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| * Type B Past Week Summary * Fabian, Mark, Yokogawa-kun and Kuwahara-kun did BS installation at Kamioka: * Calculated BS pitch correction ([[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5630|JGW-T1605630]]) * Hung dummy optic and set pitch. * Prepared RM for hanging (adding OSEMs etc). One OSEM (#24) had wobbly leads and was brought back to Mitaka for rework. * Placed vacuum feedthroughs on assembly frame and cleaned initial batch (4) of D-Sub cables. * Decided position of BS rack with Miyakawa-san. * Measured various maraging rods and the rod holders on the SF. * Placed safety rails, rearranged floor panels, cleaned new floor panels, and otherwise improved safety. * Hirata-san: * Made new 3D models of the maraging rods for PRx and SRx * Made new collet design for PRx and SRx (3D and 2D). * Made new IM flag design for PRx and SRx (3D and 2D). * Washed lots of Type A BF parts and OSEM parts. * Cleaned the BS BF-IM maraging rod and organized the rest of the stock of rods. * Measured some BF part dimensions. * Pre-assembled parts for BFs. * Type B ongoing issues * Longer term to-do list * Do Inventor assembly for SR2 in chamber and on assembly frame (Hirata) - NEARLY DONE. * Part "disk security" top has to be modified - screw positions do not match. * Write more of payload assembly procedure (Fabian) - ONGOING * Write more of BS Assembly Procedure [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=4235| E1504235]], [[https://onedrive.live.com/redir?resid=D5CCFA70A378E0D0!195&authkey=!AM_usynuo9QI57g&ithint=folder,webloc|E1504235 draft]] (Mark) - ONGOING * Lower breadboard installation to be incorporated into the procedure document. * Work on BS simulation (Fabian) * Do BS Simulink model (Mark, Kokeyama) * Do 2D drawings of SR2 parts (Hirata) * Redesign SRx IM wire clamps for larger prisms, remachined RMs * Order SRM/PRM parts (Hirata/Shoda) * Order SRx fasteners (Hirata) |
=== Type B (Mark) === ==== Report for week of 6/18 ==== * Mark checked the health of the suspensions after an earthquake on Monday morning. The BS watchdog tripped and there was a few µrad change in the pointing, but otherwise it was fine. SR3 and SR2 were also fine. * Mark, Enzo and Terrence finalized the trim mass on the BF to set the SF keystone height and BF pitch/roll. * They weighed the SF/... section. With no internal trim mass in the SF but with the flying saucer and rod, but with 2 Promec masses for rough balance, it was 255.4 kg, so allowing 1 kg for cables and fine trim mass, we would like a PI load capacity of 256.4 kg. * Enzo and Terrence cabled and tested the SF fishing rod, and reversed the connections on the SF LVDT actuation to bring it to standard polarity. * Mark and Enzo made many improvements to the Type B MEDM screens. * Enzo and Mark measured the BF and SF bounce frequencies (with the other keystone locked). * Enzo replaced a HPCD that seemed to have failed during the bounce test (but had just had a watchdog trip), and then replaced the replacement, which really did fail. It turns out we need to avoid applying more than about 25000 counts of GAS actuation. * Enzo offloaded the BF LVDT actuator with the BF FR to remove the need for a 10000 ct offset. * Hirata-san and Kozu-kun struggled to tune the top filter for SR3 - see klogs 5310, 5324, 5337, xxxx. At first the results were somewhat unrepeatable, with high frequency and low load capacity. This was improved by using a torque wrench (set to 50 N.m) to tighten the blade base clamp screws, retightening the blade tip screws (which had worked loose) and tightening the collar on the end of the shaft of the magic wand. Eventually we decided on a compression of 30 mm, which should give a frequency of around 0.5 Hz if we remove one Cu damper segment from the SF. Hirata-san applied the 30 mm compression but we skipped another round of testing with the dummy load and will go straight to hanging the SF/... section on the assembly frame. * We wrapped PI #1 (for SR2) and craned it from behind SR3 to behind SRM. We can now wrap PI #3 (for SR3) and crane it straight to the assembly frame. ==== Plan for week of 6/25 ==== * Mark, Enzo, Hirata-san, Terrence at Kamioka Mon-Fri. * Kozu-kun at Kamioka except Thu. * -- * Shutdown Type B controls (as far as possible) in preparation for risk of accidental power outage during electrical work on 6/26. * Prepare SF damper magnet ring and rods. * Install PI #3 in SR3 AF. * Suspend SF/... section. * Lots of cable routing and testing. * Move PI #1 (for SR2) over SRM tank to work area, install blades and tune. |
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| ==== Plan for week of 7/2 ==== * Mark, Hirata-san, Terrence at Kamioka Mon-Fri. * Enzo at Kamioka Mon-Wed. * Kozu-kun at Kamioka except Wed. * -- * Lock suspension. * Remove tank lid and raise LBB damper rings. * Crane suspension into tank. ==== To-Do Lists, Schedule ==== * [[KAGRA/Subgroups/VIS/TypeB/ToDoBS]] * [[KAGRA/Subgroups/VIS/TypeB/ToDoSR]] * [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=7779|JGW-L1807779 Type B Schedule (SR)]] ==== Vacation Info ==== * Kozu-kun: 7/4 Tokyo. * Enzo: 7/5-6 NAOJ Party, Mitaka. * Terrence: 8/24-26 f2f, then returns to Hong Kong. * Enzo: 9/14 JPS, 9/15 through 10/18 vacation in Chile. |
Scraps of text for incorporation in the VIS Meeting Minutes
KAGRA/Subgroups/VIS/MeetingNAOJ
Type B (Mark)
Report for week of 6/18
- Mark checked the health of the suspensions after an earthquake on Monday morning. The BS watchdog tripped and there was a few µrad change in the pointing, but otherwise it was fine. SR3 and SR2 were also fine.
- Mark, Enzo and Terrence finalized the trim mass on the BF to set the SF keystone height and BF pitch/roll.
- They weighed the SF/... section. With no internal trim mass in the SF but with the flying saucer and rod, but with 2 Promec masses for rough balance, it was 255.4 kg, so allowing 1 kg for cables and fine trim mass, we would like a PI load capacity of 256.4 kg.
- Enzo and Terrence cabled and tested the SF fishing rod, and reversed the connections on the SF LVDT actuation to bring it to standard polarity.
- Mark and Enzo made many improvements to the Type B MEDM screens.
- Enzo and Mark measured the BF and SF bounce frequencies (with the other keystone locked).
- Enzo replaced a HPCD that seemed to have failed during the bounce test (but had just had a watchdog trip), and then replaced the replacement, which really did fail. It turns out we need to avoid applying more than about 25000 counts of GAS actuation.
- Enzo offloaded the BF LVDT actuator with the BF FR to remove the need for a 10000 ct offset.
- Hirata-san and Kozu-kun struggled to tune the top filter for SR3 - see klogs 5310, 5324, 5337, xxxx. At first the results were somewhat unrepeatable, with high frequency and low load capacity. This was improved by using a torque wrench (set to 50 N.m) to tighten the blade base clamp screws, retightening the blade tip screws (which had worked loose) and tightening the collar on the end of the shaft of the magic wand. Eventually we decided on a compression of 30 mm, which should give a frequency of around 0.5 Hz if we remove one Cu damper segment from the SF. Hirata-san applied the 30 mm compression but we skipped another round of testing with the dummy load and will go straight to hanging the SF/... section on the assembly frame.
- We wrapped PI #1 (for SR2) and craned it from behind SR3 to behind SRM. We can now wrap PI #3 (for SR3) and crane it straight to the assembly frame.
Plan for week of 6/25
- Mark, Enzo, Hirata-san, Terrence at Kamioka Mon-Fri.
- Kozu-kun at Kamioka except Thu.
- --
- Shutdown Type B controls (as far as possible) in preparation for risk of accidental power outage during electrical work on 6/26.
- Prepare SF damper magnet ring and rods.
- Install PI #3 in SR3 AF.
- Suspend SF/... section.
- Lots of cable routing and testing.
- Move PI #1 (for SR2) over SRM tank to work area, install blades and tune.
Plan for week of 7/2
- Mark, Hirata-san, Terrence at Kamioka Mon-Fri.
- Enzo at Kamioka Mon-Wed.
- Kozu-kun at Kamioka except Wed.
- --
- Lock suspension.
- Remove tank lid and raise LBB damper rings.
- Crane suspension into tank.
To-Do Lists, Schedule
Vacation Info
- Kozu-kun: 7/4 Tokyo.
- Enzo: 7/5-6 NAOJ Party, Mitaka.
- Terrence: 8/24-26 f2f, then returns to Hong Kong.
- Enzo: 9/14 JPS, 9/15 through 10/18 vacation in Chile.