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| * Electronics * [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=3600| D1503600-v9 BS Suspension Cabling]] * [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5111| E1605111-v1 BS Suspension Electronic Items List]] * [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=3901| D1503901-v2 In-Vacuum Cable Detail]] * Need to hand-make geophone cables * Need to make longer versions of BF-PI and SF-PI cables (3.7 m and 2.5 m) * Need to check OSEM cables have same flip for flexicircuit as for PRx. * Asked Miyakawa-san for status on AEL items, especially stepper driver. * Compensation masses for RM/IRM ordered, expected 4/29 |
=== Type B (Mark) === ==== Report for week of 11/19 ==== * BS * Fabian did some debugging on the BS and found that the calibration for the F0 LVDT was off due to an Excel error, and that the sag wasn't quite the 7 mm originally observed, but still enough to cause the suspension to touch down. Enzo tried applying LVDT actuation at the GAS filters and got it to lift off far enough to get sensible TFs, but the required BF offset was enough to put the IM OSEMs at the very edge of their usable range, so this is not a good long-term solution. We can probably raise the F0 keystone during the vent by removing mass and/or installing an auxiliary spring, which will then allow us to return the BF keystone to nominal height. * While working on the BS, Enzo noticed that one of the stepper drivers was not responding. It turned out to be water damaged from the rain issues earlier in the year. Enzo and Fujii-kun opened the rest of the BS chassises on the second floor but they seem to be OK. Tanaka-san had made a third driver chassis as a spare, so we reserved that and will install it in the week of 12/10. * SRM * The SRM-W optic arrived and we installed it in place of the SRM-M in the metal mass, taking care to use 1.4 mm shims as recommended by Hirose-san. The weight of the new assembly was within 1 g of the old and did not disturb the height of the payload. There was a very small change in pitch which we corrected with the IM picos. * We installed the shelf for the OL receiver. * We added the arc weights and geophones and went through several rounds of improving the centering of the IP and then realigning the security structure back to vertical. * We calibrated the F0 LVDT, and checked the F0 and IP actuation signs. * We adjusted the SF trim masses to set the SF pitch and roll, did an inventory of the trim mass and set the damper gap. * We did a final alignment of the whole chain and left the suspension ready for TFs during the f2f week. There is only a few hours of work left before we can install and we hope to do that on Monday 12/10. * SR2 * Enzo replaced the geophones and cables that had been borrowed for calibration and did several rounds of optimization of the IP frequency. He got as low as 46 mHz but with poor Q and so backed off a bit to 55 mHz and may back off a tiny bit more. * I derived updated IP matrices for the BS and SR, with more precise geometry data provided by Hirata-san, and published them as T1707205 and T1807663. * I created a CENTERING screen for the IP, with large panel meters for the LVDT signals and the derived L, T and Y signals. * Enzo confirmed that the fancy stepper control screen created by Shoda-san worked. * We installed a modified LPCD as IM-V for testing. * SR3 * We moved HPCDs from BS and SR2 to replace the ones that had been stolen from SR3, so as to create a working suspension with an OL for Kozu-kun. ==== 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)]] |
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| * Hirata-san drew up flags * Lots of new drawings - see above or [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5035| E1605035 VIS Document and Drawing Tree (BS)]] |
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| = VIS Meeting on 2016/4/15 = 2016/4/15 13:30 - Room 210 & eZuce Participants: == Schedule == * #Schedule status (Aso) * #Will have a schedule meeting with Ando-san on April 15th in Kamioka (Takahashi, Mark, Shoda will come) == iKAGRA related activities == == PR3 == * PR3 Operation Status (Aso) * * Traverser and Stepper motor remote control (Shoda): * Aso will send a stepper motor driver from Kamioka to Mitaka for test.-> Done == iKAGRA ETM suspension == * Current status (Ohishi) == Electronics == * What are necessary in the next few weeks ? * BS: * [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=3600|JGW-D1503600 - BS Suspension Cabling]] * [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5111| E1605111 BS Suspension Electronic Items List]] * Gave dates to Miyakawa-san and asked for feedback and status (no reply yet). Also, some issues with previously ordered cables were brought to attention of Takahashi-san. * Watch dog system (Tanaka) * [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5108|Graceful shutdown mechanism]] * Will give a presentation at the next AEL meeting on 4/18 * #Electronics diagram and review * #Electronics document tree for VIS by Mark ([[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=4937|E1604937]]) * #Updated PR3 schematic with OpLev wiring ([[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=4795|D1604795]]) * #Who will manage the electronics of each suspension * Type-Bp will be controlled by Shoda but the diagram update will be done by Mark * Type-A may be maintained by a new engineer. Sould be discussed with the person before April . * #We need to count electronics and cables needed for the tests, such as temporary sensors and so on. == bKAGRA preparation == * Three big categories of the tasks * Type-A: Leader = Takahashi, Okutomi, Ishizaki, a new engineer * Type-B (BS and SRC): Leader = Mark, Fabian, Hirata * Type-Bp modification: Leader = Shoda, Fujii, A new technician (?) == Common Issues == * Policy of the screw types to be used (Mark, Fabian) [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5107|E1605107]] ([[https://onedrive.live.com/redir?resid=1447B05D5B571A84!346&authkey=!ABNrIarsklTd8Q0&ithint=file,docx|draft]]) * Reflection type local sensor (Akutsu) * Test widening the opening next week (Akutsu) -> [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=1459|report]] * Continue to work on how to fit the reflective sensor into the current coil bobbin (Akutsu) * OSEM assembly (Akutsu) * Schedule for each suspension is now given to Akutsu-kun == Type-B == * [[KAGRA/Subgroups/VIS/TypeB]] * [[https://onedrive.live.com/redir?resid=D5CCFA70A378E0D0!185&authkey=!AGcFDradxzrNJ00&ithint=folder,txt|Task list/schedule]] * Past Week Summary * Mark posted [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=3600|JGW-D1503600 - BS Suspension Cabling]], did a summary [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5111| E1605111 BS Suspension Electronic Items List]] and asked Miyakawa-san for feedback and status (no reply yet). Also, some issues with previously ordered cables were brought to attention of Takahashi-san. * Mirapro sent assembly frame quote based on [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5037|E1605037]] * Mark designed a clean bag [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5123 | T1605123]] * Fabian continued analysis of wire thickness versus mode frequency: [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5106|T1605106]] ([[https://onedrive.live.com/view.aspx?resid=1447B05D5B571A84!354&ithint=file,docx&app=Word&authkey=!AO5CHNP3xlO5RjY|draft]]) * Hirata-san investigated and found a good height for secondary prism was 3 mm. He drew up the dummy primary prisms and the secondary prisms: [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5125| D1605125]] * Hirata-san did drawings for the flags: [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5087| D1605087 Flag for BS RM]], [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5088| D1605088 Flag for BS IM]] * Hirata-san asked for quote on prisms and flags. * Hirata-san did assembly drawings for the safety bar between IM and RM and for the EQ stop: [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5127| D1605127]], [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5124|D1605124]], [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5112| D1605112 Flag for BS IM type2]] * Can we make SR wire breakers bigger? * Fukushima-san preparing test: 3/4/2016 + 1 month = ≈4/1/2016 -> Hirata-san and Takahashi-san talking to ATC 4/8 morning. * Flag design * [[https://onedrive.live.com/redir?resid=D5CCFA70A378E0D0!279&authkey=!ABLGQZIFvuQFtz4&ithint=folder,dwg|BS Flag Redesign on OneDrive]] * Drawings done, RFQ issued: [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5087|D1605087]], [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5088|D1605088]], [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5112| D1605112]] * Widen the OSEM opening (Akutsu) * A new local length sensing * Need to decide the strategy for BS: three choices * Use OSEMs as originally planned * Use OpLev, No OSEM flag * Use reflection type sensors, No OSEM flag * Decide later! * BS dummy optic * Ordered, expected ≈4/22 ([[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=4811|T1604811]]) * Prisms * New drawings for dummy primary prisms and secondary prisms: [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5125| D1605125]], safety bar between IM and RM [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5127| D1605127]], and for the EQ stop [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5124|D1605124]] * EQ stop screws, extensions and lock nuts (in manufacture - promised for 4/22) * Ballast masses for payload * Hirata-san created drawings [[https://www.dropbox.com/sh/t5tfj9uvdkldk1d/AAB0ypH6SZpZjBYK0E0416Lwa?dl=0|DropBox link]] * Drawings were checked by Mark, not yet ordered. * Lower breadboard stuff * Breadboard spring bases and associated cable clamps (in manufacture, expected 4/15) * Breadboard springs (in manufacture) * Damper ring mods (in manufacture, expected 4/28) * Nail-head parts: quote from Mirapro received, not urgent, will be combined with assembly frame order. * BS Assembly Frame Design (Mark, Hirata) * Quote received, drawings being checked. Will need minor modifications to support clean bag (see below). * Clean bag * Design done: [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5123 | T1605123]] * Aso-san will order * 2D and 3D CAD * BS 3D Assembly * Lots of new drawings - see above or [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5035| E1605035 VIS Document and Drawing Tree (BS)]] * 3D CAD for BS assembly frame received from Mirapro - Hirata-san is adding clean bag extension and rail stuff. * Electronics * Lots of work: * [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=3600|JGW-D1503600 - BS Suspension Cabling]] * [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5111| E1605111 BS Suspension Electronic Items List]] * [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=3901| D1503901 In-Vacuum Cable Detail]] * Item list and timetable was given to Miyakawa-san. * Need to get new longer versions of some previously ordered BF-PI and SF-PI cables (Takahashi). * Need to check previously ordered TM-BF and IM-BF OSEM cables have been flipped (Takahashi). * Decided to hand-make cables for geophones because previously ordered cables have no conductor on pin 5. * Need to get status on design of stepper drive box (requested by Sekiguchi-san [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=3385|T1503385]]) * Procedure documents * No action since last week * Mirror box (Tatsumi) * Hirata-san is working on this as top priority - design decided, drawings being checked, will get them to Tatsumi-san ASAP. * BS clamp blocks already adjusted. * Not enough crane height problem (Hirata, Saito) * No action since last week == Type A == * [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=4792|Task list]] (Takahashi) * Prototype test<<BR>> * The prototype EQ stop was transported from Kashiwa to Kamioka on 31th March. * Assembly of the EQ stop prototype on 6-7 April next to the SR3 chamber. -> Found a lot of things to improve. Report by Okutomi. * Will redeisgn the EQ stops for the actual Type-A suepsnions. * Demonstration of installation procedure using prototype filters (SFx1 + BFx2) from May * Use the prototype EQ stops with the old Type-B assembly frame * Clean booth construction for SR will start from July 1st. * The location will be between SR2 and SR3. Will talk with Saito-san if this plan is OK or not on 4/15 (Takahashi) * The next Type-A meeting will be on 4/14. * The test of prototype long maraging rod was started. Detail is here: http://klog.icrr.u-tokyo.ac.jp/osl/index.php?r=1185 * Load dependence was measured using a laser position sensor. Extension of 2.84mm was observed for the load of 272.8kg. The extension is consistent with the calculation (2.75mm). * Maraging rod preparation status * 2 sets for magnetic dampers are missing * 4 long maraging rods will * Care on the humidity should be taken to store maraging steel to avoid cracking noise. * Type-A Filters Optimal Load Measurements * Started the measurements and installation of fishing rods: [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5105|report]] * Simultion (Okutomi) * Simulation with a dummy payload (report) * Will update the seismic noise data. * Need to implement the damping control part to see the damped RMS. * Ballast masses for the top filter may interfere with the magic wands. * Need to check how many ballast masses are necessaryfor Type-B and see if they interfere (Mark). If so we need to modify the mass like making some cuts. == Type-Bp modification == * This Week * Working on the CAD model and control simulation of BF modification (Shoda) * Details will be reported at the next meeting. * Traverser motor driver (Shoda) * Need a box for stepping motor driver. Miyakawa-san is thinking about ordering chassis and boxes for motors. We discussed and agreed that the design of the boxes will be unified. The boxes will be designed and ordered together with those. (16/03/10) * Miyakawa-san wants to have a driver and a motor to test * Will give them to MIyakawa-san when Shoda-san come to Kamioka for the shifts . -> Done (3/28) * Shoda is also asking Uraguchi-san to provide one more Traverser motor driver for the test. * Modification for bKAGRA * [[KAGRA/Subgroups/VIS/TypeBp|wiki]] * Uraguchi-san proposed us the new IP plan * Shoda updated the proposal(concerns?) for the BF active damping plan * Action items for Type-Bp modification * Calculate the upper limit of the resonant fequency for IP (Fujii): [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5096|MeetingMemo]] * Check if we need the magnetic damper for the bottom filter (Fujii): [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5096|MeetingMemo]] * Either the MD is used or the resonant frequency of the IP should be matched with the whole chain resonance. * Check the mass of the bottom plate and the cap of the standard filter -> Send Uraguchi-san (Shoda) . -> Done (3/31) * Check structure analysis of the EQ stop for active damping on BF (Shoda) * Check the minimam weight we need for the BFRM in order to damp the resonance enough (Shoda) * Check the capability to modify the BF cap (Shoda) . '''We want the correct CAD model for the original Type-Bp''' * The BF and SF designs are the same for Bp and B except for the blades. So the effort to make correct CAD models for those filters can be unified between the two teams. Hirata-san with help from Shoda-san will work to make correct CAD models. * Will have a meeting with Virgo people sometime soon. Then have a review for Type-Bp == Site work plan for the next week == * Mon: * Tue: * Wed: * Thu: * Fri: == Travel Plans == * Travel (Week of 4/18) * Takahashi:23-25 (Shift) * Shoda: * Mark: * Fabian: * Okutomi: * Fujii: * Ishizaki: * Hirata: * Ohishi: * Travel (Week of 4/25) * Takahashi: * Shoda: * Mark: * Fabian: * Okutomi: * Fujii: * Ishizaki: * Hirata: * Ohishi: == Other == * Safety * * #GAS blade inspection by Virgo (Takahashi) * Shipped the blades. Will get results in 1-2 months. == Next meeting == 2016/4/22 (Fri) 13:30 - |
==== Plan for week of 12/3 ==== * f2f Meeting at NAOJ - no Kamioka work. ==== Plan for week of 12/10 ==== * Crane SRM into tank. * Install new F0 yaw mechanisms on SRs. * Remove First Contact from SRM, unlock and realign. * Move SRM in-air cables over. |
Scraps of text for incorporation in the VIS Meeting Minutes
KAGRA/Subgroups/VIS/MeetingNAOJ
Type B (Mark)
Report for week of 11/19
- BS
- Fabian did some debugging on the BS and found that the calibration for the F0 LVDT was off due to an Excel error, and that the sag wasn't quite the 7 mm originally observed, but still enough to cause the suspension to touch down. Enzo tried applying LVDT actuation at the GAS filters and got it to lift off far enough to get sensible TFs, but the required BF offset was enough to put the IM OSEMs at the very edge of their usable range, so this is not a good long-term solution. We can probably raise the F0 keystone during the vent by removing mass and/or installing an auxiliary spring, which will then allow us to return the BF keystone to nominal height.
- While working on the BS, Enzo noticed that one of the stepper drivers was not responding. It turned out to be water damaged from the rain issues earlier in the year. Enzo and Fujii-kun opened the rest of the BS chassises on the second floor but they seem to be OK. Tanaka-san had made a third driver chassis as a spare, so we reserved that and will install it in the week of 12/10.
- SRM
- The SRM-W optic arrived and we installed it in place of the SRM-M in the metal mass, taking care to use 1.4 mm shims as recommended by Hirose-san. The weight of the new assembly was within 1 g of the old and did not disturb the height of the payload. There was a very small change in pitch which we corrected with the IM picos.
- We installed the shelf for the OL receiver.
- We added the arc weights and geophones and went through several rounds of improving the centering of the IP and then realigning the security structure back to vertical.
- We calibrated the F0 LVDT, and checked the F0 and IP actuation signs.
- We adjusted the SF trim masses to set the SF pitch and roll, did an inventory of the trim mass and set the damper gap.
- We did a final alignment of the whole chain and left the suspension ready for TFs during the f2f week. There is only a few hours of work left before we can install and we hope to do that on Monday 12/10.
- SR2
- Enzo replaced the geophones and cables that had been borrowed for calibration and did several rounds of optimization of the IP frequency. He got as low as 46 mHz but with poor Q and so backed off a bit to 55 mHz and may back off a tiny bit more.
- I derived updated IP matrices for the BS and SR, with more precise geometry data provided by Hirata-san, and published them as T1707205 and T1807663.
- I created a CENTERING screen for the IP, with large panel meters for the LVDT signals and the derived L, T and Y signals.
- Enzo confirmed that the fancy stepper control screen created by Shoda-san worked.
- We installed a modified LPCD as IM-V for testing.
- SR3
- We moved HPCDs from BS and SR2 to replace the ones that had been stolen from SR3, so as to create a working suspension with an OL for Kozu-kun.
To-Do Lists, Schedule
Plan for week of 12/3
- f2f Meeting at NAOJ - no Kamioka work.
Plan for week of 12/10
- Crane SRM into tank.
- Install new F0 yaw mechanisms on SRs.
- Remove First Contact from SRM, unlock and realign.
- Move SRM in-air cables over.