• KAGRA
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• VIS
• VISMinutes20160129

VIS Meeting on 2016/1/29

2015/1/29 13:30 -

Kamioka TV conference room + SeeVogh

Participants:Takahashi, Fujii, Okutomi, Aso, Shoda, Hirata, Tanaka, Ishizaki, Mark, Fabian, Akutsu, Tatsumi, Joris

Schedule

• Schedule status (Aso)
• Cleaning of PRM and PR3 chamber from 2/1-2/3. PR2 and BS chambers from 2/4 - 2/6.

PR3

• PR3 Installation Status (Takahashi)
  • An OSEM flag and a 2nd wire breaker came off. We had a special meeting on this.
  • PR3 dusts: leave them until bKAGRA when we replace the 1st prisms (recommendation from Hirose).

  • #Traverser repair: Repair of the broken ones at Mitaka -> Uraguchi-san is working on it.

  • #Screws to fix the front and back rings the RM were too long, or the tapping in the holes were too short. Couldn't use M5x40. Ordered M5x35 with vent holes. -> Delivered. Remember to replace them

• PR3 flag and 2nd wire breaker repair status (Tatsumi)

  • Weekly Report

  • Flags and wire breakers will be brought back to Mitaka by Takahashi-san tonight
  • Ishizaki-san will transport PR3 to Kamioka on Friday together with PRM

• The frame for the clean bag is bent. Aso will contact Mirapro for a stronger frame.

Plan for the next week

• Mon: Chamber cleaning
• Tue: Chamber cleaning
• Wed: Chamber cleaning
• Thu:
• Fri:

PR2

• IOO wants the optical bench back (Aso)
  • They were taken out. Handed to IOO.

• #OpLev interference check (Akutsu)

Plan for the next week

• Mon:
• Tue:
• Wed:
• Thu:
• Fri:

iKAGRA ETM suspension

• Disassembly (and cleaning) of the suspensions (Ohishi)
  • Everything was cleaned and shipped to Kamioka
• Assembly of the suspension

  • Damaged one vertical spring -> Replace with CLIO ones (all 4 of them to maintain the balance)

• Preparation of missing parts (Tatsumi, Takahashi)
  • Connectors: Will use two D-SUB9, one for coils and another one for Pico-motors

  • Plates to fix the connectors on the suspension frame were ordered. -> Expected delivery date Feb. 4th.

  • We have connector shells, pins and cables.

  • Coil bobin: Delivery date-> Feb. 4th.

• PRM transportation (Tatsumi)
  • Thin plates to protect magnets arrived

  • Plastic container -> Delivery date 2/2(Kashiwa) 2/4 (Mitaka)

• Dummy mirror: To glue the magnets
• Coil winding (Takahashi)

  • Wires: will use the capton wires prepared for the LVDT coils. Coil Spec.

  • Winding tools: Stocked in the 20m lab. -> Delivered to Kamioka. Will do test winding on Wed and Thu next week (Takahashi).

  • Two of Ando lab. students will come to Kamioka to wind the coils from 2/8. Will work in PR3 clean booth.

Plan for the next week

• Takahashi: Wed-Thu: Coil winding check, picomotor check, TF check.

Travel Plans

• Travel (Week of 2/1)

  • Takahashi:Wed-Thu

  • Shoda:Mon-Wed

  • Mark:
  • Fabian:
  • Okutomi:
  • Fujii:
  • Ishizaki: Fri
  • Hirata:
  • Ohishi:
• Travel (Week of 2/8)
  • Takahashi: Mon-Wed

  • Shoda:Mon-Fri

  • Mark:
  • Fabian:

  • Okutomi:Mon-Fri

  • Fujii:Mon-Fri

  • Ishizaki:
  • Hirata:
  • Ohishi:

Other Mechanical Issues

• BF Optimal Weight (Takahashi)
  • Inscription of the number on the BF #1 and BS BF. Installation of LVDT coils. Check the optimal load of BF #5 and #6.
    • #5: optimal weight 52.3kg consistent with the previous measurement
    • #6: optimal weight 53.2kg consistent with the previous measurement
  • Balast masses: Delivered to Mitaka. Will send them to Kamioka (Hirata)
• IM wire clamps
  • Need to send the wire clamps used for the test hanging to I-ject: will send them to I-ject on Monday (Takahashi)
• Wire winches

  • Shipped to Mitaka today. We need a coordination with Ikenoue-san for this work (Takahashi)

• #Traverser actuation check (Shoda)
• #PR CAD model and assembly drawings (Hirata)
  • Aso calculated the rotation angle
    • PR3: 0.786deg counter clockwise from the line connecting the centers of the PR3 and BS chambers.
    • Will make a report soon.
• #Clean work procedure
  • Order clean wipes (Aso)
  • KAGRA should have a special meeting for clean requirements: Will propose another meeting. (Aso)
• #Wire cleaning (Hirata)

  • Hirata will order 20m more wires. -> Delivered. Will wipe in the next week. -> Finished. Will send to Kamioka soon.

  • Will wash Tungsten wire delivery status -> Delivered. Will wipe in the next week -> Finished. Will send to Kamioka soon.

• #Production of additional PR winches (Akutsu)

  • Shipping status (Takahashi, Hirata) -> Wrapped. Will be shipped with IP in the next week.

• #OSEM assembly status (Akutsu)
• #List of what should be changed for PR3 hanging
  • People should share ideas whenever they come up with missing thigns.
  • Shoda made a spread sheet for keep tracking the ideas

    • https://docs.google.com/spreadsheets/d/1zZaLObWjDSEOTrr85Hz0ApXxEUChK3xJ_chk0f7r5nY/edit?usp=sharing

    • All the items are now done or being taken care of
• #Missing items(to be purchased soon)

  • #Traverser motor driver (Shoda) -> Will discuss Uraguchi-san. Need a box for stepping motor driver. -> These are for PR2. Will be ordered sometime.

Electronics

• What are necessary in the next few weeks ?
  • Nothing
• Electronics diagram and review
  • Mark will make overview diagrams of VIS electronics by the end of Jan.

  • Review of PR3 electronics early February-> 2/4 after the group meeting.

• Watch dog system (Tanaka)
  • Test circuit was produced
  • Working on the prototype for mass production
  • Presentation at the next AEL meeting
• #LVDT distributor connector problem

  • Miyakawa-san circulated a design of the conversion cable (D9-D15): drawing

• #Digital System (Okutomi, Fujii)
• #Cable status (Takahashi)

  • Need to send more PTFE cable to finish the remaining two -> Will do it in the next week

  • Need to send the cables used for the test hanging once it is finished. -> Will send them once the test hanging is disassembled.

• #Cable check
  • Liu-kun Zhao-kun finished checking all the cables. They found another broken cable.
  • Will send the broken cables together with the other cable related items (Takahashi).

bKAGRA preparation

• Three big categories of the tasks
  • Type-A: Leader = Takahashi: Task list, team members
  • Type-B (BS and SRC): Leader = Mark: Task list, team members
  • Type-Bp modification: Continue discussion (Aso, Raffaele)

Common Issues

• Wire breaker problem
  • Prism removal from PR2 (Hirose, Mark)
    • Not yet ready
• #RM cleaning (Takahashi)

  • Which RMs are really clean ?-> 1st one and the 2nd one have different finish. So only the 1st one is dirty.

  • For the cleaning purpose, using a leutor seems enough

BS and SR

• Task list (Mark): Present a list at the next VIS meeting. KAGRA/Subgroups/VIS/TypeB/TaskList

  • Kick off meeting within February (Mark)
• BS prism preparation
  • Contacted the company LIGO used for the possibility of buying sapphire prisms (Mark)
  • They are happy to take an order. No Japanese agent. But international order can be taken.

  • Will ask for the lead time to the company (Mark) Drawing to be sent (LIGO drawing) -> Send the drawing to the companies immediately

• Can we make SR wire breakers bigger ?

  • Asked Fuskushima-san about the possibility of widening the slits (Takahashi) -> It is possible but there is a risk of slight deformation.

  • We will try to widen the slit using the dirty RM used for the test hanging.

  • We need to decide on how much to widen. Check what happens if we use 5mm tall prism on CAD (Hirata) -> Result

    • Make the slit wider by 3mm will interfere with a M5 threaded hole
      • The hole is needed to keep the mechanical rigidity
      • Can make a new M5 hole somewhere near by ?
    • Check what happens if we widen the slit by 3.75mm and make a new M5 (Hirata)
      • Then we will talk to Fukushima-san again
    • If the design of the SR prisms can be the same as BS, it will be a good idea to order them at once.
      • Check if the BS prism can be used(Mark)
• Flag design (Mark)
  • Some concerns
    • Flag is too tall ? (Raffaele)
    • Make the foot print smaller to reduce thermal noise ? (Aso)

  • Mark will sort out the ideas and organize a specialized meeting.

• IP base clamp (Fabian): Picture -> Reduce the number of clamps

• Bread board spring (Takahashi): Slides

• New accelerometer tests for BS IP (Joris)

  • e-log entry 1

  • e-log entry 2

• #BS Assembly Frame Design (Aso, Hirata)
• #BS gluing jigs (Tatsumi)
• #Not enough crane height problem (Hirata, Saito)
• #BS clean bag (Aso)

Type A

• Task list (Takahashi): Present at the next VIS meeting.
• Fishing rod production status (Takahashi)
  • Ordered the material for the blades.
  • Stepping motors were ordered.
  • Mechanical parts remaining to be ordered (have drawings already)
• #Type-A Filters Optimal Load Measurements

  • #Takahashi will make a plan for the optimal load check and ask ATC.-> Check two filters per month from April 2016. -> Will be presented to the ATC steering committee.

  • #How to manufacture the long maraging wires ?
    • One prototype was machined by Ojima

    • Aoshima can do the heat treatment for the long rod. Will ask them soon (Takahashi) -> Still waiting for a quotation.

    • How to test it ?
      • We can use the prototype assembly frame in TAMA.

#Type-Bp modification

Other

• Clean wear
  • Clean inner wears are given to individuals. Wash them yourself.

  • http://www.guardner.co.jp/product/products/detail.php?product_id=143

• Safety
  • No incident
• #Work reports
  • Both on-site and off-site works should be reported in the KAGRA e-log.
  • A weekly summary entry should be posted before the weekly meeting: the entry should be an itemized list of things done with links to detailed e-log entries.
• #Installation procedure document
  • Many people need to contribute to the document. However, we need one person responsible for the consistency of the document.
  • BS installation document: Mark will be the editor.
• #GAS blade inspection by Virgo (Takahashi)
  • Shipped the blades. Will get results in 1-2 months.

Next meeting

2015/2/5 (Fri) 13:00 -

The next F2F at Mitaka: 2/19