= VIS Meeting on 2016/5/13 = 2016/5/13 13:30 - Room 210 Participants:Hirata, Takahashi, Ishizaki, Mark, Fujii, Okutomi, Fabian, Aso, Tanaka, Sato, Shoda, Akutsu == Overall Schedule == * The current overall schedule [[https://www.dropbox.com/s/zbhhxlyd79sqe1w/VIS-2016-04-15.pdf?dl=0|chart]]. = iKAGRA related activities = == PR3 == * PR3 post-run work status & plan (Shoda) * Transfer function measurements in the air: same as before. * 0.2Hz peak in OpLev was caused by the increased seismic after the earthquake. * Locked the suspension to measure the 3D coordinates of the mirror * Schedule * 5/16: measurement of PR3 mirror position relative to the vacuum tank * 5/17: OpLev wind shield test?, Inner frame status check. * 5/18: Extended chief meeting * 5/19, 20: Evacuation == IP tests in Kamioka == * Status report by Fujii: slides * Control test may be performed with the hanging test of BS * Ask if we can perform the control test remotely (Aso) * Ask Joris what is his intention and schedule (Raffaele) == iKAGRA ETM suspension == * Uninstallation status (Ohishi) * Mirrors were shipped to Mitaka ? = bKAGRA preparation = == Important Issues == * Length sensing OpLev * #In order to test this with the BS test haning, we want to have wide OSEMs as witness sensors on the mirror. * #Stab-flag and tipped flag are both in quotation. We will order both. The gluing jigs will be the same. * Who will design and prepare the BS length sensing OpLev ? -> '''Ask Simon (Aso)''' * What shall we do with PR2 * PR2 chamber has only one viewport avaibale at 45deg. angle for OpLev * Original idea: Put a reflecting mirror on the bread board and monitor the rotation of the bread board with another OpLev. * No length sensing * Two OpLevs needed * Another idea: Introduce the light with a fiber into the vacuum chamber to form a one-way 45deg. OpLev for length sensing. * Length sensing possible * Affected by the vacuum chamber tilt (if we mount the fiber collimator to the inner frame, the tilt will be less). * Need to find a place to mount the fiber collimator inside the vacuum chamber * '''See if we can find any mounting point on the inner frame (Akutsu) by the next next VIS meeting.''' * Suspended bread board * #Many critical components will be installed on it (baffles, steering mirrors for the green injection etc) * We have to make sure that the bread board suspension is properly damped * Takahashi checked Sekiguchi thesis * Looks like we can estimate the damping force from his experimental results. '''Takahashi will calculate the necessary number of magnets.-> by the next VIS meeting''' * Accelerometers for IP * Geophone is too noisy for innertial damping in Kamioka * TAMA SAS accelerometers for Type-A * NIKHEF accelerometers for BS ? * Which accelerometers for SR ? * Buy from NIKHEF ? How much is the cost ? * Get the design from NIKHEF and produce them in Japan (ATC) ? * Pre-isolator assembly and tests * What is the plan for SR Type-B * Takahashi and Mark will start the discussion on, where, who, when. * Bottom filter local sensor for Type-A * What is the plan ? * Tell SEO about the wider cross tube * EQ stop design should take into account of the sensor/actuator mounts. * Fix EQ stop at the bottom ? * Use the same sensor/actuator as Type-Bp ? * Sato-san is responsible for this part. * #Dummy payload design for Type-A * Okutomi-kun is assigned. == Common Issues == * Wide OSEM production (Akutsu) * For BS test hanging, we need the wider version by mid-to-late June. * Got cost estimates for the small parts. Will order for 20 OSEMs. === Electronics === * What are necessary in the next few weeks ? * We need to count the number of necessary circuits for Type-A and Type-Bp, so that we can tell AEL the total number necessary for VIS. * '''Make a list by the end of May (Shoda, Takahashi)[[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5193|List]] ''' * There are some uncertainties in the number of necessary circuits. * Make a list with ranges of numbers for uncertain things by the next VIS meeting. Then talk to AEL. * '''SRx will probably not have geophones, so Mark will need to do a revision too.''' * Watch dog system (Tanaka) . [[http://gwdoc.icrr.u-tokyo.ac.jp/DocDB/0051/E1605194/001/Project%20WDS%20Experiment%20%202016_05_13.pdf|Document(pdf)]] * photo-MOS relay switch resistance fluctuation * '''Noise requirement for the resistance fluctuation is necessary (Aso) ''' * Tanaka measured the photo-MOS relay resistance fluctuation-> 37mOhm RMS upper limit * Will make spectrum of the resistance fluctuation. * '''DC-DC convertor noise check: quiter than a battery ? ''' * '''#The next step: Make a prototype with slow shutdown mechanism''' == 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 * Flags and metal prisms ordered; expected 5/31. * New assembly drawing [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5179|D1605179]] focussing on items not part of main chain (and associated screws): * Crane adapter * Lower breadboard blade module (with cable clamps) * IM-RM safety bar ([[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5127|D1605127]] from last week now obsolete) * 3D assembly changed to have geophones instead of accelerometers (but SRx will probably be per original design - need to revisit circuit diagram) * Concept for load gauge adapter decided (reuse crane adapter plate and jacks from below PI; add Misumi crossbars, cleanroom-compatible chain hoist: [[attachment:Crane Frame.pdf]]) * Concept for second floor of clean booth decided (remove all floor panels; add bridge panels at right angles: [[attachment:BS Cleanbooth.pdf]]) * Modified drawings for main assembly frame and drawings for most small parts (jack adapters etc) received from Mirapro. * Wire sizes decided: 300 µm piano wire and 500 µm tungsten (will revisit this later). * Lots of work by Fabian on [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=4817|E1604817 BS Payload Assembly Procedure]] ( [[https://onedrive.live.com/redir?resid=D5CCFA70A378E0D0!191&authkey=!AMe0pdcd9GDm1H0&ithint=folder,webloc|Draft on OneDrive]]; (IM and RM assembly sections now finished) * Lots of work by Mark on [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=4235|E1504235 BS Assembly Procedure]] ([[https://onedrive.live.com/redir?resid=D5CCFA70A378E0D0!195&authkey=!AM_usynuo9QI57g&ithint=folder,webloc|Draft on OneDrive]]) * Hirata-san measured another SF. * '''Discussions ''' * Need more realistic schedule * Take into account the preparation of SR suspensions * SRM and PRM payloads need to be ordered. * IM assembly * Planning to do it in ATC. Use the clean room used for the SF assembly. * Fabian will start the preparation from the next week. * Wires * Fabian continued analysis of RM wire thickness versus mode frequency: [[https://onedrive.live.com/redir?resid=1447B05D5B571A84!442&authkey=!AKrjBW2W8vMKyAY&ithint=file,pdf|link]], [[https://onedrive.live.com/redir?resid=1447B05D5B571A84!421&authkey=!ALZY-tFtMCYI9Pw&ithint=file,pdf|another link]],[[https://pfalig.bn1301.livefilestore.com/y3mT7oHnuBfD9_7Ata6H90opTVY5IIIm78MQ8Rl-lChfSUtGhGiEP-mlB1rQuzliimi-pmL1JfYTKCUY_Tgan0Bfa2jq5EeSXWiCracw_5ulsm2iuf6RHJcz0ot34DaeWqdUjFnU6fILnyau69WFkBmUcTwfGYBNwSrs27eyK-jc90/RM_wire.pdf?psid=1|yet another link]] (From last week: [[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]]) * Can we make SR wire breakers bigger? * Fukushima-san preparing test: 3/4/2016 + "1 month" = ≈4/1/2016, not ready as of 4/8.-> Takahashi will ask the status. * Flags, Prisms * [[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]] * IM and BS flags and metal prisms ordered; expected 5/31 * BS dummy optic * Ordered, expected ≈4/22 ([[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=4811|T1604811]]) * Decided to have it shipped to Mitaka for initial assembly and give it to Tatsumi-san for prisms/flags. * Mirror box (Tatsumi) * Tatsumi-san has ordered modifications to mirror box for final flags and prisms. * An extra structure attached to the EQ stop to prevent tipping over of the BS. * Will consider if we can make it to the test hanging. But not critical for the test hanging. * No action since last week. * Not enough crane height problem (Hirata, Saito) * No action since last week * 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) * Hirata-san did new Inventor assembly with Mirapro's initial design plus various improvements including clean bag supports. * Clean bag * Ordered - expected 6/8. * 2D and 3D CAD * [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5035|E1605035 VIS Document and Drawing Tree (BS)]] * BS 3D Assembly * 3D CAD for BS assembly frame revised again (seismometers changes to geophones). * Electronics * [[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 - some corrections received and added to schematic but not yet posted. * Status on AEL boxes OK according to Miyakawa-san. * Need to order LVDT oscillator cards from NIKHEF (Takahashi) and have a signal generator and cable in the meantime (Mark). * 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. * Stepper drive box (requested by Sekiguchi-san [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=3385|T1503385]]) is being designed, should be ready in time. * Procedure documents * Mark worked on BS Assembly Procedure [[https://onedrive.live.com/redir?resid=D5CCFA70A378E0D0!195&authkey=!AM_usynuo9QI57g&ithint=folder,webloc|E1504235 draft]] == Type A == * [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=4792|Task list]] (Takahashi) * Where to perform the TF+IP assembly ? * The large access door to the ATC clean room is not available until Octorber or November. Doing the assembly work in Mitaka is next to impossible. * * Prototype testof the EQ stop<
> * Purpose of the test needs to be clarified to decide on where to perform the test. * The test of prototype long maraging rod was finished * Will order them with maraging rods for the cryogenic payload early July. The lead time is 2 months. * Type-B Standard Filters preparation * 5 SF measurements were done. http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5105 * The shell of the 2 filters were too tight. Were able to open but could not close one of them. * The ones we cannot close the shell, we can use them for the Type-Bp. * Ship them to Kamioka * Type-A SF preparation * Needs to cut more finshing rod blades. * The next Type-A meeting will be on 5/26. * #Simultion (Okutomi) * #Local sensors for BF == Type-Bp modification == * Modification for bKAGRA * wiki * Discussing with ATC people for the mechanical modification. * Got some comments * Estimating the noise requirements for the BF sensor/actuator * Full CAD model of the original Type-Bp needs to be created == Site work plan for the next week == * Mon:PR3 measurements, IP * Tue: PR3 measurements, IP * Wed: Extended Chief Meeting * Thu: PR3 measurements, IP * Fri: PR3 vacuum evacuation, IP == Travel Plans == * Travel (Week of 5/16) * Takahashi: 17-20 (chief meeting and IP) * Shoda:16-20 (PR3) * Mark: * Fabian: * Okutomi:15-18 (PR3) * Fujii:17-20 (IP) * Ishizaki: * Hirata: * Ohishi: * Travel (Week of 5/23): * Takahashi: * Shoda: Elba * Mark: * Fabian: * Okutomi: Elba * Fujii:23-27 (Accelerometer, PR3) * Ishizaki: * Hirata: * Ohishi: Mark is away: July 8-20 == Other == * Safety:no incident * #GAS blade inspection by Virgo (Takahashi) * Shipped the blades. Will get results in 1-2 months. == Next meeting == 2016/5/20(Fri) 13:30 -