Difference: SciFiFibreProcurement (21 vs. 22)

Revision 222018-03-28 - ChristianJoram

Line: 1 to 1
 
META TOPICPARENT name="UpgradeSciFiTracker"

Work package: Fibre Procurement and QA

Line: 7 to 7
 

Scope

Changed:
<
<
  • The work package deals with the specification, procurement and characterisation of the scintillating fibres. During the series production, the WP ensures the reception, qualification and redistribution of the fibres to the mat production centres. The total length of the ordered fibres is 11,000 km.
  • We measure geometrical (scan along the fibre), optical and radiation parameters, the latter two on sample basis.
>
>
  • This - by now completed - work package deals with the specification, procurement and characterisation of the scintillating fibres. During the series production, the WP ensures the reception, qualification and redistribution of the fibres to the mat production centres. The total length of the ordered fibres is 11,000 km. In autumn 2017 it was decided to order additional 1,000 km of fibres as spare.
  • We measure geometrical (scan along the fibre), optical and radiation parameters, the latter on a sample basis.
 
  • In 2016 we developed a method to reduce the size of bumps (zones with increased fibre diameter). The fibre is drawn in a controlled way through a hot wire drawing tool with a diameter of 350 um. In this way we manage to 'shrink' bumps of up to 500 um down to 350 um. Bumps of 350 um or less were shown to not cause any significant damage in fibre mat winding. The bump shrinking procedure is fully automatic and part of the fibre scan.
  • Bumps larger than 500 um are cut out manually and the fibre ends are joined by UV curing optical glue.

Current main activities

Changed:
<
<
  • We are in the series production phase. We receive every two weeks a batch 24 spools = 300 km of fibres.
  • We aim at characterising and refining the full batch within 2 weeks after reception. A speedy feedback to the producer minimises wasted fibres in case of quality problems.
>
>
  • All 12,000 km have gone through the full QA process incl. de-bumping. The last spool was treated on 21/03/2018.
 

Guides and instructions for QA procedures

 
This site is powered by the TWiki collaboration platform Powered by PerlCopyright & 2008-2019 by the contributing authors. All material on this collaboration platform is the property of the contributing authors.
Ideas, requests, problems regarding TWiki? Send feedback