VIS Meeting on 2016/4/22

2016/4/22 13:30 -

Room 210 & eZuce

Participants:

Schedule

• The current overall schedule chart.

iKAGRA related activities

PR3

• PR3 Operation Status (Aso)
• PR3 post-run work schedule (Shoda)

iKAGRA ETM suspension

• Current status (Ohishi)
• Actuator efficiency calibration (Aso)

  • Note

Electronics

• What are necessary in the next few weeks ?

  • Got feedback from Miyakawa-san on BS schematics and item list (JGW-D1503600, E1605111) and status - there should be enough of the boxes AEL is supplying.

    • Takahashi-san asked NIKHEF about oscillator cards for LVDT chassis; 3-4 months lead time; will probably order.
    • Micro-D-SUB connector cables for OSEM: we will use the same pin-out as the PR3. Akutsu-kun will fix the labels on the silk for the flexible circuit when he remakes them.
• Watch dog system (Tanaka)

  • Graceful shutdown mechanism

  • Graceful shutdown experiments

  • Will give a presentation at the next AEL meeting on 4/18
• Electronics diagram and review

  • Electronics document tree for VIS by Mark (E1604937)

  • Updated PR3 schematic with OpLev wiring (D1604795)

  • Who will manage the electronics of each suspension
    • Type-Bp will be controlled by Shoda but the diagram update will be done by Mark
    • Type-A may be maintained by a new engineer. Sould be discussed with the person before April .
  • Miyakawa-san liked the format used by Mark and would like similar info on other suspensions as soon as possible. Mark will do Type Bp as soon as Shoda-san finalizes design, but Type A is open.

bKAGRA preparation

• Three big categories of the tasks
  • Type-A: Leader = Takahashi, Okutomi, Ishizaki, a new engineer
  • Type-B (BS and SRC): Leader = Mark, Fabian, Hirata
  • Type-Bp modification: Leader = Shoda, Fujii, A new technician (?)

Common Issues

• OSEM modification
  • Do we need wide OSEMs for IMs ?
• Do we need OSEM on the mirror or not

  • PR2 has only folding OpLev

    • Check the configuration (Raffaele, Akutsu)

      • Drawing (Hirata)

• #OSEM assembly (Akutsu)
  • #Schedule for each suspension is now given to Akutsu-kun

Type-B

• KAGRA/Subgroups/VIS/TypeB

• Task list/schedule

• Past Week Summary
  • Hirata-san produced a near-final Inventor assembly of the BS on the assembly frame, for use in writing the assembly procedure.
    • Includes assembly frame modifications suggested by Mirapro, including feet, wheels, lifting eyes, thicker crossbars under BF, IM etc.
    • Includes final rail system except for interface plate to mirror box.
    • Includes full PI with ballast masses.
    • Includes cable clamps.
    • Includes correct versions of BF and SF.
    • Includes new BF pushrod parts to work around different placement of blade screws in new version of BF.
    • Includes cleanbag support bars.
    • Includes key parts of mirror box (enough to check for interference) - needs more work.
    • Does not include various invisible duplicate assemblies that had been present due to cut and paste.
    • After a few more improvements, the new assembly will be sent back to Mirapro.

  • Got feedback from Miyakawa-san on schematics and item list (JGW-D1503600, E1605111) and status of AEL items - there should be enough.

  • Cleanbag design was finalized; Aso-san is ordering: 160419-ﾁｬﾝﾊﾞｰｶﾊﾞｰⅡ型.pdf

  • Quote for flags and prisms was received, but expensive - may drop rigid flag design.
  • The mirror box will require only very minor modifications for flags and prisms - Tatsumi-san will arrange immediately.
  • Fabian worked on understanding Sekiguchi-san's control design to help decide optimum wire thickness.
  • Mark worked on install procedure and schedule.
  • Takahashi-san enquired with NIKHEF about oscillator cards for LVDT chassis - lead time would be 3-4 months.

  • Mark posted JGW-D1503600 - BS Suspension Cabling, did a summary E1605111 BS Suspension Electronic Items List and asked Miyakawa-san for feedback and status (no reply yet). Also, some issues with previously ordered cables were brought to attention of Takahashi-san.

  • Mirapro sent assembly frame quote based on E1605037

  • Mark designed a clean bag T1605123

  • Fabian continued analysis of RM wire thickness versus mode frequency: draft report (From last week: T1605106 /draft)

  • Hirata-san investigated and found a good height for secondary prism was 3 mm. He drew up the dummy primary prisms and the secondary prisms: D1605125

  • Hirata-san did drawings for the flags: D1605087 Flag for BS RM, D1605088 Flag for BS IM, D1605112 Flag for BS IM type2

  • Hirata-san asked for quote on prisms and flags.

  • Hirata-san did assembly drawings for the safety bar between IM and RM and for the EQ stop: D1605127, D1605124

  • Hirata-san measured another filter at ATC.
• Can we make SR wire breakers bigger?

  • Fukushima-san preparing test: 3/4/2016 + 1 month = ≈4/1/2016 -> Hirata-san and Takahashi-san talking to ATC 4/8 morning.

• Flag design

  • BS Flag Redesign on OneDrive

    • Drawings done, RFQ issued: D1605087, D1605088, D1605112

  • Widen the OSEM opening (Akutsu)
  • A new local length sensing
    • Need to decide the strategy for BS: three choices
      • Use OSEMs as originally planned

      • Use OpLev, No OSEM flag

      • Use reflection type sensors, No OSEM flag
    • Decide later!
• BS dummy optic

  • Ordered, expected ≈4/22 (T1604811)

• Prisms

  • New drawings for dummy primary prisms and secondary prisms: D1605125

• EQ stop screws, extensions and lock nuts (in manufacture - promised for 4/22)
• Ballast masses for payload

  • Hirata-san created drawings DropBox link

  • Drawings were checked by Mark, not yet ordered.
• Lower breadboard stuff
  • Breadboard spring bases and associated cable clamps (in manufacture, expected 4/15)
  • Breadboard springs (in manufacture)
  • Damper ring mods (in manufacture, expected 4/28)
  • Nail-head parts: quote from Mirapro received, not urgent, will be combined with assembly frame order.
• BS Assembly Frame Design (Mark, Hirata)
  • Quote received, drawings being checked. Will need minor modifications to support clean bag (see below).
• Clean bag

  • Design done: T1605123

  • Aso-san asked for quotation to Japane Air Tech. Will get a quotation in the next week.
• 2D and 3D CAD
  • BS 3D Assembly

    • Lots of new drawings - see above or E1605035 VIS Document and Drawing Tree (BS)

    • 3D CAD for BS assembly frame received from Mirapro - Hirata-san is adding clean bag extension and rail stuff.
• Electronics
  • Lots of work:

    • JGW-D1503600 - BS Suspension Cabling

    • E1605111 BS Suspension Electronic Items List

    • D1503901 In-Vacuum Cable Detail

    • Item list and timetable was given to Miyakawa-san.
    • Need to get new longer versions of some previously ordered BF-PI and SF-PI cables (Takahashi).
    • Need to check previously ordered TM-BF and IM-BF OSEM cables have been flipped (Takahashi).
    • Decided to hand-make cables for geophones because previously ordered cables have no conductor on pin 5.

    • Need to get status on design of stepper drive box (requested by Sekiguchi-san T1503385)

• Procedure documents
  • No action since last week
• Mirror box (Tatsumi)
  • Hirata-san is working on this as top priority - design decided, drawings being checked, will get them to Tatsumi-san ASAP.
  • BS clamp blocks already adjusted.
• 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.
• Not enough crane height problem (Hirata, Saito)
  • No action since last week

Type A

• Task list (Takahashi)

• Had a Type-A meeting on 4/14 http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5126

• The next Type-A meeting will be on 4/28.
• Prototype test
  • Presented a plan at the Type-A meeting.
  • More detail needs to be discussed (Takahashi, Okutomi)
• The test of prototype long maraging rod was finished
  • Will order them soon.
• Type-A Filters Optimal Load Measurements
  • 3 SF measurements were done.
  • The shell of the 2 filters were too tight. Were able to open but could not close one of them. Takahashi will inspect them in the next week.
• Simultion (Okutomi)
  • Still trying the Simulink part to work.
• What do we need to purchase in addition to EQ stops ?
  • Local sensors for BF

Type-Bp modification

• Traverser motor driver (Shoda)
  • Need a box for stepping motor driver. Miyakawa-san is thinking about ordering chassis and boxes for motors. We discussed and agreed that the design of the boxes will be unified. The boxes will be designed and ordered together with those. (16/03/10)
  • Miyakawa-san wants to have a driver and a motor to test
    • Shoda is also asking Uraguchi-san to provide one more Traverser motor driver for the test.

      • -> Done, It must be sent to Kamioka today.

• Modification for bKAGRA

  • wiki

  • Status of the plan IP
    • Fujii is writing the assembly procedure and the base design proposal for Uraguchi-san. Now it is in review inside the Type-Bp team.
  • Status of the plan BF
    • Hirata-san provided the latest CAD model for the BF, which includes the material information.

    • Please check the Report (Shoda)

      • Structure analysis of the EQ stop for active damping on BF
      • Minimam weight we need for the BFRM in order to damp the resonance enough
      • The first draft of the BF cap modification
  • Action items for Type-Bp modification
    • Update the document for Uraguchi-san (Fujii)
    • Simulation to decide the sensors and actuators for IP (Fujii)
    • Make first draft of the rigid BFRM structure (Shoda)
    • Work on the motor remote control (Shoda)
  • Will have a meeting with Virgo people on 4/18. Then have a review for Type-Bp

Site work plan for the next week

• Mon:
• Tue:
• Wed:
• Thu:
• Fri:

Travel Plans

• Travel (Week of 4/25)

  • Takahashi:23-26 (Shift+IP work)

  • Shoda:
  • Mark:
  • Fabian:
  • Okutomi:
  • Fujii: 25-27 (IP work)
  • Ishizaki:
  • Hirata:
  • Ohishi:
• Travel (Week of 5/2): Golden Week
  • Takahashi:
  • Shoda:
  • Mark:
  • Fabian:
  • Okutomi:
  • Fujii:
  • Ishizaki:
  • Hirata:
  • Ohishi:

Other

• Safety
• #GAS blade inspection by Virgo (Takahashi)
  • Shipped the blades. Will get results in 1-2 months.

Next meeting

2016/5/6(Fri) 13:30 - (4/29 is a holida)

Next F2F: 2016/5/13(Fri)@Mitaka