Fiber milestones wls fiber for tracking proto
This presentation is the property of its rightful owner.
Sponsored Links
1 / 15

Fiber Milestones: WLS Fiber for Tracking Proto. PowerPoint PPT Presentation


  • 57 Views
  • Uploaded on
  • Presentation posted in: General

Fiber Milestones: WLS Fiber for Tracking Proto. Quick summary All Tracking prototype WLS fiber arrived in 2 shipments 60% shipment & 40% shipment 2 shipments due to availability of funds 60% shipment shipped in July The 40% shipment is about ½ finished at the shutdown

Download Presentation

Fiber Milestones: WLS Fiber for Tracking Proto.

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Fiber milestones wls fiber for tracking proto

Fiber Milestones:WLS Fiber for Tracking Proto.

  • Quick summary

    • All Tracking prototype WLS fiber arrived in 2 shipments

      • 60% shipment & 40% shipment

      • 2 shipments due to availability of funds

    • 60% shipment shipped in July

    • The 40% shipment is about ½ finished at the shutdown

      • 40% shipment ready to ship about 1 month after shutdown finishes

        • Shutdown finishes Oct 12, but PPD will try to get crew back earlier

      • very large loss of schedule contingency

    • Not expected to impact WBS 3and downstream schedules

    • Have two functioning QC tests

      • both show little variation

      • n.b., these two techniques don’t definereflectivity in the same way, butboth are sensitive to mirror variations

MINERvA WBS 1,2,4: Scintillator and Fiber


Wls production

WLS Production

  • We expect to start WLS production mirroring in mid January 2008

MINERvA WBS 1,2,4: Scintillator and Fiber


Upgrades since dir rev

Upgrades since Dir Rev

  • We have added 2 new technicians

    • One went from part time to full time in July

    • One starting ½ time in Aug & Sep (shared with CMS ) and full time in Oct

    • Both of these technicians are being trained for ODU production

  • We have doubled the number of gluing stations from 60 to 120

  • We have more than doubled our table space for production

  • We have identified the table space for boot production

MINERvA WBS 1,2,4: Scintillator and Fiber


Fiber milestones odu for tracking proto

Fiber Milestones:ODU for Tracking Proto.

  • Quick summary

    • ODUs approximately 60% complete

    • some Q/C issues identified and addressed

    • ODU quantities required were updated by downstream factories

MINERvA WBS 1,2,4: Scintillator and Fiber


Fiber milestones wls fiber for tracking proto

ODUs

  • For tracking prototype we are supposed to ship 543 ODUs

  • 335 ODUs have been shipped

    • Pass optical QC & fit test

  • Another 120 ODUs have passed the optical QC

    • We are modifying the fit test and are waiting for test hardware from Lab 7

  • Another 200 are in various stages of production

  • Optical QC test

    • Optical QC requires each fiber in a ODU must have its value > 90% of the transmission mean for that channel

    • 5.7% failed the optical QC

    • In addition…

      • Another 2.0% of ODUs failed because we purposely pushed the diamond to its limit before relapping/replacing to test its lifetime

      • 7.5% failed to clip into box because of epoxy on back end of ferrule.

        • We noticed this problem after producing 300 ODUs

        • In the last 100 ODUs the problem did not occur

        • In the future we think < 1% of the ODUs will fail this test.

      • The failure rate is slightly higher than before as we bring on these new people

MINERvA WBS 1,2,4: Scintillator and Fiber


Tracking prototype odus

Tracking Prototype ODUs

  • Estimate of failures for future production

    • 5% optical + 1% epoxy failure, if no other problems

MINERvA WBS 1,2,4: Scintillator and Fiber


Fiber milestones cable production

Fiber Milestones: Cable Production

  • In a slide…

    • Work on cable mold significantly delayed

      • conscious choice because of large float

    • Cable production problems identified

      • change in ferrule length impliesneeded mold modifications

      • problems with pouring process andES&H impact of the material(polyurethane with Al(OH)3 fire retardant)

      • material flow into andwear on mold ejection parts

    • Remediation

      • new procedure removes need for ejector

      • in the process of completing new hardware

      • estimated startup in 4-6 weeks

MINERvA WBS 1,2,4: Scintillator and Fiber


Optical cable r d

Optical Cable R&D

  • New Mold

    • Use sliding clamp to press connector against mold to prevent mold material from flowing to front of connector

      • The Alumilite polyurethane did not flow into around the connector to the polished fibers as it was doing with the old mold

    • No extraction pins which got gummed up in previous mold

      • Use straps put in the boot

      • Mold cheaper by more than a factor of 2

    • We have successfully made boots with new mold and our original molding material, Alumilite polyurethane

    • Problem with mold, connectors fit too tight in the mold right now

      • material will have to be removed in the mold

      • about 1 week of work.

MINERvA WBS 1,2,4: Scintillator and Fiber


Mold material

Mold Material

  • But the Alumilite is not ideal

    • It is fluid than we want

    • Will require a chemical hood, restricts how we do production

  • We have identified 2 epoxies which look very promising to replace the Alumilite, but we have not finished the R&D

    • Both epoxies packaged for 2 component mixing guns

    • Both have about the right viscosity

  • Heigl MP5405bk – 1st choice

    • Hardens in 15 minutes, no chemical hood needed

    • Successfully & easily put boots on 5 cables with original mold

    • Problem, Its black material transmits red light

      • Heigl will work with us to fix this problem.

MINERvA WBS 1,2,4: Scintillator and Fiber


Mold material1

Mold Material

  • Resinlab EP1046fg

    • Can pull boot out after 1.5 hours, not ideal, but good enough to finish project

    • Epoxy is fine, other than the setting time

  • None of these 3 products are fire retardant

    • ES&H suggestion is to paint with fire retardant paint

    • Sent initial set of Heigl painted sample to for fire test

      • Had problems at sharp corners, but successful otherwise

    • Made new samples to fire test which fixed problems with sharp corners

      • Made samples of all 3 materials

      • They have been given to Jim Priest

MINERvA WBS 1,2,4: Scintillator and Fiber


Cable production

Cable Production

  • We expect to start tracking prototype cable production on Nov 1 2007

  • Full Cable production starts on May 1 2008

MINERvA WBS 1,2,4: Scintillator and Fiber


Clear fiber qc

Clear Fiber QC

  • We measured the attenuation length for the ODU fiber

  • Measured attenuation length of ODU fiber

    • 5 m pieces

    • Cut back test

    • Use 1 m WLS jumper

      • Get a 50 cm longer number as opposed to a 50 cm clear jumper

      • CMS and some early MINERvA tests we used 50 cm clear jumper

MINERvA WBS 1,2,4: Scintillator and Fiber


Clear cable qc

Clear Cable QC

  • Get l = 815 cm

  • Equivalent to 770 cm in measuring it in the way that CMS did and we got about 800 cm for the attenuation length in CMS for 0.94 mm S-35 fibers

    • So CMS and MINERvA clear fibers are fairly close in attenuation length

MINERvA WBS 1,2,4: Scintillator and Fiber


Esh qa changes

ESH/QA Changes

ESH/QA:

  • WBS 1:

    • Removed weekly cosmic ray light yield check with extruded strips

      • always tracked more precise source tests which are performed daily

  • WBS 2:

    • QC procedure uses razor blades for cutting fiber at 45°

      • recent concern raised by PPD ES&H. no directive yet, but in communication

  • WBS 4:

    • QC improvements already discussed

    • We are working with ES&H on the new mold material both for personal safety and fire safety

      • Heigl epoxy does not require a chemical hood

MINERvA WBS 1,2,4: Scintillator and Fiber


Identified risks at cd 3a wbs 4 fiber cables

Identified Risks at CD-3a:WBS 4 (Fiber Cables)

  • Final tests of light-tight mold essentially failed to hold up in a production situation

    • Solution is seen in either redesigning the mold or getting a new mold material and we did both

    • R&D should be finished in September 2007

  • Fiber costs carry significant contingency to reflect past changes in pricing from Kuraray (less of a problem with clear fiber than WLS)

MINERvA WBS 1,2,4: Scintillator and Fiber


  • Login