Differences between revisions 1 and 15 (spanning 14 versions)
Revision 1 as of 2016-03-04 05:32:44
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Editor: YoichiAso
Comment:
Revision 15 as of 2016-03-10 17:45:17
Size: 7352
Editor: AyakaShoda
Comment:
Deletions are marked like this. Additions are marked like this.
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= VIS Meeting on 2016/2/26 =
2015/2/26 13:30 -
= VIS Meeting on 2016/3/4 =
2016/3/4 13:30 -
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Participants: Mark, Hirata, Aso, Ohishi, Takahashi Participants:Takahashi, Ishizaki, Hirata, Mark, Fabian,Aso, Tanaka, Akutsu
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  * http://klog.icrr.u-tokyo.ac.jp/osl/?r=831
  * The PR3 mirror is now inside the chamber.
  * Checking cables and sensor signals
  * Mechanical Installation is done
  * Damping control is mostly working
  * Actuator control
   * Traverser remote control needs to be done
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 * Mon: Suspenion control tuning
 * Tue: Suspenion control tuning
 * Wed: Suspenion control tuning
 * Thu:Suspenion control tuning
 * Fri: Suspenion control tuning
 * Mon:Okutomi will stay
 * Tue:Okutomi will stay
 * Wed:
 * Thu:
 * Fri:
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  * All the suspensions are in the vacuum chambers
  * Removal of the first contact and replacement of some coils are to be done in the next week
  * Picomotor check is to be done
  * ETMX first contact peeling did not go well. Small pieces remaining
  * ETMY: we found big scratches on the HR surfaces
  * Will continue with the current status
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 * Travel (Week of 2/29)
  * Takahashi:
  * Shoda:Mon-Fri
 * Travel (Week of 3/7)
  * Takahashi:Mon-Tue
  * Shoda:
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  * Okutomi:Mon-Fri
  * Fujii:Mon-Fri
  * Okutomi:Mon-Tue
  * Fujii:
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  * Hirata:   * Hirata:10-11 not available
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 * Travel (Week of 3/7)  * Travel (Week of 3/14)
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  * #Traverser motor driver (Shoda)''' ''' -> Will discuss Uraguchi-san. Need a box for stepping motor driver. -> These are for PR2. Will be ordered sometime.   * #Traverser motor driver (Shoda)''' ''' -> Will discuss Uraguchi-san. Need a box for stepping motor driver. -> These are for PR2. Will be ordered sometime. -> 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)
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  * PCB delivered
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 * Need to make Guradian script for PR3. Shoda + Fujii and Okutomi will write one after the mechanical installation is finished.   * Operation check of the prototype board is done
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 * #Electronics diagram and review
  * Mark: detailed schematics [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=3615|D1503615 (full PR3)]], [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=4795|D1604795 (iKAGRA PR3)]]
  * Mark: overview schematic
  * Will stuff the PCB for the mass production board next

 * #Need to make Guradian script for PR3. Shoda + Fujii and Okutomi will write one after the mechanical installation is finished. -> DONE(16/03/08)

 * Electronics diagram and review
  * Electronics document tree for VIS by Mark (http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=4937)
  * Updated PR3 schematic with OpLev wiring (http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=4795)

  * Need to think about who will be resposible for the electronics of each suspension
  * Operation manual for digital system is necessary
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 * Task list[[KAGRA/Subgroups/VIS/TypeB/TaskList]]  * [[KAGRA/Subgroups/VIS/TypeB]]
 * [[https://onedrive.live.com/redir?resid=D5CCFA70A378E0D0!185&authkey=!AGcFDradxzrNJ00&ithint=folder,txt|Task list/schedule]]
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  * First LIGO company quoted on prism less grooves, and recommended other company for those. US$750 each for 12, 6-8 weeks delivery. [[attachment:Insaco_prism_quote.pdf]]
  * The company suggested another US company for V-cut. '''Mark will contact them'''.
  * Got a quotation from Shinko-sha (Takahashi)
  * Now have quotes for both prisms and grooves for orders of both 4 and 12:

|| ||Prisms ||Grooves ||Total ||
||4 ||$3,600 ||$2,600 ||$6,200 ||
||12 ||$9,000 ||$5,800 ||$14,800 ||


  * Shinko-sha quotation
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  * With the V-cut company being different from what LIGO used, the advantage of using US companies is not clear now.
  * One possibility for risk reduction: buy 2 from US, 4 from JP and use 2 from JP for test hanging to see if they work fine or not. If they work fine, we can continue to use them for SR. If they fail, we have another set to try from US.
  * We decided to order 6 to Shinko-sha
   * '''Takahashi will call the compnay to have a meeting '''
   * '''Aso will check with Ohashi-san about the budget '''
   * We will use the saphhire prisms for the test hanging too
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  * Check what happens if we widen the slit by 3.75mm and make a new M5 (Hirata) -> [[https://www.dropbox.com/sh/f5lnexvb6k9bovo/AABEYf4_C19GXYEuJZZiy7cqa?dl=0|Result]]
   * Two concerns
    * The rework may bend the wing shaped parts.
    * The P.C.D. of the new screw holes may not coincide exactly with the other existing holes
   * Consult with Fukushima-san again. Takahashi will contact Fukushima-san
    * 型振り放電加工機 may be better
    * Will test machine the dirty recoil mass. '''Will have another meeting with Fukushima-san''' (Takahashi)
   * Do we need to widen the slits for PRC RMs ? -> Depends on how difficult it is to rework the RM.
  * We will ask ATC to widen one RM first.
  * Brought back one RM to Mitaka
   * It will take more than 1 month to machine (Fukushima-san)
   * Iwashita-san is preparing some tools for the machining. May take more than one month.
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  * Re-adjusted the flag design to make it as short as possible (Mark)   * [[https://onedrive.live.com/redir?resid=D5CCFA70A378E0D0!279&authkey=!ABLGQZIFvuQFtz4&ithint=folder,dwg|BS Flag Redesign on OneDrive]]
  * Could make BS optic flag shorter by about 4 mm ("BS Optic Flag Concept 3 (Small Magnet, Short)") but it would cause work for Tatsumi-san for little benefit.
  * Recommend "BS Optic Flag Concept 2 (Small Magnet)"
  * '''Will make a smaller foot print flag design (Mark) '''
  * Fabian did rigid IM flag design ("TBD")
   * Mark would like to make a test flag with magnetic attachment.
   * Use a key to determine the rotation angle of the flag
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  * '''Hirata-san will get quotes from companies (consult with Takahashi-san which company to ask)'''
 * IP base clamp (Fabian): Reduce the number of clamps-> Hirata-san finished 2D drawings. Trying to get quotation now.-> Still waiting for the quotation.-> Will get a quotation on the next Monday.
 * Wind shield around the assembly frame may be necessary. Working on the design (Mark)
 * Bread board spring (Takahashi): Hirata-san is getting quotations.Asked quotation with the above one all at once.
 * Issue with adjustment screws on lower optical bench (bench can only be adjusted down from nominal due to lack of holes in bench below new position of screws holding wires)
  * Mark, Hirata and Takahashi will discuss how to solve the issue and '''present a solution at the next meeting.'''
  * Hirata-san is waiting for quotes from three companies
 * IP base clamp (Fabian): Ordered
 * Bread board spring (Takahashi): Got a quotation, but expensive. Looking for other companies.
 * Issues with lower optical bench and damper ring.
  * Last week's problem solved: support blocks on damper ring can be moved circumferentially to match support blocks on lower optical bench.
  * New problem: damper ring needs to have central hole enlarged to allow passage of suspension during installation.
   * Asking Mirapro to make a modification(Takahashi)
  * New problem: nail-head parts are too short to hook in support blocks - need to be remade longer (and rods shortened to match).
   * Will make a design change.(Takahashi)
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  * Add some mechanism to hook a load gauge
  * '''Check details with Hirata-san to make sure the interfaces with the hanging frame and the suspension (Mark)<<BR>>'''
  * '''Present the design at the next VIS meeting (Mark)'''
  * Need to add some mechanism to hook a load gauge
  * Need to add some attachment points (e.g., ferromagnetic plates) for placing wind-shield panels.
  * With check the structural strength
  * Will talk with Mirapro ('''contact Nakamura-san : Hirata''')
  * '''Take photos of the BS area to see where is the optimal location of the assembly frame (Aso) '''
 * Making assembly drawings for BS (Hirata)
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 * Thinking about a possibility of testing the long filter chain using the prototype EQ stop in Kashiwa.
 * '''Organize a kick-off meeting in the later half of March, concentrating on the room temperature part. (Takahashi) '''
 * Prototype long maraging rods (heat treated) were delivered from Aoyama
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   * Aoshima can do the heat treatment for the long rod. Will ask them soon (Takahashi) -> Still waiting for a quotation.    * Aoyama can do the heat treatment for the long rod. Will ask them soon (Takahashi) -> Still waiting for a quotation.
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   * We need to send the spare mirror and the containers back to Kashiwa soon.
    * Bring back to Mitaka on 2/26.
   * Bring back CLIO suspension too (Takahashi) -> Not this time
   * Spare mirror is now back to Kashiwa

 * CLIO suspension
  * Ishizaki-san will come to pick it up
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  * Using Bel wires for the safety of working on the 2F may be good
   * '''Ishizaki will check if there is clean compatible ones<<BR>>'''
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2015/3/4 (Fri) 13:30 - 2016/3/11 (Fri) 13:30 -

VIS Meeting on 2016/3/4

2016/3/4 13:30 -

Kamioka NAOJ Room & SeeVogh

Participants:Takahashi, Ishizaki, Hirata, Mark, Fabian,Aso, Tanaka, Akutsu

Schedule

  • Schedule status (Aso) (Chart)

PR3

  • PR3 Installation Status
    • Mechanical Installation is done
    • Damping control is mostly working
    • Actuator control
      • Traverser remote control needs to be done

Plan for the next week

  • Mon:Okutomi will stay

  • Tue:Okutomi will stay

  • Wed:
  • Thu:
  • Fri:

iKAGRA ETM suspension

  • Current status (Ohishi)
    • Picomotor check is to be done
    • ETMX first contact peeling did not go well. Small pieces remaining
    • ETMY: we found big scratches on the HR surfaces
    • Will continue with the current status

Travel Plans

  • Travel (Week of 3/7)
    • Takahashi:Mon-Tue

    • Shoda:
    • Mark:
    • Fabian:
    • Okutomi:Mon-Tue

    • Fujii:
    • Ishizaki:
    • Hirata:10-11 not available

    • Ohishi:
  • Travel (Week of 3/14)
    • Takahashi:
    • Shoda:
    • Mark:
    • Fabian:
    • Okutomi:
    • Fujii:
    • Ishizaki:
    • Hirata:
    • Ohishi:

Other Mechanical Issues

  • #OSEM assembly status (Akutsu)
  • #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. -> 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)

Electronics

bKAGRA preparation

  • Three big categories of the tasks
    • Type-A: Leader = Takahashi
    • Type-B (BS and SRC): Leader = Mark
    • Type-Bp modification: Leader = Shoda

Common Issues

Type-B

Prisms

Grooves

Total

4

$3,600

$2,600

$6,200

12

$9,000

$5,800

$14,800

  • Shinko-sha quotation
    • 260KJPY for two. Lead time = 1.5month
  • We decided to order 6 to Shinko-sha
    • Takahashi will call the compnay to have a meeting

    • Aso will check with Ohashi-san about the budget

    • We will use the saphhire prisms for the test hanging too
  • Can we make SR wire breakers bigger ?
    • We will ask ATC to widen one RM first.
    • Brought back one RM to Mitaka
      • It will take more than 1 month to machine (Fukushima-san)
      • Iwashita-san is preparing some tools for the machining. May take more than one month.
  • Flag design (Mark)
    • BS Flag Redesign on OneDrive

    • Could make BS optic flag shorter by about 4 mm ("BS Optic Flag Concept 3 (Small Magnet, Short)") but it would cause work for Tatsumi-san for little benefit.
    • Recommend "BS Optic Flag Concept 2 (Small Magnet)"
    • Will make a smaller foot print flag design (Mark)

    • Fabian did rigid IM flag design ("TBD")
      • Mark would like to make a test flag with magnetic attachment.
      • Use a key to determine the rotation angle of the flag
    • Widen the OSEM opening (Akutsu)
  • BS dummy optics design (Fabian)
  • IP base clamp (Fabian): Ordered
  • Bread board spring (Takahashi): Got a quotation, but expensive. Looking for other companies.
  • Issues with lower optical bench and damper ring.
    • Last week's problem solved: support blocks on damper ring can be moved circumferentially to match support blocks on lower optical bench.
    • New problem: damper ring needs to have central hole enlarged to allow passage of suspension during installation.
      • Asking Mirapro to make a modification(Takahashi)
    • New problem: nail-head parts are too short to hook in support blocks - need to be remade longer (and rods shortened to match).
      • Will make a design change.(Takahashi)
  • BS Assembly Frame Design (Mark, Hirata)
    • Design is almost complete
    • Need to add some mechanism to hook a load gauge
    • Need to add some attachment points (e.g., ferromagnetic plates) for placing wind-shield panels.
    • With check the structural strength
    • Will talk with Mirapro (contact Nakamura-san : Hirata)

    • Take photos of the BS area to see where is the optimal location of the assembly frame (Aso)

  • Making assembly drawings for BS (Hirata)
  • #BS gluing jigs (Tatsumi)
  • #Not enough crane height problem (Hirata, Saito)
  • #BS clean bag (Aso)

Type A

  • Task list (Takahashi)

  • Thinking about a possibility of testing the long filter chain using the prototype EQ stop in Kashiwa.
  • Organize a kick-off meeting in the later half of March, concentrating on the room temperature part. (Takahashi)

  • Prototype long maraging rods (heat treated) were delivered from Aoyama
  • #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
      • Aoyama 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

  • PR2 Wire breaker problem
    • Prism removal from PR2 (Hirose, Mark)
      • Spare mirror is now back to Kashiwa
  • CLIO suspension
    • Ishizaki-san will come to pick it up

Other

  • Safety
    • Using Bel wires for the safety of working on the 2F may be good
      • Ishizaki will check if there is clean compatible ones

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

Next meeting

2016/3/11 (Fri) 13:30 -

Next F2F 2016/4/1

KAGRA/Subgroups/VIS/VISMinutes20160304 (last edited 2016-03-10 17:45:17 by AyakaShoda)