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| ==== Past week report ==== At Kamioka (Mark, Fabian, Enzo, Hirata-san): * We improvised a solution for ballast mass on the BF, using some heavy dog clamps meant for pedestals, washed and wrapped in foil. We we use them for the duration of the BS Test Hang and then swap them out for custom masses. * We rearranged the BS rack, closing the gaps between boxes (per request of Miyakawa-san. We also renumbered some boxes, connectors and cables so as to use zero-based numbering (#0, #1, #2,...) throughout. * We routed the OSEM cables into the external cable rack (rather than through the PR2 area). * We connected up the BF LVDT, and BF fishing rod stepper motor. * We installed a signal generator for the LVDT. * We connected the super motor driver box to the Internet and attempted to set it up, but with no success so far. * We found the final picomotor driver (we have been using the one from TAMA in the clean booth). * We found many items that we will need soon, including the copper ring for the SF. * We found issues with the digital system (the computer driving the rack had been changed from k1pr2 to k1bs, which causes problems) and worked with DGS to fix them. It now mostly works but the real-time model crashes from time to time. |
==== Report for week of 1/15 ==== * We swapped in the other available BF, and it was rather better: only 0.3 mm of keystone tilt rather than 1.3 mm. We will use it for the SR2 and then think about whether we want to use or rebuild the original one. * We finished the preparation of the second BF, setting the yoke, adding the new-style cable clamps etc. * We changed the 1.6 mm sockets on the BF LVDT cable to 1.0 mm ones to match the pins on the LVDT wires. The specification of the cable in D1503901 was apparently wrong. We will update it (today) before doing the cable order for the SR3 and SRM. * We updated the BS real-time model and screens, adding support for a damping filter common to both the OL-TM and OL-IM paths, per Izumi-san's suggestion in G1807653. * We set up the router for the SR2 rack and got the SR2_IM pico driver and both stepper motors on the network (the SR2_BF pico is still on order). * We did prep for the top filter test: * We received, unpacked and temporarily stored a shipment of weights and other parts. * We removed the top crossbars from the SR3 assembly frame. |
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| ==== Plan for coming weeks ==== * Everyone (Mark, Fabian, Enzo, Hirata-san) next week at Kamioka |
==== 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. * Make in-air pico adapter cables. * Test IM picos and BF yaw pico. * Test FR. * Calibrate LVDT. * Get screws for ballast mass from Takahashi-san. * Install ballast mass in BF. * Set up for F0 test. * Lower IM crossbars in SR3 assembly frame. * Open curtain on SR3 crane slot. * Set up dummy load (weight carrier, rods etc). * Do F0 test. * Bring in F0. * Hook up dummy load. * Adjust dummy load. ==== Plan for week of 2/5 ==== * Enzo on vacation; 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. ==== Plan for week of 2/12 ==== * Enzo on vacation; all others at Kamioka. ==== 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 swapped in the other available BF, and it was rather better: only 0.3 mm of keystone tilt rather than 1.3 mm. We will use it for the SR2 and then think about whether we want to use or rebuild the original one.
- We finished the preparation of the second BF, setting the yoke, adding the new-style cable clamps etc.
- We changed the 1.6 mm sockets on the BF LVDT cable to 1.0 mm ones to match the pins on the LVDT wires. The specification of the cable in D1503901 was apparently wrong. We will update it (today) before doing the cable order for the SR3 and SRM.
- We updated the BS real-time model and screens, adding support for a damping filter common to both the OL-TM and OL-IM paths, per Izumi-san's suggestion in G1807653.
- We set up the router for the SR2 rack and got the SR2_IM pico driver and both stepper motors on the network (the SR2_BF pico is still on order).
- We did prep for the top filter test:
- We received, unpacked and temporarily stored a shipment of weights and other parts.
- We removed the top crossbars from the SR3 assembly frame.
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.
- Make in-air pico adapter cables.
- Test IM picos and BF yaw pico.
- Test FR.
- Calibrate LVDT.
- Get screws for ballast mass from Takahashi-san.
- Install ballast mass in BF.
- Set up for F0 test.
- Lower IM crossbars in SR3 assembly frame.
- Open curtain on SR3 crane slot.
- Set up dummy load (weight carrier, rods etc).
- Do F0 test.
- Bring in F0.
- Hook up dummy load.
- Adjust dummy load.
Plan for week of 2/5
- Enzo on vacation; 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.
Plan for week of 2/12
- Enzo on vacation; all others at Kamioka.
Vacation Info
- Enzo 1/30-2/19 (at Mitaka 1/29, part of 1/30)
- Kozu-kun 1/29-2/2