Contents
Agenda/Minutes on 2021/2/19
CRY+VIS Interface Meeting
13:30-14:10
Participants: Takahashi, Miyo, Aso, Sato, Hirata, Ikeda, Ushiba, Tomaru
- Schedule for IX: Released on 2/18. BF was overload.
- Schedule for IY: Disconnection is scheduled on 3/11.
- Schedule for EX: Connection is scheduled in the week of 3/15.
- Corrugate tube fixing jig: Re-measurement is planed in 2/26-3/1 at IYV.
- Commissioning in air: Commissioning of IX will be started. Other schedule has not been decided yet.
- 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: Assembling.
- Overall commissioning: To be considered about personnel.
VIS Meeting
14:00-15:00
Participants: Takahashi, Miyo, Aso, Sato, Hirata, Ikeda, Ishizaki, Sugiyama, Terrence, Fabian, Tanaka
Progress report
Schedule
General
General
Summary:
- [Ikeda] Investigation of the cable length for network cable and temperature control in center are was done. Investigation for both end station was not. [1,2]
- [Miyo] Automation script to make the foton files was made[3]. In this week I reproduce the OSEMINF foton file for all Type-Bp suspension by suing the script. This script will help us to avoid human error.
klog:
15737 We investigated the network connection. , satoru.ikeda
16028 Comment, satoru.ikeda
16036 Cabling for temperature control equipment , satoru.ikeda
16038 Initialize the OSEMINF filters for all Type-Bp suspensions , kouseki.miyo
16040 Comment, kouseki.miyo
Type-C
MCF Summary:
16041 Recovery of IMC suspension , ryutaro.takahashi
16049 Comment, naohisa.satou
16041 Recovery of IMC suspension , ryutaro.takahashi
Type-A
EY Summary:
15993 Setup of F2 , ryutaro.takahashi
IX Summary:
16055 Setup of BF with the released cryo-payload , ryutaro.takahashi
Type-Bp
PR2
Summary: [Miyo] I connected the cables for PRM minirack because these had been disconnected from Fujimi-sangyo clean work.
- 16054 PR2 minirack is moved to 2nd floor , kouseki.miyo
PR3 Summary:
Type-Bp
- After the release of the jammed picomotor, Ikeda-san moved back the sliding mass but he was unable to recover the same orientation of the IM according to the OSEMs. Pitch and were ended up with different values.
- The transfer functions showed an unhealthy system.
- Before doing visual inspection of the IM I moved IM-Y to zero from 1.78 mrad. However, while opening the chamber (cloth covers) it moved to about -500 urad. Moreover, during subsequent work it went to -2.3 mrad and it's been stable there.
- A few OSEM flags seem to be touching the OSEM bodies. Their positions are consistent with the large amount of yaw measured.
- About cables:
- Cables from the IM touch cables from the IM. (Lilkely not good but not too bad.)
- Cables from the IRM touch cables from the IRM. (Lilkely not good but not too bad.)
- A cable from the BF is touching the BF Damper.
- A cable from the BF Damper is touching the security structure before it's clamping point on the security structure.
- We provided more slack to those cables by improvising a additional clamping point on the securuty structure. This might have improved the situation of H1 OSEM flag but it did not solve the overall problem.
- There are some cables which are dangerously close to touching other cables.
- Today we assesed again the position of the OSEM flags.
- What do do?
- Maybe we should move the BF picomotor again.
- Adjust the tilt of BF by putting temporary ballast masses (in places yet to be decided) to see if the IM is released.
- Move OSEM panels?
15889 Traverser motor test and cabling. , fabian.arellano
16027 Comment, satoru.ikeda
15976 Picomotor of PR3_BF_T(Motor2) got stuck , satoru.ikeda
PRM Summary:
16048 Operation check of Picomotor of PRM IM and BF , satoru.ikeda
Type-B
SR3 Summary:
15963 IM ballast mass adjustment , fabian.arellano
16009 Comment, fabian.arellano
16007 Ballast mass adjustment on top of BF , fabian.arellano
Electronics (Tanaka)
- New combiner circuit was delivered to Kamioka. It should be evaluated at the site.
Control (Miyo)
Towards O4
- Type-B/Bp remedy work is on going.
- Installation of Type-A is on going in EY.
- Schedule.
- Procedure documents.
- Criteria in the acceptance test.
Safety
Discussion
- When will we do the recovering work for type-Bp suspensions?: Type-B team can go back to Type-Bp suspension after the work in EX.
- Cabling style of the thermisteos is reviewed by SEO?: Ask Miyoki-san.
Travel Plans
The week from 2/22
- Takahashi: 2/23-2/28
- Sato: 2/23-26
- Hirata: 2/23-26
- Yano: 2/23-26
The week from 3/1
- Takahashi: 3/1-5
- Sato: 3/1-5
- Hirata: 3/1-5
- Yano: 3/1-5
Next meeting
- On 2020/2/26(Fri)