Agenda/Minutes

Zoom Meeting

CRY+VIS Interface Meeting

Date : 13:30-

Participants : Takahashi, Ikeda, Ohashi, Kimura, Aso, Hirata, Sato, Ushiba, Tomaru, Akutsu, Miyo

Post O3 Upgrade portal

Schedule

• IX: Oplev setting will be carried out after the next week. F0 and IP were tuned. Yaw will be adjusted after rough alignment.
• IY: Cryo-payload was removed on 3/11.
• EX: Connection is scheduled in the next week.
• EY: Cryo-payload was removed on 3/12. Cable treatment is necessary.

Status

• Corrugate tube fixing jig: The spacer is modified. They should be prepared by mid. May.
• Commissioning in air: From mid. May for IX.
• Commissioning in vacuum:
• Acceptance check: Cryo-payload in IX/EX and Type-A tower in EY/IX are on going.
• PF actuator: Not evaluated in IX, but after the commissioning for suspension.
• Jig for FC painting:
• Overall commissioning: Schedule meeting on 3/22.
• Procedure of TM height setting:

Discussion

VIS Meeting

14:00-

Participants: Takahashi, Fabian, Hirata, Miyo, Tanaka, Sato, Washimi, Terrence, Aso

Schedule

Schedule

* The next week

• Type-A team: 3/15-16 connection of cryo-payload in EX. 3/17- go back to EY
• Type-B team: 3/15-19 PR3 setting. Remedy work of IY will be postponed.

klog

EX

• 16183 Cleaning and transportation of components. , fabian.arellano

• 16142 IP and F0 stepper motor limit switches. , fabian.arellano

  • 16170 Comment , satoru.ikeda

  • 16178 Comment , fabian.arellano

General

• 16200 Recovery of the signal generators in Type-B and Type-Bp suspensions. , fabian.arellano

  • 16234 Common Type-C(MCI,MCE,MCO,IMMT1,IMMT2) model. , satoru.ikeda

IX

• 16185 Added MN/PF OpLev to k1visitmxp's Model file. , satoru.ikeda

• 16199 Setup of IP , ryutaro.takahashi

• 16118 Setup of filter chain , ryutaro.takahashi

  • 16171 Comment , ryutaro.takahashi

  • 16195 Comment , ryutaro.takahashi

• 16185 Added MN/PF OpLev to k1visitmxp's Model file. , satoru.ikeda

  • 16197 Comment , satoru.ikeda

  • 16216 Comment , satoru.ikeda

• 16199 Setup of IP , ryutaro.takahashi

  • 16238 Comment , ryutaro.takahashi

IY

• 16214 Preparation for disconnection of cryo-payload , ryutaro.takahashi

• 16217 Support for common Payload/Tower model files: Type-A (ITMY) is supported to TOWER_MASTER/PAYLOAD_MASTER. , satoru.ikeda

• 16249 Connection of release sensors to DGS , ryutaro.takahashi

• 16091 Monitoring of IP by ITMY venting , satoru.ikeda

  • 16248 Comment , satoru.ikeda

• 16214 Preparation for disconnection of cryo-payload , ryutaro.takahashi

  • 16237 Comment , ryutaro.takahashi

MCF

• 16242 MCi and MCo oplev TX replacing , tomotada.akutsu

• 16157 Investigation of IMC suspensions , ryutaro.takahashi

  • 16180 Comment , ryutaro.takahashi

  • 16181 Comment , takaaki.yokozawa

  • 16182 Comment , shinji.miyoki

  • 16198 Comment , kouseki.miyo

  • 16201 Comment , tomotada.akutsu

  • 16225 Comment , kouseki.miyo

PR3

• 16239 Test of PR3 mirror pitch stability using the Donald Trump method. , fabian.arellano

• 15976 Picomotor of PR3_BF_T(Motor2) got stuck , satoru.ikeda

  • 16204 Comment , fabian.arellano

  • 16207 Comment , fabian.arellano

  • 16223 Comment , fabian.arellano

  • 16228 Comment , fabian.arellano

• 16239 Test of PR3 mirror pitch stability using the Donald Trump method. , fabian.arellano

  • 16247 Comment , fabian.arellano

  • 16246 Comment , fabian.arellano

This is generated by python script in /users/Miyo/dropbox/Script/scrapping/main.py.

Summary Report

TypeA

• Disconnected the cryo-payload in IY.
• Setup the F0 and tuned the IP in IX.

TypeB

TypeBp

PR3

• At the begining of the week the IM was still touching the IRM.
• First we did a health check of the IM-Y picomotor because I had the impression it had reached a limit.
  • We locked the BF and pushed the IRM in yaw such that the IM was hanging free.
  • We actuated in yaw using the picomotor and it moved freely suggesting it had not reached its limit.
• With confidence in the picomotor condition we proceeded to adjust yaw and pitch until the IM became free although the OSEM flags were not at the centres of their cavities.
• Measurements of IM TFs revealed the system was healthy. (IM-V TF was not measured because the SF is locked due to the plastic cover.)

• Happily, we can consider the system to be recovered from the jammed-BF-picomotor-earthqueake event.

• Later we moved the IM picomotors in order to move the OSEM flags closer to centers of their cavities.However, this rendered H3 out of range.
• The locked theIRM and the IM and moved H3 into range, but when we released the system we realized V1 had become out of range due to a change in pitch.
• We measured transfer functions with the horizontal OSEMs and they were all good.
• We proceeded with the Trump method to test the pitch stability:

  • We carried out the procedure from the control room and used the readout from V2 and V3 (V1 out of range) and the 3D-CAD to calculate the change in pitch: -3.9 mrad (consistent with what was measured with an oplev when we disturbed the suspension when we glued the wire).

  • In the tunnel we carried out the procedure again and used an oplev to measure a change of 33.4 mrad. See the videos.

  • For the same event we used the V2 and V3 OSEMs to estimate the change in pitch of the IM: 4.1 mrad (consistent with previous measurements).

• Today we inspected the payload visually.
  • We didn't find anything wrong.
  • Only H2 flag rotated during the Trump procedure. See pictures.

TypeC

• [Miyo] We have to resolve the picomotor range probblem before closing MCE and MCF chambers.
• [Miyo] We will start the suspension commissioning work including the oplev calibration in next week.

Electronics

• [Takahashi] Connected the release sensors to the DGS using the exchange cables in IY.

Control

• [Ikeda] Add new RTM block of additional MN and PF OpLevs of Cryo-payload in the current RTM.

• [Ikeda] ITMY is updated with new RTM.

• [Ikeda] Now, the old RTM used in O3 is only installed on BS and PR3. Please see Wiki

Safety

Discussion

Travel Plans

The week from 3/15

• Takahashi: 3/15-18
• Sato: 3/15-19
• Hirata: 3/15-19
• Yano: 3/15-19

The week from 3/22

• Takahashi: 3/22-3/26
• Sato: 3/22-3/26
• Hirata: 3/22-3/26
• Yano: 3/22-3/26

Next meeting

• 2021/3/19(FRI)