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== Task list ==
[[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=4792]]		 Information of the Type-A Seismic Attenuation System (SAS).
This page wants information about not only room-temperature parts but also cryogenic vibration isolation system.
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= Type-A Meeting on 2016/8/23 =
2016/8/23 13:00 - 14:30 @Large meeting room		 == Status ==
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Participants: Takahashi, Sato, Okutomi  * [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Subgroups/VIS/TypeA/WorkingLog|Site work log]]
 * [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=4792|Schedule (Task list)]]
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=== Minutes ===
 0-2 Simulation (Okutomi)
  * Calculating requirement for actuators and sensors.
  * Estimated the case using F7 LVDT, and the case using actual LVDT.
  * Summarized within today, and present in the f2f meeting.
 2-1 Setting of top chamber (VAC)
  * Leak test should be performed in December, 2016.
 3-2 Assembly of TF+IP (Sato)
  * Takahashi had a meeting on the place with Flaminio and Aso.
  * The place has not decided yet. Next meeting will be held on 25th.
 3-5 ACC preparation (Sato)
  * Measured 6 sets were transported to Kamioka.
  * Calibration is planed at the site from 5th in September.
 4-4 Transportation of SF (Hirata)
  * 6 sets were transported to Kamioka on 17th.
 5-6 Design of damper (Sato)
  * Structure analysis was applied to the model.
  * Bracket of primary coil: 102Hz, bracket of secondary coil: 124Hz, including ring (t=20mm): 100Hz
  * The shape of adjustment hole will be changed from long circle to large circle.
 5-8 Test of LVDT (Okutomi)
  * Designed adapter for primary coil.
  * Considering set up for actuator.
  * Coil bobbins of prototype were delivered on 19th.
  * Amplitude of oscillator should be larger (now 1V).
 6-2 Procurement EQ stop (Takahashi)
  * The bidding was announced on 17th. Two companies had contact.
 6-3 Test of prototype (Ishizaki)
  * Suspension test using maraging wires was performed on 18th.
 6-6 Circuit for release sensor (Sato)
  * This item should be added.
 9-6~9 Installation (Ishizaki)
  * Protection net, hoist tool, foot hold, handling tool were added as new item.		  * [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Subgroups/VIS/TypeA/ETMX|ETMX]]
 * [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Subgroups/VIS/TypeA/ETMY|ETMY]]
 * [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Subgroups/VIS/TypeA/ITMX|ITMX]]
 * [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Subgroups/VIS/TypeA/ITMY|ITMY]]
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Next meeting: 2016/8/30 13:00 ------
<<TableOfContents(3)>>
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= Type-A Review on 2016/8/10 =
[[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5516]]		 [[TypeAoverview|{{attachment:TypeAoverview.png||width=33%,align="right"}}]]
[[TypeAdesign|{{attachment:figTypeAsasNamed3.png||width=33%,align="right"}}]]
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= Type-A Meeting on 2016/8/9 =
2016/8/9 13:00 - 14:00 @Room210		 == Drawings ==
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Participants: Takahashi, Ishizaki, Sato, Okutomi  * Type-A SAS whole assy
 * Vacuum chamber
  * [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5794|Vertical]] (IXV, EXV, IYV, EYV)
  * Cryostat
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=== Minutes ===
 0-1 Assy. (Ishizaki)
  * Made the model of EQ stop.
 0-2 Simulation (Okutomi)
  * Calculated coupling to the yaw mode assuming asymmetry of 1mm and 3mm. The result was linear.
  * Updating the calculation (Next by 8/10).
 3-5 ACC preparation (Sato)
  * Additional 3 sets have not been extracted yet.
 3-6 Procurement of counter weight
  * Delay.
 4-2,3 Standard filter (Hirata)
  * The 6th set will be finished on 10th.
 5-6 Design of damper (Sato)
  * Design of frame and jigs was progressed.
  * We consulted with a company on procurement.
 5-8 Test of LVDT (Okutomi)
  * Measured responce of LVDT sample. The signal was linear in 20mm range.
  * Found phase noise at the level of 10^-6m/rtHz.
  * Bracket for prototype is necessary.
 6-1 Design of EQ stop (Ishizaki)
  * Made 2D drawings for the bidding.
  * Tolerance and surface accuracy should be indicated.
  * The tolerance for the rods with the same length must be less than 0.2mm.
  * The specification document and drawings should be sent by the 12th.
 6-4 Design of release sensor (Sato)
  * Height of base was 56mm. Changed to 50mm.
 8-1 Design of dummy payload (Okutomi, Ishizaki)
  * The length of Hook was reduced.
 9-1 Installation procedure (Takahashi)
  * The document will be revised by the review.
 9-3 Cable assembly (Sato)
  * Total 20 system.
  * 7 interfaces are necessary.		 === Tower ===
 * [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5460|Earthquake stop - Security frame]]
 * [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=6918|Pre-Isolator]]
  * [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5636|Top Filter (TF)]]
  * [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5637|Inverted Pendulum (IP)]]
  * [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5638|F0 LVDT-actuator unit]]
  * [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5639|Blade spring for static position adjustment]]
 * Magnetic Damper (MD)
 * [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5635|Standard Filter (SF)]]
 * Bottom Filter (BF)
  * [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5656|BF LVDT and Attachments]]
 * [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=2555|Fishing rod]]
 * [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5743|Maraging wire]]
 * [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5461|Dummy Payload]]
 * [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5462|Hoist's tools]]
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Next meeting: 2016/8/16 13:00 === Cryogenic Payload ===
 * Cryo-Payload assy
 * Platform (PF)
 * Marionette (MT)
 * Marionette Recoil Mass
 * Intermediate Mass (IM)
 * Intermediate Recoil Mass
 * Test Mass (TM) - Sapphire Mirror
 * Recoil Mass
 * Heat link
  * Heat link suspension
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= Type-A Meeting on 2016/8/1 =
2016/8/1 13:00 - 16:00 @Room210		 -----
== Documents ==
=== Reports ===
 * [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5196|Requirements for Type-A SAS]]
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Participants: Takahashi, Ishizaki, Sato, Okutomi === Installation Procedure ===
 * [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=410|Initial concept]]
 * [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5500|Installation procedure of Type-A system]]
 * [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=9838|Installation direction of Bottom Filter]]
 * [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=10522|TF Yaw drive mechanism Initial adjustment]]
=== Measurement and Analysis ===
 * Type-A Control Simulation
  * [[https://docs.google.com/spreadsheets/d/1QlaeJ4hME5J6iZWzPmfPFsq5aKwTP3a-1Rd9sqKIExM/edit?usp=sharing|Parameters for simulation]]
   * Shared with Google spread sheet (Browsing and commenting are permitted. Please contact to Okutomi for editing permission.)
   * Under checking the parameters to be more realistic based on measurements and drawings
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=== Minutes ===
 0-1 Assy. (Ishizaki)
  * Made the model of EQ stop and pre-isolator.
  * Each filter is placed at the side stopper.
  * The IP is put on the top plate directly at present, but a gap is necessary.
  * Take account of stretch of the wires.
 0-2 Simulation (Okutomi)
  * Introduction of coupling to the yaw mode was wrong in the last calculation.
  * Updating the calculation.
 1-1 Clean booth (FCL)
  * The lighting is made by the LED inside the booth.
 3-2 Assembly of TF+IP (Sato)
  * The assembly work will be started on 30th August at the KAGRA site.
 3-5 ACC preparation (Sato)
  * Additional 3 sets have not been extracted yet.
 4-2,3 Standard filter (Hirata)
  * The 5th set was finished.
 5-1 Manufacturing of blade (Takahashi)
  * The thermal process for the blades was finished.
 5-6 Design of damper (Sato)
  * The plate for damper is independent of EQ stop frame.
  * Each LVDT has position adjustment.
 5-8 Test of LVDT (Okutomi)
  * Set the test bench for LVDT sample at ATC lab.
  * Making 2-pin lemo cables.
  * A summer student will join to the test.
 6-1 Design of EQ stop (Ishizaki)
  * Made 2D drawings for the bidding.
  * The date for the announce of bidding is the 17th August.
  * The specification document and drawings should be fixed by the 10th.
 6-3 Test of prototype (Ishizaki)
  * Tested connection and lift down of the EQ stop prototype on 27th July.
 6-4 Design of release sensor (Sato)
  * Set at 5mm under of each filter.
  * The shape of jigs will be modified with thick base.
 8-1 Design of dummy payload (Okutomi, Ishizaki)
  * The bottom should be a breadboard with 50mm interval.
 9-1 Installation procedure (Takahashi)
  * The first draft was shown and discussed.
  * The height setting for each filter is important.		  * [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5105|[2016.08.15] Measurements of Standard Filter]]
  . Data of weight, optimal load, GAS resonant frequency, keystone height
  . Combination of the standard filters for Type-A with ID
   * X end: 3-2(F1), 2-2(F2), 1-4(F3)
   * Y end: 3-3(F1), 2-1(F2), 1-3(F3)
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Next meeting: 2016/8/9 13:00  * [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5707|[2016.09.30] Measurements of BF LVDT Prototype]]
 * [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5099|[2016.11.15] Bottom filter optimal wight re-measurement]]
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= Type-A Meeting on 2016/7/26 =
2016/7/26 13:00 - 14:20 @Room210		 -----
== Electronics ==
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Participants: Takahashi, Ishizaki, Sato, Okutomi  * General
  * [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Subgroups/VIS/TypeA/DGSrack|DGS rack layout]]
  * [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Subgroups/VIS/TypeA/DGSchannel|ADC/DAC channel assignment]]
  * [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5193|List of drivers for VIS]]
  * [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=817|Lecture of Standalone Digital system for VIS]]
  * [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=1737|ADC board]]
  * [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=1736|DAC board]]
  * Quick information
   * ADC accepts +/- 10 V differential =
 * LVDT
  * [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=2826|LVDT Driver]]
  * [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=2117|LVDT-coil distributor]]
  * LVDT-coil combiner
 * Accelerometer
  * ACC driver
 * Geophone
  * [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=1466|Preamp circuit]]
 * Coil-magnet actuator
  * [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=3502|High power coil driver]]
  * [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=3506|Low power coil driver]]
 * Optical lever
  * QPD board
 * Stepper motor
  * Stepper motor driver
 * Picomotor
  * Picomotor driver
 * Cabling
  * [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=7587|In-Vacuum cables (hand made)]]
  * Type-A suspension cabling O4 [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=13378|<EX>]], [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=13375|<EY>]], [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=13404|<IX>]], [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=13406|<IY>]]
  * [[https://www.dropbox.com/sh/hkpunq1fjp7nduc/AAAzCL7GbeWAjGiGW8j3zDX2a?dl=0|Photos at installation (link to KAGRA dropbox)]]
  * [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Subgroups/VIS/TypeA/Feedthough|Cable assignment at feedthough and filter side]]
  * [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=9839|Result of continuity check and resistance measurement at installation]]
  * [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=11625|Pin assignment at feedthrough]]
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=== Minutes ===
 0-1 Assy. (Ishizaki)
  * The modeling of EQ stop was almost finished.
  * The model of chamber will be added to it.
 0-2 Simulation (Okutomi)
  * Calculated the effect due to actuation point for BF.
  * Noise will be induced to the actuators taking account of measured LVDT.
 1-1 Clean booth (FCL)
  * Design of suspended booth was shown.
  * The lighting is OK?
 3-2 Assembly of TF+IP (Sato)
  * Decision on the working place is under negosiation.
  * From August 30.
 3-5 ACC preparation (Sato)
  * Additional 3 sets will be taken by the end of July.
 4-2,3 Standard filter (Hirata)
  * The 4th set is on going.
 4-5 Procurement of damper magnet
  * Ordered.
 5-1 Manufacturing of blade (Takahashi)
  * Blades are in the thermal process.
 5-6 Design of damper (Sato)
  * Made drawings for LVDT prototype.
  * Make drawings for EQ stop side.
 5-8 Test of LVDT (Okutomi)
  * Set the sample from VIRGO in the 20m lab.
  * Making connector cables.
  * Micrometer stage and some jigs are necessary.
 6-1 Design of EQ stop (Ishizaki)
  * Made 3D model and 2D drawings.
  * Bottom support for the dummy payload is necessary.
  * Gap of the side stopper should be 10mm.
  * Adjustment of top ring position is not necessary.
 6-3 Test of prototype (Ishizaki)
  * Outer diameter of the plate was reduced on 20th.
 6-4 Design of release sensor (Sato)
  * The shape of jigs was modified with 30mm in height.
  * Gutter for cables is necessary.
 8-1 Design of dummy payload (Okutomi, Ishizaki)
  * The height was reduced.
 9-3 Cable assembly (Sato)
  * This task was postponed.
 9-6 Protection net (Okutomi)
  * The smallest bolt size was M3.
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Next meeting: 2016/8/1 13:00
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= Type-A Meeting on 2016/7/19 =
2016/7/19 13:00 - 15:00 @Room210		  -----
== Members of Type-A Team ==
 . Ryutaro TAKAHASHI (Leader)
 . Naohisa SATO
 . Lucia TROZZO
 . Yoshinori FUJII
 . Koki OKUTOMI
 . Hideharu ISHIZAKI
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Participants: Takahashi, Ishizaki, Sato, Okutomi(Skype) == Meeting ==
 * NAOJ VIS Meeting [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Subgroups/VIS/MeetingNAOJ|Minutes]]
 * Type-A team meeting [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Subgroups/VIS/TypeA/Meeting|Minutes]]
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=== Minutes ===
 0-1 Assy, (Ishizaki)
  * The plate for BF is in the center of cross tube.
 0-2 Simulation (Okutomi)
  * Calculate the effect due to actuation point for BF.
 2-3 Setting of cross chamber (VAC)
  * Remained horizontal deviation between the top flange on the cryostat and the top chamber was 1-4mm.
 3-2 Assembly of TF+IP (Sato)
  * The assembly work was rescheduled. From the end of August at the site.
 3-5 ACC preparation (Sato)
  * Additional 3 sets will be taken from NM1 in TAMA by the end of July.
  * ACCs will be calibrated at the site.
 4-2,3 Standard filter (Hirata)
  * 3 sets were finished.
 5-1 Manufacturing of blade (Takahashi)
  * Blades are in the thermal process.
 5-6 Design of damper (Sato)
  * Samples of LVDT have been delivered from VIRGO.
  * Design work is going.
 6-1 Design of EQ stop (Ishizaki)
  * Made 3D model and some 2D drawings.
  * Guide for lift down is necessary.
 6-3 Test of prototype (Ishizaki)
  * Outer diameter of the plate will be reduced on 20th.
 6-4 Design of release sensor (Sato)
  * Length of the present lead cable is too short. Longer ones will be prepared for actual setup.
 7-2 Long Maraging rod (Takahashi)
  * Rod for cryo-payload should be lift down at beginning and fixed on the protection net temporally.
 8-1 Design of dummy payload (Okutomi, Ishizaki)
  * Made drawings. The present design is too tall.
  * Confirm the height of mounted items.
 9-6 Protection net (Okutomi)
  * Check the small bolts size to decide the mesh of net.		 == See also ==
 * [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=4005|JGW-E1504005]]: VIS Document and Drawing Tree (Type-A)
 * [[https://www.dropbox.com/home|KAGRA Dropbox]] > [[https://www.dropbox.com/home/Subsystems|Subsystems]] > [[https://www.dropbox.com/home/Subsystems/VIS|VIS]] > [[https://www.dropbox.com/home/Subsystems/VIS/TypeA|TypeA]]
 * [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Subgroups/CRY|KAGRA/Subgroups/CRY]]
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Next meeting: 2016/7/26 13:00

= Type-A Meeting on 2016/7/12 =
2016/7/12 11:00 - 12:30 @Kashiwa

Participants: Takahashi, Ishizaki(Skype), Sato, Okutomi

=== Minutes ===
 0-2 Simulation (Okutomi)
  * The frequency shift was due to damping model.
  * Setting for GAS filters was corrected.
  * Going BF damping simulation by manual tuning.
  * Result will be reported by the VIS meeting.
 2-3 Setting of cross chamber (VAC)
  * Horizontal position of the top flange on the cryostat was different from the center of the top chamber by 25mm along beam axis.
 3-2 Assembly of TF+IP (Sato)
  * The place should be in the center room of KAGRA considering DGS setup.
 3-5 ACC preparation (Sato)
  * 6 sets of ACC were measured.
  * Additional 3 sets will be taken from NM1 in TAMA on 14th.
  * Tube for the spot cooler was set.
 4-2,3 Standard filter (Hirata)
  * 2 sets were finished.
 5-1 Manufacturing of blade (Takahashi)
  * Cutting of 22 blades was finished.
 5-6 Design of damper (Sato)
  * Original design from VIRGO does not fit to the space around BF.
  * The bending point is higher than the suspension point.
 6-1 Design of EQ stop (Ishizaki)
  * Made outer shape of end plate.
 6-3 Test of prototype (Ishizaki)
  * Assembling of the EQ stop prototype was started.
  * Thin dummy weights were prepared.
  * I-bolts on the plate were interfered with connection rods.
  * Outer diameter of the stop plate was larger than inner diameter of the frame lock.
 6-4 Design of release sensor (Sato)
  * 3 sensors were attached to the plate for the prototype test.
 8-1 Design of dummy payload (Okutomi, Ishizaki)
  * Circular type weight is suitable for combined dummy load.
  * Okutomi will send a cartoon soon.
 9-5 Installation
  * Protection for falling items is necessary. Check the small bolts size to decide the mesh of net.
  * Discuss on evacuation of the chamber.

Next meeting: 2016/7/19 13:00

= Type-A Meeting on 2016/7/5 =
2016/7/5 13:00 - 14:00 @Kamioka

Participants: Takahashi, Ishizaki, Sato, Okutomi

=== Minutes ===
 0-2 Simulation (Okutomi)
  * The frequency shift might be due to damping model.
  * Matlab model was remade.
  * Sensors and actuators were added to the BF stage.
 1-1 Clean Booth (FCL)
  * The booth will be ready in December.
 2-1 Setting of top chamber (VAC)
  * The schedule was shifted to December.
 2-3 Setting of cross chamber (VAC)
  * From 8th July, presence on 11th.
 3-2 Assembly of TF+IP (Sato)
  * The place should be considered again.
 3-5 ACC preparation (Sato)
  * 5 sets of ACC were measured.
 5-1 Manufacturing of blade (Takahashi)
  * Cutting of 12 blades was finished.
 5-2 Assembly of BF (Hirata)
  * Will be started in September.
 6-3 Test of prototype (Ishizaki)
  * The first setup and its procedure were shown.
  * Thin dummy weight and short hoock should be prepared.
  * Some cap screws on stop plates should be replaced to stop screws.
 6-4 Design of release sensor (Sato)
  * Under cable connection.
 8-1 Design of dummy payload (Okutomi, Ishizaki)
  * Interferometer test was canceld.
  * The EQ stop and the dummy payload should be ordered together in August.
 9-2 Transportation to 2F (Takahashi, Ishizaki)
  * Situation of the Y-end was investigated.
  * Maximum box width, which can go through the tunnel, was 1.5m.
  * Access road from Mozumi entrance was improved.
 9-3 Cable assembly (Sato)
  * Ask CRY number of cables.

Next meeting: 2016/7/12 11:00

= Type-A Meeting on 2016/6/28 =
2016/6/28 13:00 - 14:30 @The 4th meeting room

Participants: Takahashi, Ishizaki, Sato, Okutomi

=== Minutes ===
 0-1 Assembly model (Ishizaki)
  * Made the test setup.
 0-2 Simulation (Okutomi)
  * No progress. The results will be reported in the next VIS meeting.
 1-1 Clean Booth (FCL)
  * Present design: The booth is hung from the ceiling.
 2-3 Setting of cross chamber (VAC)
  * From 8th July, presence on 11th.
 3-5 ACC preparation (Sato)
  * Working space: The 20m lab was arranged on 27th.
 4-3 Standard filter (Hirata)
  * Assembly of FR and measurement: 1 set was finished.
 5-1 Manufacturing of blade (Takahashi)
  * Cutting: 6 blades by July + 6 blades by Sep.
 5-6 Design of damper (Sato)
  * Device: It is difficult to put the devices at the center of suspension point.
 6-1 Design of EQ stop (Ishizaki)
  * Modeling: 3D model for the test setup was built.
 6-3 Test of prototype
  * Frame lock, extension rods, adjusters were delivered.
  * Hoist's tool will be necessary.
  * Test items related to the frame design have high priority. Target date is 22th July.
 6-4 Design of release sensor (Sato)
  * Bases and shims were delivered.
  * Plate additional machining: Delivery on 29th.
  * Circuit: LED box was made. Cabling has not been applied yet.
 8-1 Design of dummy payload (Okutomi, Ishizaki)
  * Cartoon: Okutomi should send to Ishizaki soon!
 9-1 Establishment of procedure (Takahashi, Okutomi)
  * Test plan is made parallel with test work. Check the list of test items.
 9-2 Transportation to 2F (Takahashi, Ishizaki)
  * Situation of the site will be checked in 5-7th July.
  * Electric crawler is limitted, for example, for 200kg load.
 9-3 Cable assembly (Sato)
  * Number of cables: CRY will decide it by the end of June.

Next meeting: 2016/7/5 13:00

= Type-A Meeting on 2016/6/21 =
2016/6/21 13:00 - 14:00 by Skype

Participants: Takahashi, Ishizaki, Sato

=== Minutes ===
 0-1 Assembly model (Ishizaki)
  * Made the test setup.
 0-2 Simulation (Okutomi)
  * Deadline: The end of June
 2-3 Setting of cross chamber (VAC)
  * Work: From 8th July, presence on 11th.
 3-5 ACC preparation (Sato)
  * Make working space in the 20m lab on 27th June.
 4-3 Standard filter (Hirata)
  * Assembly of FR and measurement: by August for 6 sets.
 4-5 Procurement of magnets (Takahashi)
  * Size: 13mm, 72PSC for each
 5-1 Manufacturing of blade (Takahashi)
  * Cutting: 6 blades by July + 6 blades by Sep.
 5-6 Design of damper (Sato)
  * Device: The last one was too small, actually about 125mm. Design for vertical as well.
 6-1 Design of EQ stop (Ishizaki)
  * Modeling: 3D model for the test setup was build.
 6-3 Test of prototype
  * Frame lock: Delivered by 24th.
  * Other parts (rod, adjuster, bolts) will be ordered.
 6-4 Design of release sensor (Sato)
  * Base: Making in ATC.
  * Plate additional machining: Ordered.
  * Circuit: LED will be tested.
 8-1 Design of dummy payload (Okutomi, Ishizaki)
  * Cartoon: Okutomi should send to Ishizaki soon!
  * Mirror holder: Refer the mirror box for PR.
 9-1 Establishment of procedure (Takahashi, Okutomi)
  * Test plan: Check FR for 2 BFs.
 9-3 Cable assembly
  * Number of cables: Thermocouples are added. Ask Tomaru total number.

Next meeting: 2016/6/28 13:00

= Type-A Meeting on 2016/6/14 =
2016/6/14 13:00 - 15:00 @ Room 210

Participants: Takahashi, Ishizaki, Sato, Okutomi

=== Minutes ===
 0-1 Assembly model (Ishizaki)
  * Step: From EQ stop, next with chamber.
 0-2 Simulation (Okutomi)
  * Problem: Conversion to Simulink was ok. The structure of control has a problem in Matlab. Reconstructing now.
 3-5 ACC preparation (Sato)
  * Space: Make working space in the 20m lab.
 5-1 Manufacturing of blade (Takahashi)
  * Design: 5 blades are used for 200kg load.
 5-6 Design of damper (Sato)
  * Device: Asking design of LVDT-Act. to VIRGO. The device is located at the center of mass.
 6-1 Design of EQ stop (Ishizaki)
  * Structure analysis: Two cases were calculated. Share stress was 1/6 of limit, and principal stress was 1/7 of limit respectively in the maximum case.
  * Modeling: Making with consideration of procedure and tools.
  * Frame lock: Maximum stress was 160MPa with thickness of 30mm (limit 180MPa).
 6-4 Design of release sensor (Sato)
  * Position: Inner side of the stage. Need to addtional machining to the EQ stop plate.
  * Electronics: Circuit is simple in the test (handmade).
 8-1 Design of dummy payload (Okutomi, Ishizaki)
  * Condition: 25cm mirror, alignment by moving mass. Make a cartoon.
  * Actuation: Length control is necessary? Check PZT actuator.
 9-1 Establishment of procedure (Takahashi, Okutomi)
  * Test plan: Prepare for 2 sets of release sensors. Check FR for 2 BFs.

Next meeting: 2016/6/21 13:00		 <<Navigation(children)>>

Information of the Type-A Seismic Attenuation System (SAS). This page wants information about not only room-temperature parts but also cryogenic vibration isolation system.

Status

Contents

  1. Status
  2. Drawings
    1. Tower
    2. Cryogenic Payload
  3. Documents
    1. Reports
    2. Installation Procedure
    3. Measurement and Analysis
  4. Electronics
  5. Members of Type-A Team
  6. Meeting
  7. See also

TypeAoverview TypeAdesign

Drawings

  • Type-A SAS whole assy
  • Vacuum chamber

Tower

Cryogenic Payload

  • Cryo-Payload assy
  • Platform (PF)
  • Marionette (MT)
  • Marionette Recoil Mass
  • Intermediate Mass (IM)
  • Intermediate Recoil Mass
  • Test Mass (TM) - Sapphire Mirror
  • Recoil Mass
  • Heat link
    • Heat link suspension

Documents

Reports

Installation Procedure

Measurement and Analysis

Electronics

Members of Type-A Team

  • Ryutaro TAKAHASHI (Leader)
  • Naohisa SATO
  • Lucia TROZZO
  • Yoshinori FUJII
  • Koki OKUTOMI
  • Hideharu ISHIZAKI

Meeting

See also

/DGSchannel   /DGSrack   /ETMX   /ETMY   /Feedthough   /ITMX   /ITMY   /Meeting   /WorkingLog   /WorkingLog/dir_information  

KAGRA/Subgroups/VIS/TypeA (last edited 2021-11-02 17:29:27 by naohisa.sato)