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| ==== Report for week of 3/5 ==== * Mark finished -v2 of the schedule ([[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=7779| L1807779]]). * We removed the non-vacuum-compatible ballast mass from the BS tank. * We secured all the PR2 feedthrough connections with screws. * We grabbed an extra empty rack for SRM and set it up next to the one for SR3 (we will add boxes next week). * We calibrated the SR2 SF LVDT sensing and actuation, and the FR. * We measured the bounce frequencies of the SF with and without the cap, and the bounce frequency of the BF. * We put the SF cap on and lifted and weighed the SF/... section. * However we were unhappy with how the cap had to be forced on and off and how it lowered the load capacity (≈-433 g) and resonance frequency (0.271 Hz-> 0.23 Hz). * We tried the cap left over from B2-3 used in one of the PRs, which was slightly better but still not great. * We measured diameter of the original cap (B2-2) and the new one (B2-3). The original cap was almost exactly 700 mm in internal diameter, and the new one was about 0.2 mm wider. * We moved the filter building bench and tools into the SRM area and started the rebuild of the two remaining BFs (the one from the BS Test Hang and the one with the tilted keystone). * Mark worked on slides for the ASJ and LVC meetings. * The SRM mushroom work was postponed due to other demands on the time of Sawada-san-tachi and Mirapro. |
==== Report for week of 10/8 ==== * This was Panwei's last week (for now at least) - thanks for all the help! * Thanks also to Terrence for visiting again for the week. ===== SR3 ===== * Terrence and Mark finished setting up the LEN half of the OL (Simon had roughly placed the components). They ran a new cable for LEN in the cable tray and relaid the cable for TILT to get it off the floor. * Terrence worked on diagonalizing the LEN OL. A report is forthcoming. ===== SRM ===== * Mark installed a pair of power supplies in the SRM and copied settings across to the SRM real-time model. * Fabian did lots of rack cabling, including installing and connecting BIO cards. * Mark and Hirata-san checked and adjusted the pitch of the BF (with a bubble level) and the IM/... section (with the OL). * Mark and Panwei installed the sides of the IRM and the IM OSEMs. * Hirata-san hung the dummy load from the F0 and started compressing the blade. There was a significant lateral offset (≈2-3 mm towards the blade at 5:30) at first but Takahashi-san advised that it would probably improve with compression, and it did. * Mark and Hirata-san cleared off most of two optical tables and a set of shelves in the OMMT area that Type B had been using but were now required by Somiya-san and Ohishi-san. We still need to remove the geophone and OSEM testing setups. |
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| ==== Plan for week of 3/12 ==== * Shoda-san at Mitaka. * Mark at ASJ (Chiba) Fri, then Mitaka. * Others Kamioka Mon-Thu * F2F VIS Meeting and Farewell Party for Fabian at Mitaka on Friday. * -- * Install boxes in SR3 and SRM racks. * Lay SR3 in-air cabling. * Continue rebuild of BFs. * Ship dummy BS to Mitaka. |
===== SR2 ===== * Mark, Enzo and Hirata-san all inspected the lower section of the SR2 to see if there were any interference points that might explain some unexpected peaks in the TFs (especially the RM pitch made appearing in longitudinal) that weren't present before installation. There were no stops touching, but some TM OSEM cables were rubbing against each other, which we fixed. The problem turned out to be swapped cables in the coil actuation. * We removed the tank lid, and Enzo and Panwei inspected the cabling that had been done during Enzo's vacation and installed some new cables that had arrived. They also unlocked the IP. |
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| ==== Plan for week of 3/19 ==== * Fujii-kun and Tanioka-kun join. * Mark at LVC meeting * Fujii-kun at Kamioka * All others at Mitaka * -- * Put four geophones in pods. * Make two sets of IM OSEMs * Make last in-air pico adapter cable * Make three in-air stepper splitter cables for SR2, SR3 and SRM. * Set up Dummy BS prism removal. ==== Plan for week of 3/26 ==== * Mark vacation. * Shoda-san at Mitaka * Others at Kamioka * -- * SF Check * Check load capacity. * Check fit of caps. * Add cable clamps to bases. * Add cable clamps and Cu segments to caps (only if they fit well). * Cable LVDTs and steppers. |
==== Plan for week of 10/15 ==== * Mark, Enzo, Hirata-san and Fabian at Kamioka Mon-Fri. ===== SR2 ===== * Continue shakedown of PI section. ===== SRM ===== * Align IRM with IM. * Suspend/weigh/balance the BF/... section. * Build up the AF and SS to the SF level. * Install the SF. |
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| * [[KAGRA/Subgroups/VIS/TypeB/March2018]] * [[KAGRA/Subgroups/VIS/TypeB/April2018]] |
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| * [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=7779|JGW-L1807779-v1 Type B Schedule (SR)]] | * [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=7779|JGW-L1807779 Type B Schedule (SR)]] |
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| ==== Vacation Info ==== * Mark at LVC, then vacation, 3/18 (Sun) - 4/1 (Sun) * Hirata-san vacation, Mon 3/5. * Fabian vacation, 3/26-4/27 (then gone). |
==== Vacation/Visitor Info ==== * Terrence: 10/29-11/2 at Kamioka. |
Scraps of text for incorporation in the VIS Meeting Minutes
KAGRA/Subgroups/VIS/MeetingNAOJ
Type B (Mark)
Report for week of 10/8
- This was Panwei's last week (for now at least) - thanks for all the help!
- Thanks also to Terrence for visiting again for the week.
SR3
- Terrence and Mark finished setting up the LEN half of the OL (Simon had roughly placed the components). They ran a new cable for LEN in the cable tray and relaid the cable for TILT to get it off the floor.
- Terrence worked on diagonalizing the LEN OL. A report is forthcoming.
SRM
- Mark installed a pair of power supplies in the SRM and copied settings across to the SRM real-time model.
- Fabian did lots of rack cabling, including installing and connecting BIO cards.
- Mark and Hirata-san checked and adjusted the pitch of the BF (with a bubble level) and the IM/... section (with the OL).
- Mark and Panwei installed the sides of the IRM and the IM OSEMs.
- Hirata-san hung the dummy load from the F0 and started compressing the blade. There was a significant lateral offset (≈2-3 mm towards the blade at 5:30) at first but Takahashi-san advised that it would probably improve with compression, and it did.
- Mark and Hirata-san cleared off most of two optical tables and a set of shelves in the OMMT area that Type B had been using but were now required by Somiya-san and Ohishi-san. We still need to remove the geophone and OSEM testing setups.
SR2
- Mark, Enzo and Hirata-san all inspected the lower section of the SR2 to see if there were any interference points that might explain some unexpected peaks in the TFs (especially the RM pitch made appearing in longitudinal) that weren't present before installation. There were no stops touching, but some TM OSEM cables were rubbing against each other, which we fixed. The problem turned out to be swapped cables in the coil actuation.
- We removed the tank lid, and Enzo and Panwei inspected the cabling that had been done during Enzo's vacation and installed some new cables that had arrived. They also unlocked the IP.
Plan for week of 10/15
- Mark, Enzo, Hirata-san and Fabian at Kamioka Mon-Fri.
SR2
- Continue shakedown of PI section.
SRM
- Align IRM with IM.
- Suspend/weigh/balance the BF/... section.
- Build up the AF and SS to the SF level.
- Install the SF.
To-Do Lists, Schedule
Vacation/Visitor Info
- Terrence: 10/29-11/2 at Kamioka.