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Size: 2573
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Size: 1817
Comment:
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| Deletions are marked like this. | Additions are marked like this. |
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| ==== Past week report ==== At Kamioka (Mark, Fabian, Enzo, Perry, Hirata-san): |
==== Report for week of 1/15 ==== * We set up the QPD for the OL, initialized the OL and TM sections of the RTM, and did TFs from the TM OSEMs to the OL. * Initially we had no coherence, but we debugged issues with the watchdog, LPCD, and DAC board and then got good TFs. * We lifted the IM/RM/SR with the load gauge adapter and checked the weight, which was close to the mass budget. * We installed the section of the AF above the IM, and the BF cross bars and jacks, and craned in the BF. * We installed the BF-IRM rods, IRM, BF-IM rod, flying saucer and the cable clamps on the bottom of the BF. * We hooked the IM section, but found it was heavy by several hundred grams. We also noticed the BF keystone had a noticeable tilt of about 1.2 mm (high on the +X side). * We removed 738 g of trim mass and found that load rose and sat about 2 mm high. So the discrepancy is of order 500-600 g. * Shoda-san, Enzo and Kozu-kun made and characterized a batch of OSEMs. * Hirata-san finished drawings for the improved BS PI yaw/vertical adjustment, placed orders for damping ring receptacles and other items, and prepared the second SR BF in case we needed to swap it in. ==== Plan for week of 1/22 ==== * Fix or swap BF. * Route selected cables to flange. * Test IM picos and BF yaw pico. |
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| * We removed the PI from the assembly frame. * We encountered a problem with the PI-SF rod jamming in the SF. We finally got it out by clamping a pig of vice grips to the rod and hammering. We found that the receptacle part was the right size (7.0 mm) but had been deformed around the edge. Hirata-san used a knife and sandpaper to lean up the edge and then ultrasonically cleaned it. * We cleared space for the PR2 team to remove a bellows from their tank. * We installed safety bars near the assembly frame at about waist height for someone on the tall ladder. We reinforced the clamps with cable ties. * We removed the LLB blade units from the PI, removed the blades from the clamps and sent the blades away for more rework to fix the length problem. Fortunately the tab section at the tip is fairly long, so we can just add a second hole further from the end. * We removed the SF cap and stored it on crossbars within the assembly frame. * We tested the SR fishing rod again, but it would only go up, not down. We found that reseting the driver fixed it, but we also moved the driver boxes into the cleanbooth to reduce the length of the motor cables. (Instead, we had to run some long DC and LAN cables.) * We adjusted the limit nut on the SF fishing rod to increase the range. * We removed one segment of the Cu ring on the SF cap and reconfigured the rest to be symmetrical. * Fabian designed a layout for the SF damper ring magnets that would work with the modified Cu ring, and placed the magnets with the template. The poles of the magnets were not on the expected faces so we had to stand the magnets up with the , |
==== Plan for week of 1/29 ==== * Enzo at Mitaka 1/29 and most of 1/30, then vacation. * Kozu-kun away. * All others at Kamioka. * Build IRM around IM. * Cable/test/adjust IM OSEMs. * Time permitting, do TFs from IM OSEMs to themselves and to optical sensor. |
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==== Plan for coming weeks ==== For more detail, see [[KAGRA/Subgroups/VIS/TypeB/ToDo]]. Week of 5/15: * Enzo from Tuesday 5/16 (driving test), rest of team from Monday. * Fix PI-SF rod jamming. * Remove PI and SF cap. * Continue debugging SF LVDT. * Reconfigure Cu damper ring on SF. * Add magnets to upper SF damper ring. * Add cable clamps on the PI (a few places are inaccessible when the PI is on the assembly frame). * Reinstall PI, this time with rods and damper ring. * Reinstall PI-SF rod, this time with hex cable clamp. * Prepare for PR2 bellows removal on 5/15 (move table with tools). * Cable/test PI horizontal LVDTs and steppers. * Install/cable/test geophones. |
==== Vacation Info ==== * Enzo 1/30-2/19 (at Mitaka 1/29, part of 1/30) * Kozu-kun 1/29-2/2 |
Scraps of text for incorporation in the VIS Meeting Minutes
KAGRA/Subgroups/VIS/MeetingNAOJ
Type B (Mark)
Report for week of 1/15
- We set up the QPD for the OL, initialized the OL and TM sections of the RTM, and did TFs from the TM OSEMs to the OL.
- Initially we had no coherence, but we debugged issues with the watchdog, LPCD, and DAC board and then got good TFs.
- We lifted the IM/RM/SR with the load gauge adapter and checked the weight, which was close to the mass budget.
- We installed the section of the AF above the IM, and the BF cross bars and jacks, and craned in the BF.
- We installed the BF-IRM rods, IRM, BF-IM rod, flying saucer and the cable clamps on the bottom of the BF.
- We hooked the IM section, but found it was heavy by several hundred grams. We also noticed the BF keystone had a noticeable tilt of about 1.2 mm (high on the +X side).
- We removed 738 g of trim mass and found that load rose and sat about 2 mm high. So the discrepancy is of order 500-600 g.
- Shoda-san, Enzo and Kozu-kun made and characterized a batch of OSEMs.
- Hirata-san finished drawings for the improved BS PI yaw/vertical adjustment, placed orders for damping ring receptacles and other items, and prepared the second SR BF in case we needed to swap it in.
Plan for week of 1/22
- Fix or swap BF.
- Route selected cables to flange.
- Test IM picos and BF yaw pico.
Plan for week of 1/29
- Enzo at Mitaka 1/29 and most of 1/30, then vacation.
- Kozu-kun away.
- All others at Kamioka.
- Build IRM around IM.
- Cable/test/adjust IM OSEMs.
- Time permitting, do TFs from IM OSEMs to themselves and to optical sensor.
Vacation Info
- Enzo 1/30-2/19 (at Mitaka 1/29, part of 1/30)
- Kozu-kun 1/29-2/2