermediate mass with non-magnetic screws.
  • Measured transfer functions of length, pitch, and yaw and found no problem.

Plan for coming weeks

  • Order some parts of OMMT.

LVDT Driver (Tanaka)

Past week report

Plan for coming weeks

Other site works

  • Power line replacement is planed on 26th June.

Safety

  • Incidents:
  • Foreseen risks
    • Type-A: Crane work.
    • Type-B: Crane work.
    • Type-Bp:

Discussion

  • Commissioning of X-arm in autum.

The commissioning team is requiring the lift up of both ITMX and ETMX by ~ 10 mm. It is difficult to lift up the ETMX by the FR more than several mm due to the bistable problem in the F2.

  • Tuning of TF for SR3.

Optimal point lower than 0.3Hz was not found in the compression of 18~30mm. The lowest frequency was 0.4Hz at 245kg. Try to find a point higher than 0.5Hz at the load larger than 255kg again.

Travel Plans

  • Travel (Week of 6/18):
    • Takahashi: 18-22
    • Okutomi: 18-22
    • Sato: 18-22
    • Ishizaki:
    • Mark: 18-22
    • Hirata: 18-22
    • Enzo: 18-22
    • Shoda:
    • Ohishi:
    • Fujii:
    • Tanioka:
    • Tanaka:
    • Kozu (ICRR): 18-22
    • Arai (ICRR):
    • Terrence: 18-22
  • Travel (Week of 6/25):
    • Takahashi: 25-29
    • Okutomi:
    • Sato: 25-29
    • Ishizaki:
    • Mark: 25-29
    • Hirata: 25-29
    • Enzo: 25-29
    • Shoda:
    • Ohishi:
    • Fujii: 25-29
    • Tanioka:
    • Tanaka:
    • Kozu (ICRR): 25-29
    • Arai (ICRR):
    • Terrence: 25-29

Next meeting

On 2018/6/22(Fri)

KAGRA/Subgroups/VIS/VISMinutes20180615 (last edited 2018-06-15 17:27:17 by RyutaroTakahashi)