Agenda/Minutes of the VIS Meeting on 2020/9/18
2020/9/18 13:30 -
Participants:
Interface between VIS and CRY
- Interface meeting was set to discuss about the integrated CAD model, the link between Cryo-payload and Type-A tower, the schedule, and so on. Mainly in Japanese for the engineers.
- VIS team plan to test the ribbon heater on the cross tube in IX or IY just before the vent of chambers.
Acceptance Test (Wiki page, Inspection document style).
Progress report
General
Type-A
Type B
- Preparation work with suspensions:
In BS, SR2 and SRM GAS filters I offloaded coil-maget actuation onto fishing rods (klog 15027, 15039, 15042).
In BS F1 I was able to move the keystone down to 230 um. Before the lowest the FR would allow was 488 um. I changed the setpoint accordingly and together with Miyo-kun I updated BURT and SDF files (klog 15027).
The temperature was relatively high at the moment (klog 15040). I told Moyoki-san and he installed coolers (klog 15043). The temperature has been dropping since then (klog 15052).
- I'll offload again once the DC actuation in GAS filters stops drifting.
- I'll measure IP resonant frequencies again.
- I told Takahashi-san about the yokes in BS IP coil-magnet actuators. They require cleaning and nickel coating.
- I went to the tunnel with Miyo-kun and cheked the holders for the gauge dials. We'll need to but longer rods. I'll let Takahashi-san know.
- Highlight in documentation:
Shoda-san, Takahashi-san, Hirata-san and Miyo-kun gave me feedback about the document. Thank you very much!
- An overall BS procedure is now readable.
- Hirata-san checked the section about the Lower Breadboard (LBB) and provided a picture for SR3 section.
- I added a secton on how to set the fishing rods to mid-range position.
- During installation we measured the total range of the motor in number of steps.
- For the FRs that are at the end of their ranges we just have to move them by half of the total range.
- I added a section about monitoring the IPs during venting. I got feedback and updated the document.
Type-Bp
Type-C
Controls
Electronics
Towards O4
- KAGRA is in "RSE Trial" now.
- Procedure documents.
- Preparation work.
- The preparation work will be started on Oct. 1st.
When you make inventories, indicate the segment name.
- Schedule towards O4.
cf. Post Obs. task (Request), Task for O3c (Plan, Sheet), Task towards O4 (List)
Safety
Discussion
Travel Plans
The week from 9/28
- Takahashi: 9/30-10/2
- Sato: 9/30-10/2
- Hirata: 9/30-10/2
The week from 10/5
- Takahashi: 10/5-9
- Sato: 10/5-9
- Hirata: 10/5-9
Next meeting
- On 2020/9/25(Fri)