Contents
Agenda/Minutes
CRY+VIS Interface Meeting
Date : 13:30-
Participants : Takahashi, Ikeda, Ohashi, Kimura, Aso, Hirata, Sato, Ushiba, Tomaru, Akutsu, Miyo
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
* 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
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
16185 Added MN/PF OpLev to k1visitmxp's Model file. , 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
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
- 16239 Test of PR3 mirror pitch stability using the Donald Trump method. , 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.
- [Takahashi] The pushing point for yaw picomotor will be extended with spacer in MCo.
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)