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.
Electronics
- What are necessary in the next few weeks ?
- Nothing
- Watch dog system (Tanaka)
- PCB delivered
- Operation check of the prototype board is done
- 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.
- 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
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
- Kick off meeting within February (Mark)
- BS prism preparation (Mark)
- 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
- 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)
- 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)
http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=4811
- The above design seems fine.
- 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)
- 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
- Prism removal from PR2 (Hirose, Mark)
- 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
- Using Bel wires for the safety of working on the 2F may be good
- #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