• KAGRA
• Subgroups
• VIS
• TypeA
• Meeting

Type-A Meeting on 2018/4/3

2018/4/3 13:00 - @Kamioka

Participants: Takahashi, Sato, Ishizaki, Okutomi

Minutes

X-front

• Repairing of F3
• Mounting of F1 with the wire again
• Cabling between the F2 and the F1 again
• Tuning of F1
• Lifting down of F2

X-end

• Fastening of bolts for the chamber

Type-A Meeting on 2018/3/27

2018/3/27 13:00 - @Kamioka

Participants: Takahashi, Sato, Ishizaki, Okutomi

Minutes

X-front

• Cabling in F1
• Mounting of F1 with the wire
• Tuning of F1
• Cabling between the F2 and the F1
• Lifting down of F2

X-end

• 3/26-27: Adjustment of height of the filters

Type-A Meeting on 2018/3/20

2018/3/20 12:40 - @Kamioka

Participants: Takahashi, Sato, Ishizaki

Minutes

X-front

• Lift down the F3
• Go to the F1 stage (FR, small hexagon, receptacle)

X-end

• 3/19: Pushing down of keystone in the TF
• 3/20: Connection of cables
• 3/21: Hanging of CP

Type-A Meeting on 2018/3/14

2018/3/14 12:40 - @Kamioka

Participants: Takahashi, Sato

Minutes

X-front

• Tuning of F2
• Check of FR
• Cabling around F2 and check of connection
• Prearation of F1
• Lifting down of F3

X-end

• 3/19: Pushing down of keystone in TF
• 3/20: Hanging of CP
• 3/21: Connection of cables

Type-A Meeting on 2018/3/5

2018/3/5 13:20 - @Kamioka

Participants: Takahashi, Sato, Okutomi

Minutes

X-front

• F3 stage (Transfer function, Test of SM).
• Preparation for the F2 (end plate、side stopper、side plate、small hexagon、cables).

X-end

• 3/5: Measured chamber height. Vented, Open chamber
• 3/6: Dismount DP
• 3/7: Install wire with cabling

Y-end

• Under cooling.

Type-A Meeting on 2018/2/27

2018/2/27 12:40 - @Kamioka

Participants: Takahashi, Sato, Ishizaki, Okutomi

Minutes

X-front

• F3 stage (Cabling, Tuning again, Transfer function, Test of SM).
• Preparation for the F2.

X-end

• ~3/5: Okutomi experiments
• 3/5: Measure chamber height. Start vent
• 3/6: Open chamber, Dismount DP
• 3/7~: Start cabling

Y-end

• Under cooling.

Type-A Meeting on 2018/2/20

2018/2/20 13:00 - @Kamioka

Participants: Takahashi, Sato, Ishizaki, Okutomi

Minutes

X-front

• Add FR blade. Tune the BF again.
• Go to the F3 stage (F1 tuning, cabling).

X-end

• ~3/2: Okutomi experiments
• 3/5: Measure chamber height. Start vent
• 3/6: Open chamber, Dismount DP
• 3/7~: Start cabling

Y-end

• Under cooling.

Type-A Meeting on 2018/2/13

2018/2/13 13:00 - @Kamioka

Participants: Takahashi, Ishizaki, Sato, Okutomi

Minutes

X-end

• ~3/2: Okutomi experiments
• 3/2: Start vent
• 3/5-6: Open chamber, Dismount DP
• 3/7~: Start cabling

Y-end

• Under cooling. Keep monitoring.

X-front

• Short rod was delivered.
• Install DP and BF.
• Prepare for LVDT driver. Use temporary power supply.
• Prepare for SM driver.
• Start assembly of F3 stage (connector plates, small hexagon, ...)
• Ordered additional FR parts. Delivery will be on 2/19.
• Check strength of FR blade.

Type-A Meeting on 2018/1/16

2018/1/16 13:00 - @Kamioka

Participants: Takahashi, Ishizaki, Sato, Okutomi

Minutes

X-end

• Solved some problems (coil driver for BF damper, vacuum gauge).

Y-end

• Checked the connector at BF.
• Preparation for evacuation (1/17 12:30 Meeting).
• Evacuation will be started in the 19th morning.

X-front

• Start the assembly of DP.
• Open the top chamber.
• Combine the PI for SRM.

Procurement

• PTFE cabels was delivered.
• Ballast ring will be delivered on 22nd.
• Hand pallet was ordered.

Type-A Meeting on 2018/1/9

2018/1/9 13:00 - @Kamioka

Participants: Takahashi, Ishizaki, Sato, Okutomi

Minutes

X-end

• Leak point check.
• Transportation (Footholds, chain blocks)

Y-end

• Preparation for evacuation (1/10 12:30 Meeting)
• Transportation (Protection net, DP)

Center

• Top chamber open (dry air is necessary)
• Transportation to 2F (from needed items)
• Assembly of PI for IXV, IYV, SRM.

Procurement

• Peek Dsub connectors
• Short rod for DP

Type-A Meeting on 2017/11/7

2017/11/7 13:00 - @NAOJ

Participants: Takahashi, Ishizaki, Sato, Okutomi

Minutes

Status

• Control test in X-end: Measurement of TFs was finished. Damping test is planed.
• Assembly of BFs: Finished and shipped from the clean room. FRs for SF will be assembled.
• Preparation of ACCs: Six units are available. One driver needs to be modified.

Schedule

• Gantt chart

• 11/13 Shipping in Akeno and Mitaka. Preparation for the center area.
• 11/14 Delivery in Kamika at 9:00. Transortation of the bridge frame.
• 11/17 Lifting of the items by MESCO.
• 11/15-17 Replacement of cables in X-end.
• 11/27-28 Connection to the cryo-payload in Y-end. Check the delivery of rods and junction boxes.
• Assembly of the pre-isolator for SRM is postponed to December.

Procurement

• PEEK Dsub connector (Takahashi), ordered
• Receptacle (Takahashi), ordered
• Small hexagon (Takahashi), ordered
• Counter weight (Takahashi)
• Stepping motor (Takahashi)
• Cable assembly (Sato)
• Bottom anchor (Sato)
• ACC adapter (Sato), ordered
• Touch sensor (Sato), ordered
• Rack (Ishizaki), order on 11/13
• Collar (Sato)

Next meeting: 2017/11/14 13:00

Type-A Meeting on 2017/10/31

2017/10/31 13:00 - 13:30 @NAOJ

Participants: Takahashi, Ishizaki, Sato, Okutomi

Minutes

Status

• Control test in X-end: Start evacuation on 11/1.
• Assembly of BFs: Finish on 10/31, shipping is within this week,
• Preparation of ACCs: 6 units are working, some modification for the drivers are going.

Schedule

• Gantt chart

• 11/13 Shipping in Akeno and Mitaka.
• 11/14 Delivery in Kamika at 9:00, Preparation for the center area, Transortation of the bridge frame.
• 11/17 Lifting of the items by MESCO
• Assembly of the pre-isolator for SRM is postponed to December.

Procurement

• PEEK Dsub connector (Takahashi)
• Receptacle (Takahashi)
• Small hexagon (Takahashi)
• Counter weight (Takahashi)
• Stepping motor (Takahashi)
• Cable assembly (Sato)
• Bottom anchor (Sato)
• ACC adapter (Sato)
• Touch sensor (Sato)
• Rack (Ishizaki)
• SUS sheets (Ishizaki)

Next meeting: 2017/11/7 13:00

Type-A Meeting on 2017/1/17

2017/1/17 13:00 - 14:00 @Kamioka

Participants: Takahashi, Ishizaki, Sato, Okutomi

Minutes

• 0-2 Simulation (Okutomi)
  • Report was postponed to the next meeting.
  2-1 Setting of top chamber (VAC)
  • Top chamber was disconnected to repare the leaked part.
  3-2 Assembly of TF+IP (Sato)
  • It was expensive to make new boxes for packing the pre-isolators. We reuse the boxes for IP,
  • Will be removed from the large clean room on 23rd.
  3-6 Procurement of counter weight (Takahashi)
  • Will be delivered on 18th.
  5-7 Procurement of BF damper (Sato)
  • Will be delivered on 20th.
  9-3 Cable assembly (Sato)
  • Plan of cable arrangement was shown.
  • Still discussing about tagging.
  9-9 Procurement of handling tool (Ishizaki)
  • Start from covering the floor by stainless steel sheet.
  9-10 Procurement of other tools (Sato)
  • Send small tools used in ATC.

Next meeting: 2017/1/24 13:00

Type-A Meeting on 2017/1/10

2017/1/10 13:30 - 14:30 @Kamioka

Participants: Takahashi, Ishizaki, Sato, Okutomi

Minutes

• 0-2 Simulation (Okutomi)
  • Report was postponed to the next meeting.
  2-1 Setting of top chamber (VAC)
  • EYV system will be vented in this week.
  3-2 Assembly of TF+IP (Sato)
  • Asking a quotation of modified parts for yaw motor slider.
  • Asking a quotation of boxes to pack the pre-isolators.
  3-6 Procurement of counter weight (Takahashi)
  • Will be delivered on 18th.
  5-7 Procurement of BF damper (Sato)
  • Will be delivered on 20th. About 10 secondary coils come later.
  6-2 Procurement of EQ stop (Ishizaki)
  • Order spare M12 stop screws.
  7-2 Procurement of long maraging rod (Takahashi)
  • Aging for 3.3m rod is not available.
  9-2 Transportation to 2F (Takahashi)
  • The second transportation for EQ stop parts and tools is scheduled in 10-11th from Mitaka to Kamioka by Kamoshida, on 12th to Y-end by Kamioka-kogyo, and on 13th to 2F by MESCO in January.
  9-9 Procurement of handling tool (Ishizaki)
  • Stainless sheets were delivered.
  9-10 Procurement of other tools (Sato)
  • Send small tools used in ATC.

Next meeting: 2017/1/17 13:00

Type-A Meeting on 2016/12/27

2016/12/27 13:00 - 14:30 @Room 210

Participants: Takahashi, Ishizaki, Sato, Okutomi

Minutes

• 0-1 Assy. (Ishizaki)
  • Tomograph is necessary.
  0-2 Simulation (Okutomi)
  • Designed control model will be reported in the next meeting.
  2-1 Setting of top chamber (VAC)
  • The top chamber was connected on 20th. The piston system was modified, so the pre-isolator was not installed. Two cross tubes were assembled.
  3-2 Assembly of TF+IP (Sato)
  • Assembly of two TFs for SR was finished.
  • Stepping motors for yaw will be assembled later.
  • A small crack was found on the blade. The plating has come off?
  5-8 Test of LVDT-ACT (Okutomi)
  • Tested a combiner prototype. We asked AEL group the combiner modules with the tested parameter.
  6-1 Design of EQ stop (Sato)
  • Design of bottom anchor was approved. Ask companies a quotation.
  6-2 Procurement of EQ stop (Ishizaki)
  • Checked delivered parts at the site on 22nd.
  9-2 Transportation to 2F (Takahashi)
  • The second transportation for EQ stop parts and tools is scheduled in 10-11th from Mitaka to Kamioka by Kamoshida, on 12th to Y-end by Kamioka-kogyo, and on 13th to 2F by MESCO in January.
  • Prepare the shipping on 4-5th January.
  9-6 Procurement of protection net (Takahashi)
  • Ordered the net and the frame.
  9-7 Procurement of hoist tool (Ishizaki)
  • Delivered.
  9-8 Procurement of foot hold (Ishizaki)
  • All of parts were delivered.
  9-9 Procurement of handling tool (Ishizaki)
  • Extensions and stainless sheet are necessary.
  9-10 Procurement of other tools (Sato)
  • Make a wire cramp for cryo-payload.
  • Order the fiber scope.
  • List up small tools.

Next meeting: 2017/1/10 13:00

Type-A Meeting on 2016/12/13

2016/12/13 13:00 - 15:00 @Room 210

Participants: Takahashi, Ishizaki, Sato, Okutomi

Minutes

• 0-2 Simulation (Okutomi)
  • Making the model for the digital control.
  2-1 Setting of top chamber (VAC)
  • Connection of the top chamber is scheduled in 21st-22nd. TMP, cone bellows, feedthroughs, and cross tubes will be assembled.
  3-2 Assembly of TF+IP (Sato)
  • Started assembly of TFs for SR.
  • IPs for SR will be moved to the clean room on 13th.
  5-5 Transportation of BF (Hirata)
  • Two BFs were transported to Kamioka with the IPs.
  5-7 Procurement of damper (Sato)
  • Magnets were delivered.
  6-1 Design of EQ stop (Sato)
  • Design of bottom anchor was shown. 4 brackets prop up the wall of chamber.
  6-2 Procurement of EQ stop (Ishizaki)
  • Remain parts were delivered on 12th.
  7-3 Design of support for long maraging rod (Sato)
  • The cramp was ordered.
  9-2 Transportation to 2F (Takahashi)
  • IP, Filters, and EQ stop parts were transported in 7-8th.
  • The second transportation was scheduled in 10-11th for Kamioka and 12-13th for Y-end in January.
  9-3 Cable assembly (Sato)
  • The idea of cable tag was shown. Al plate with tag is fixed to each cable by PEEK filament.
  9-7 Procurement of hoist tool (Ishizaki)
  • Pre-assembly of parasol was tried.
  9-9 Procurement of foot hold (Ishizaki)
  • The bridge was ordered. The parts were delivered on 13th.
  9-10 Procurement of other tools (Sato)
  • The company people on the fiber scope will come to NAOJ on 14th.

Next meeting: 2016/12/27 13:00

Type-A Meeting on 2016/11/29

2016/11/29 13:00 - 14:30 @Room 210

Participants: Takahashi, Ishizaki, Sato

Minutes

• 2-1 Setting of top chamber (VAC)
  • TMP comes from NAOJ. It will be attached on 21st December.
  3-3 Cable connection of PI (Sato)
  • 4x2 stepping motors were checked.
  • Connection of LVDT for one set of IP was ok.
  • Primary coil for vertical of the other set has disconnection.
  • Packing of two PIs is on 30th.
  • Shipping is on 1st December. Ishizaki will receive them on 2nd at the KAGRA site.
  5-5 Transportation of BF (Hirata)
  • Two BFs will be transported with IPs.
  5-7 Procurement of damper (Sato)
  • Magnets should be ordered.
  6-2 Procurement of EQ stop (Ishizaki)
  • Some parts have been delivered on 17th. Remain parts will be delivered on 12th December.
  7-2 Procurement of Maraging rod (Takahashi)
  • Ordered. The first set will be delivered by 20th January. The installation is started on 25th.
  7-3 Design of support for long maraging rod (Sato)
  • Found small clamp for the damper wire.
  • Ask companies a quotation.
  9-2 Transportation to 2F (Takahashi)
  • The first transportation is scheduled in 7-10th December.
  • The second transportation is scheduled after 10th January.
  9-7 Procurement of hoist tool (Ishizaki)
  • The parts will be delivered. We need pre-assembly for receiving inspection.
  9-9 Procurement of foot hold (Ishizaki)
  • Design of bridge was fixed.
  9-10 Procurement of other tools (Sato)
  • Ask the company about focus length of the fiber scope.

Next meeting: 2016/12/6 13:00

Type-A Meeting on 2016/11/22

2016/11/22 10:00 - 11:30 @Room 210

Participants: Takahashi, Ishizaki, Sato

Minutes

• 0-2 Simulation (Okutomi)
  • (to be reported)
  1-1 Clean Booth (FCL)
  • Cleaning will be finished by 6th December.
  3-2 Assembly of TF+IP (Sato)
  • Shipping of two PIs is scheduled on 1st December. Ishizaki will receive them on 2nd at the KAGRA site.
  • Two sets for SR was transported from Akeno on 21st.
  3-6 Production of counter weight (Takahashi)
  • On going.
  5-5 Transportation of BF (Hirata)
  • Two BFs will be transported with IPs.
  5-7 Procurement of damper (Sato)
  • Fixed the drawings for the coil bobbin.
  7-2 Procurement of Maraging rod (Takahashi)
  • One set of receptacles will be manufactured as new ones.
  7-3 Design of support for long maraging rod (Sato)
  • Set collar is useful for center wire.
  • It is necessary to hold the load of 7-8kg.
  9-2 Transportation to 2F (Takahashi)
  • Divided the transportation by the company by 2 times.
  • PIs will be transported after 10th December.
  9-3 Cable assembly (Sato)
  • Only tube of connection pin is necessary.
  9-7 Procurement of hoist tool (Ishizaki)
  • Parasol is independent in the frame order.
  9-9 Procurement of foot hold (Ishizaki)
  • Bridge consists of Misumi frame.
  9-10 Procurement of other tools (Ishizaki)
  • Some ideas on fiber scope were shown by Sato.

Next meeting: 2016/11/29 13:00

Type-A Meeting on 2016/11/15

2016/11/15 13:00 - 14:30 @Room 210

Participants: Takahashi, Ishizaki, Sato, Okutomi

Minutes

• 0-1 Assy. (Ishizaki)
  • Inconsistency of 1mm in the total length of EQ stop was solved.
  0-2 Simulation (Okutomi)
  • Sharing the parameters with Miyamoto by Google spreadsheet.
  • Made the real time model, but not "make" and "build" yet.
  • Made master model of PI and GASF for Type-B.
  3-2 Assembly of TF+IP (Sato)
  • Next work is on 16th.
  • Shipping of two PIs was scheduled on 1st December. Ishizaki will receive them on 2nd at the KAGRA site.
  • Two sets for SR will be transported from Akeno on 21st.
  3-5 ACC preparation (Sato)
  • Measurements of 6 units were finished. 2 of 6 have low performance.
  • Measurements of remained 3 units are postponed.
  3-6 Production of counter weight (Takahashi)
  • On going.
  5-5 Transportation of BF (Hirata)
  • Two BFs were packed. They will be transported with IPs.
  5-7 Procurement of damper (Sato)
  • Open bidding was on 9th.
  • There is a meeting with the company on 15th.
  6-3 Test of EQ stop prototype (Ishizaki)
  • Pending.
  6-4 Design of release sensor (Sato)
  • Consulted on interface with AEL members.
  6-5 Procurement of release sensor (Sato)
  • The sensors were delivered.
  7-3 Design of support for long maraging rod (Takahashi)
  • It is difficult to keep high tension.
  • Think a clamp so that it can keep the position without slip down.
  9-1 Document of procedure (Takahashi)
  • The review was held on 4th.
  9-2 Transportation to 2F (Takahashi)
  • Asking a company transportation to the Y-end during 7-13th December.
  9-6~10 Procurement of tools (Ishizaki)
  • Footholds, table, chain blocks, and lifter will be ordered soon.
  • Still asking some companies a quotation for the hoist tool.

Next meeting: 2016/11/22 10:00

Type-A Review on 2016/11/4

http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5855

Type-A Meeting on 2016/11/1

2016/11/1 13:00 - 13:30 @Room 210

Participants: Takahashi, Ishizaki, Sato, Okutomi

Minutes

• 0-1 Assy. (Ishizaki)
  • Updated 2D assy. drawings. The total length of EQ stop is inconsistent by 1mm.
  0-2 Simulation (Okutomi)
  • Make digital control model of Type-A system.
  3-2 Assembly of TF+IP (Sato)
  • New bolts for the yoke were delivered.
  • The top filter was mounted onto the IP.
  • The shaft screw of motor was not matching to the slider for fishing rod. New shafts were delivered.
  • LVDT driver and DC power supply are necessary.
  3-5 ACC preparation (Sato)
  • Next measurements is planed on 7-9th.
  5-5 Transportation of BF (Hirata)
  • Packing of two BFs was postponed.
  5-7 Procurement of damper (Sato)
  • Open bidding is on 9th.
  7-2 Procurement of Maraging rod (Takahashi)
  • Asking the company a quotation.
  9-1 Document of procedure (Takahashi)
  • The review is held on 4th. Draft document was previewed and discussed.
  9-2 Transportation to 2F (Takahashi)
  • Transportation to Kamioka is on 25th.
  • Transportation to the Y end is on 30th.
  9-6~10 Procurement of tools (Ishizaki)
  • Go to the order after the review.

Next meeting: 2016/11/15 13:00

Type-A Meeting on 2016/10/25

2016/10/25 13:00 - 14:00 @4th meeting room

Participants: Takahashi, Ishizaki, Sato, Okutomi

Minutes

• 0-1 Assy. (Ishizaki)
  • Made 2D assy. drawings (cross section).
  0-2 Simulation (Okutomi)
  • Make Type-B model too.
  1-1 Clean Booth (FCL)
  • Finish the construction and cleaning by the end of November.
  2-1 Setting of top chamber (VAC)
  • Leak test is planed from 13th to end in December.
  3-2 Assembly of TF+IP (Sato)
  • Magnets were replaced.
  • Broken bolts were removed. Ordered new bolts.
  • If the bolts arrived, go to assembly on 26th.
  3-5 ACC preparation (Sato)
  • The results of measurement for 3 ACCs at the KAGRA site should be reported on 28th.
  • Next measurements is planed on 7-9th in November.
  5-5 Transportation of BF (Hirata)
  • Pack two BFs on 26th.
  5-7 Procurement of damper (Sato)
  • Proposal was submitted. It will be circulated.
  5-8 Test of LVDT (Okutomi)
  • Design combiner by the end of November.
  6-3 Test of prototype (Ishizaki)
  • If no assembly work for pre-isolaotr, go to test on 26th.
  7-2 Procurement of Maraging rod (Takahashi)
  • Hirata is making 2D drawings.
  9-1 Document of procedure (Takahashi)
  • The review is held on 4th November. Make drawings for the document.
  9-2 Transportation to 2F (Takahashi)
  • T3 is available in arm.
  • Cover items at for passing through IYC and EYC.
  9-7 Procurement of hoist tool (Ishizaki)
  • Consulting with a company. It is difficult to use polycarbonate sheet of 2mm.
  9-9 Procurement of handling tool (Ishizaki)
  • Kimura-san will order the floor plate around cross tube.
  • Price of hand lifer made of stainless steel is more than 0.3MYen.
  9-10 Procurement of other tools (Ishizaki)
  • Fiber scope is useful, but the size is limited.

Next meeting: 2016/11/1 13:00

Type-A Meeting on 2016/10/18

2016/10/18 13:00 - 14:30 @Room 210

Participants: Takahashi, Ishizaki, Sato, Okutomi

Minutes

• 0-1 Assy. (Ishizaki)
  • Made 2D assy. drawings (cross section).
  0-2 Simulation (Okutomi)
  • Had the workshop with Miyamoto on 6-8th. Made the model including the cryo-payload.
  2-2 Procurement of cone bellows (Takahashi)
  • Delivered.
  3-2 Assembly of TF+IP (Sato)
  • IP and TF were carried into the clean room in 6-7th.
  • Poles to support upper TF were collapsed in the box. Some screws and magnets for york are broken.
  • Started assembly of pre-isolator on 19th.
  3-5 ACC preparation (Sato)
  • Measured the sensitivity of 3 ACCs at the KAGRA site in 12-14th.

  • Measured sensitivities were 10^-10~10-9m/rtHz.

  5-2 Assembly of BF (Hirata)
  • Finished the assembly of two BFs. They will be packed on 26th.
  5-7 Procurement of damper (Sato)
  • The bidding was announced on 14th. Open bidding is on 9th November.
  5-8 Test of LVDT (Okutomi)
  • Designing combiner.
  6-5 Procurement of release sensor (Sato)
  • Ordered.
  7-2 Procurement of Maraging rod (Takahashi)
  • Asked ATC redesign of the head with safety margin of 2.
  • Hirata is making 2D drawings.
  9-1 Document of procedure (Takahashi)
  • The review is held on 4th November.
  9-7 Procurement of hoist tool (Ishizaki)
  • Designed the hoist tool using 500kg chain blocks. Consult with a company.
  9-8 Procurement of foot hold (Ishizaki)
  • Order 3 (high) and 2 (low) sets of foot hold.
  9-9 Procurement of handling tool (Ishizaki)
  • Kimura-san is considering floor plate around the cross tube.
  • Total load for the floor comes from the weight of carry lifter and dummy payload.
  9-10 Procurement of other tools (Ishizaki)
  • Consider lope to avoid falling tools.
  • Sato suggested cable tab.

Next meeting: 2016/10/25 13:00

Type-A Meeting on 2016/10/4

2016/10/4 13:00 - 14:30 @Room 210

Participants: Takahashi, Ishizaki, Sato, Okutomi

Minutes

• 0-1 Assy. (Ishizaki)
  • Adding F1 damper and IP base.
  0-2 Simulation (Okutomi)
  • The work with Miyamoto is planed in 6-8th.
  3-1 Transportation of IP and TF (Takahashi)
  • Held on 3rd. Used the fork lift.
  3-2 Assembly of TF+IP (Sato)
  • Inspection of crane in the large clean room is held on 5th.
  • Carry IP and Tf into the clean room in 6-7th.
  3-5 ACC preparation (Sato)
  • Final test is planed at the KAGRA site on 12-14th.
  • Drivers and additional 3 units should be sent within this week.
  5-2 Assembly of BF (Hirata)
  • Assembling the 2nd unit.
  5-7 Procurement of damper (Sato)
  • Asking quotation. Some questions are coming from the company.
  5-8 Test of LVDT (Okutomi)
  • Test report was uploaded.
  6-2 Procurement of EQ stop (Ishizaki)
  • Need holes for cables on the shild plate.
  6-3 Test of prototype (Ishizaki)
  • The next test will be held on 5th.
  6-5 Procurement of release sensor (Sato)
  • Order soon.
  7-2 Procurement of Maraging rod (Takahashi)
  • We concluded that the load during crane operation is not over 2G.
  • We should take care of misoperation.
  9-1 Document of procedure (Takahashi)
  • The review is scheduled in early November.
  9-2 Transportation to 2F (Takahashi)
  • Crawler was prepared at the site.
  9-7 Procurement of hoist tool (Ishizaki)
  • Designing now.

Next meeting: 2016/10/18 13:00

Type-A Meeting on 2016/9/20

2016/9/20 13:00 - 14:30 @4th meeting room

Participants: Takahashi, Ishizaki, Sato, Okutomi

Minutes

• 0-1 Assy. (Ishizaki)
  • Adding the model of BF damper and replacing the model of BF by Hirata.
  • Asking the company the model of IP base.
  0-2 Simulation (Okutomi)
  • The next meeting with Miyamoto has not been scheduled yet.
  3-1 Transportation of IP and TF (Takahashi)
  • Akeno on 3rd October.
  3-2 Assembly of TF+IP (Sato)
  • The place became the large clean room in ATC.
  • Access from the east door of TMT building is available.
  3-5 ACC preparation (Sato)
  • Final test is planed at the KAGRA site on 28-30th.
  5-7 Procurement of damper (Sato)
  • Making the specification document. Add inspection items, baking, S/N, gluing.
  5-8 Test of LVDT (Okutomi)
  • Measured the actuator Efficiency: 76mN/A.
  • Measured the position dependence of the efficiency.
  • Thermal load of 1W is predicted. PEEK is still acceptable.
  6-2 Procurement of EQ stop (Takahashi)
  • Had kick off meeting with the company person on 16th.
  • Length of rods was changed.
  6-3 Test of prototype (Ishizaki)
  • Tuned the weight of dummy payload for BF.
  • The next test will be held in October.
  6-5 Procurement of release sensor (Sato)
  • Ask quotation.
  7-2 Procurement of Maraging rod (Takahashi)
  • The safety margin in Virgo was 2.
  • Show head size roughly.
  9-7 Procurement of hoist tool (Ishizaki)
  • Start design.
  9-8 Procurement of foot hold (Ishizaki)
  • Short holds (~1m) are necessary too.

Next meeting: 2016/10/4 13:00

Type-A Meeting on 2016/9/13

2016/9/13 13:00 - 14:30 @Room210

Participants: Takahashi, Ishizaki, Sato, Okutomi

Minutes

• 0-1 Assy. (Ishizaki)
  • Made assy. model with the chamber. Add the IP base to the mode.
  0-2 Simulation (Okutomi)
  • Making a model of cryo-payload independently.
  1-1 Clean booth (FCL)
  • Cleaning around EYV will be started on 5th December.
  3-2 Assembly of TF+IP (Sato)
  • The place has not decided yet.
  3-5 ACC preparation (Sato)
  • Measured additional 3 units. The last i unit has a different connector.
  5-2 Assembly of BF (Hirata)
  • Started on 7th.
  5-6 Design of damper (Sato)
  • Made the drawings of parts. Make assy. drawings.
  • Showed design of the cabling and the connector plate.
  • The 1st specification document should be prepared by 16th.
  5-8 Test of LVDT (Okutomi)
  • Set up the bench for actuator test using damping rods and an acrylic table.
  • Measured the LVDT. Efficiency: 575V/m, Sensitivity: 10^-8m/rtHz
  6-2 Procurement of EQ stop (Takahashi)
  • Open bidding is on 13th.
  6-3 Test of prototype (Ishizaki)
  • The next setup consists of SF-BF-DP with M12 receptacle.
  • The work is planed on 14th.
  6-5 Procurement of release sensor (Sato)
  • Ask quotation for sensors with short cable.
  7-2 Procurement of maraging rod (Takahashi)
  • New design and test for strength is on going.
  • CFRP is available as material?
  9-8 Procurement of foot hold (Ishizaki)
  • Considering the type used in ATC, which is ready made and folded.

Next meeting: 2016/9/20 13:00

Type-A Meeting on 2016/9/6

2016/9/6 13:00 - 14:00 @Room310

Participants: Takahashi, Ishizaki, Sato, Okutomi

Minutes

• 0-1 Assy. (Ishizaki)
  • This is the first priolity.
  0-2 Simulation (Okutomi)
  • Consulted with Miyamoto at Hongo on 1st. The information was shared.
  • Make a model of cryo-payload independently, and compare each other.
  2-1 Setting of top chamber (VAC)
  • It is difficult to insert the cone bellows later.
  • The pre-isolator will be put on the cone bellows at the time of leak test.
  3-2 Assembly of TF+IP (Sato)
  • The place has not decided yet. Scheduling is pending.
  3-5 ACC preparation (Sato)
  • Other 3 units were taken on 31st.
  5-1 Manufacturing of blade (Takahashi)
  • Ni plating was finished. Some blades were lusterless. They will be plated again.
  5-2 Assembly of BF (Hirata)
  • From 7th.
  5-6 Design of damper (Sato)
  • The support for primary coil and the hole position in coil bobbin will be modified.
  5-8 Test of LVDT (Okutomi)
  • Coil winding and assembly of the prototype was finished.
  • The test will be started in this week.
  6-1 Design of EQ stop (Ishizaki)
  • The length of rods was changed.
  6-2 Procurement of EQ stop (Takahashi)
  • Open bidding will be on 13th.
  6-3 Test of prototype (Ishizaki)
  • The next setup consists of SF-BF-DP with M12 receptacle.
  • It is necessary to disassemble the EQ stop once. The work is planed on 7th.
  6-5 Procurement of release sensor (Sato)
  • Ask quotation for sensors with long cable.
  7-2 Procurement of maraging rod (Takahashi)
  • Calculation and test for strength is on going.
  • The shape of head should be modified. Max. diameter is 8mm.
  9-2 Transportation to 2F (Takahashi)
  • 100kg crawler is in consideration.
  9-5 Installation
  • From 20th in January.
  9-7 Procurement of hoist tool (Ishizaki)
  • Items will be hung by 3 chain blocks.
  • 1.5t chain block is in consideration, but maybe too large.
  9-9 Procurement of handling tool (Ishizaki)
  • Stainless plate is necessary on the fine floor.
  • It is difficult to prepare for a hand lifter with large foot width.

Next meeting: 2016/9/13 13:00

Type-A Meeting on 2016/8/30

2016/8/30 13:00 - 15:00 @Room210

Participants: Takahashi, Ishizaki, Sato, Okutomi

Minutes

• 0-1 Assy. (Ishizaki)
  • This is the first priolity.
  0-2 Simulation (Okutomi)
  • Showed the yaw spectrum of the BF.
  • Requirement for dynamic range has not been shown yet.
  • Requirement for sensor is 10^-10m/rtHz, if the BF is controlled all the time.
  • Meet Miyamoto to discuss on the cryo-payload on 1st September.
  2-1 Setting of top chamber (VAC)
  • Leak test will be postponed for half of month due to delay of cooling test.
  3-2 Assembly of TF+IP (Sato)
  • Takahashi had a meeting on the place with Flaminio and Aso on 25th.
  • The place has not decided yet. Still negotiating.
  3-5 ACC preparation (Sato)
  • Calibration is postponed to the end of September.
  • Other 3 units will be taken on 31st.
  5-2 Assembly of BF (Hirata)
  • From September.
  5-6 Design of damper (Sato)
  • Amount of lift-up should be decided before the design of support ring.
  • Rotational position of BF cover should be fixed.
  • How to keep cables to cryostat? Connected or disconnected.
  • Bracket was modified. The lowest frequency was 120Hz.
  • Shape of bobbin depends on the prototype test.
  • Connectors for coils are mounted on the support frame.
  5-8 Test of LVDT (Okutomi)
  • Amplitude of oscillator was increased in 5 times. Efficiency became 5 times.
  • Test of sensor was finished. Test of actuator has not been yet.
  6-2 Procurement of EQ stop (Takahashi)
  • Two companies bid. Technical examination will be held.
  6-3 Test of prototype (Ishizaki)
  • Takahashi will make the test plan and Ishizaki will make the schedule.
  • Keep one day per week at least for the test.
  6-6 Circuit for release sensor (Sato)
  • The test circuit will be used in installation.
  • Final circuit is necessary by July in 2017.
  • Consult with AEL.
  7-2 Procurement of maraging rod (Takahashi)
  • Calculation and test for strength is necessary for all rods.
  • If the strength is not large enough, the shape of head should be modified.
  7-3 Design of support (Takahashi)
  • The rod for cryo-payload can stay in the cryostat.
  9-3 Cable assembly (Sato)
  • Plates for connectors should procured with the items on BF damping.
  • Add 20 plates for Type-Bp.
  9-10 Other tools (Ishizaki)
  • Added as new items.

Next meeting: 2016/9/6 13:00

Type-A Meeting on 2016/8/23

2016/8/23 13:00 - 14:30 @Large meeting room

Participants: Takahashi, Sato, Okutomi

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 of 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 items.

Next meeting: 2016/8/30 13:00

Type-A Review on 2016/8/10

http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5516

Type-A Meeting on 2016/8/9

2016/8/9 13:00 - 14:00 @Room210

Participants: Takahashi, Ishizaki, Sato, Okutomi

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.

Next meeting: 2016/8/16 13:00

Type-A Meeting on 2016/8/1

2016/8/1 13:00 - 16:00 @Room210

Participants: Takahashi, Ishizaki, Sato, Okutomi

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.

Next meeting: 2016/8/9 13:00

Type-A Meeting on 2016/7/26

2016/7/26 13:00 - 14:20 @Room210

Participants: Takahashi, Ishizaki, Sato, Okutomi

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.

Next meeting: 2016/8/1 13:00

Type-A Meeting on 2016/7/19

2016/7/19 13:00 - 15:00 @Room210

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

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.

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