|
Size: 2763
Comment:
|
Size: 2944
Comment:
|
| Deletions are marked like this. | Additions are marked like this. |
| Line 7: | Line 7: |
| At Kamioka (Mark, Fabian, Enzo, Hirata-san): * Hirata-san and Mark reversed the support ring for the LBB damper to match the reversed suspension. * Hirata-san did a trial assembly of the magnet ring for the LLB damper and placed magnets on it with the template. * Hirata-san and Mark put the base pieces for the Cu ring in the chamber. However it turns out that the holes for attaching the joint pieces are incompletely threaded and we will have to run a tap through them. * We tested the geophones. At first one didn't work at all. This turned out to be a broken wire in one of the in-vacuum adapter cables. For the test we replaced the adapter with an old-style one (and removed the matching descrambler). A second geophone mostly works but saturates at a suspiciously low number of counts at the ADC (2000 instead of 20000). * We tested the PI horizontal LVDTs. The #1 (H2) one works but cable swaps showed that #0 and #2 have issues both at the tank end and at the card. * We decided on a final location for the stepper and pico drivers on the second floor. We moved the cables for the stepper drivers (using the outside cable trays) and laid new LAN and AC cables for the picos. * We recounted the used and spare cables now that the in-vacuum cabling appears to be final. |
At Kamioka (Mark, Ohishi-san, Fabian, Enzo, Hirata-san, Yoshioka-kun): * We moved all the in-air cables over to the tank. * We plugged all the in-air and in-vacuum cables into the feedthroughs and checked that we got signals from all the output channels (actuation not yet tested). We had to work around a snag with the new F-F gender changers that replace many Type 1 and Type 2 cables: like the vacuum feedthroughs, they flip pins 1 and 5. The in-air cables don't plug directly into the feedthroughs very well, so we made up some non-flipping adapters similar to the anti-feedthrough adapters. * Hirata-san fixed a problem with one of the rods supporting the LBB Cu ring, where the head was not seating in the receptacle at the bottom. The head was slightly bent so he just reinstalled the rod upside-down to move the bent head to a less critical spot. (This also establishes that it's possible to install the rods later if we need to, although it's more convenient to bring them in with the suspension on the crane as we've been doing it.) * We suspended the LBB. Per a request from Akutsu-san, we set it as high as we easily could. We decided on 30 mm higher than in the CAD, for a height of 367 (instead of 397) mm for the beam line above the LBB. * We moved a lot of stuff out of the +X side of the cleanbooth to behind SRM, so that Mirapro could connect the section of beam duct between the BS tank and the X arm. They put the new section in position but have not connected it up yet. * Hirata-san worked with Mirapro to get the SR assembly frame assembled in the SR3 area. (Insertion of the LBB and installation of the top of the tank is planned for 10/18-20.) * We investigated a problem with the IM OSEM readings, which were far from mid-range. Although Fabian and Ohishi-san got the payload hanging nicely on Thu 9/21, sometime between then and when we plugged the OSEMs back in on 9/28, the BF and IRM apparently tipped considerably (with the +X corner high) so that the H2 and H3 OSEM flags are fouling on the bottom and top of their respective OSEMs. * [To be continued. Do our intrepid investigators fix the problem without having to crane the suspension out of the tank again? Stay tuned for the next exciting installment!] |
| Line 16: | Line 17: |
| ==== Plan for coming weeks ==== For more detail, see [[KAGRA/Subgroups/VIS/TypeB/ToDo]]. |
==== Plan for week of 10/2 ==== Kamioka: Mark, Enzo (Tue-Fri), Fabian, Ohishi-san. * Finish preparation for SR2 work. * '''Fix BF/IRM tilt issue!!!''' * Debug electronics, especially actuation. * Tune IP, do LVDT/stepper calibration. * Remove First Contact, try OL. |
| Line 19: | Line 25: |
| Week of 6/12: * Cabling: * Debug/fix PI vertical LVDTs #0 and #2. * Calibrate PI vertical LVDT. * Debug/fix geophone #1. * Set yoke on PI vertical LVDT (if necessary). * Cable and test PI yaw stepper. * Cable and test PI vertical stepper. * Cable and test PI horizontal steppers. * Cable and test PI horizontal LVDTs. * Calibrate PI horizontal LVDTs. * Prepare LBB. * Attach LBB outriggers and rod receptacles. * Prepare LBB Cu ring. * Remove from tank, fix incompletely threaded holes, reinstall in tank. * Lay down spacers to protect magnets (in next step). * Prepare LBB magnet ring. * Disassemble. * Pass pieces into tank. * Reassemble on top of Cu ring. * Install LBB damper. * Bind LBB damper rings together with slings. * Remove vacuum tank lid and ring. * Crane rings up to install height, hook LBB magnet ring and support LBB Cu ring by TBD method. * Crane suspension into tank. * Hook LBB Cu ring. * Hook LBB. * Crane vacuum tank lid+ring black on. * Remove vacuum tank lid (only). * Remove port covers where feedthroughs will go, move feedthroughs from assembly frame and install on vacuum tank ring. * Reconnect in-air cables. |
==== Plan for week of 10/10 ==== Holiday Mon 10/9, Open Day prep Fri 10/13.<<BR>> * Final preparation for alignment in week of 10/16. ==== Plan for week of 10/16 ==== * Work with alignment team. ==== Vacation Info ==== Mark: 10/16-24 |
Scraps of text for incorporation in the VIS Meeting Minutes
KAGRA/Subgroups/VIS/MeetingNAOJ
Type B (Mark)
Past week report
At Kamioka (Mark, Ohishi-san, Fabian, Enzo, Hirata-san, Yoshioka-kun):
- We moved all the in-air cables over to the tank.
- We plugged all the in-air and in-vacuum cables into the feedthroughs and checked that we got signals from all the output channels (actuation not yet tested). We had to work around a snag with the new F-F gender changers that replace many Type 1 and Type 2 cables: like the vacuum feedthroughs, they flip pins 1 and 5. The in-air cables don't plug directly into the feedthroughs very well, so we made up some non-flipping adapters similar to the anti-feedthrough adapters.
- Hirata-san fixed a problem with one of the rods supporting the LBB Cu ring, where the head was not seating in the receptacle at the bottom. The head was slightly bent so he just reinstalled the rod upside-down to move the bent head to a less critical spot. (This also establishes that it's possible to install the rods later if we need to, although it's more convenient to bring them in with the suspension on the crane as we've been doing it.)
- We suspended the LBB. Per a request from Akutsu-san, we set it as high as we easily could. We decided on 30 mm higher than in the CAD, for a height of 367 (instead of 397) mm for the beam line above the LBB.
- We moved a lot of stuff out of the +X side of the cleanbooth to behind SRM, so that Mirapro could connect the section of beam duct between the BS tank and the X arm. They put the new section in position but have not connected it up yet.
- Hirata-san worked with Mirapro to get the SR assembly frame assembled in the SR3 area. (Insertion of the LBB and installation of the top of the tank is planned for 10/18-20.)
- We investigated a problem with the IM OSEM readings, which were far from mid-range. Although Fabian and Ohishi-san got the payload hanging nicely on Thu 9/21, sometime between then and when we plugged the OSEMs back in on 9/28, the BF and IRM apparently tipped considerably (with the +X corner high) so that the H2 and H3 OSEM flags are fouling on the bottom and top of their respective OSEMs.
- [To be continued. Do our intrepid investigators fix the problem without having to crane the suspension out of the tank again? Stay tuned for the next exciting installment!]
Plan for week of 10/2
Kamioka: Mark, Enzo (Tue-Fri), Fabian, Ohishi-san.
- Finish preparation for SR2 work.
Fix BF/IRM tilt issue!!!
- Debug electronics, especially actuation.
- Tune IP, do LVDT/stepper calibration.
- Remove First Contact, try OL.
Plan for week of 10/10
Holiday Mon 10/9, Open Day prep Fri 10/13.
- Final preparation for alignment in week of 10/16.
Plan for week of 10/16
- Work with alignment team.
Vacation Info
Mark: 10/16-24