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    IHEP MCBRD Project weekly meeting

    → Europe/Zurich
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    Progress Report 1.10.pdf
    Progress Report 1.10.pptx
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    Week 02 - MCBRD IHEP Follow up meeting

    Presents : Yingzhe (IHEP), A Foussat , (CERN)

    Excused: Xu.G, G. Kirby, H.Felice, E Todesco

    Minutes meeting and actions item list :

    • Status of coils training test:  
      • CB04 and CB06 apertures finally reached respectively 518 and 523 A after about 200 total number of quenches. These will be shipped to Bama to be assembled in MCBRD Magnet 002 from next week.
      • CB05 and CB07 are shipped to IHEP to continue training test ( 371 A on CB05)
      • The high voltage test was performed on CB07 and shown limit breakdown voltage at 1.8 kV. A check will be done with MIT 525 tester device at IHEP. Care should be taken to limit trip current and damage of insulation
    • Review meeting of VPI and wet winding processes is scheduled on next Thursday 20th at 10:00 am as proposed by IHEP. CERN will invite an internal expert.
    • IHEP presented an impregnation trial on a 0.5m long coil model which is wound by a modified procedure using a first wet winding without curing combined with a final curing. The details shall be discussed at the review as it was pointed out by AF that the use of complete VPI with dry winding should be considered as a simplification.
    • The items of the Agenda that CERN would like to discuss was presented by AF and IHEP will return an agenda considering those points:
      • Review of past VPI trials, wet winding process description ( prototype, production coils)
      • Purging and outgassing of coils. Outgassing Temperature profile and time of the vacuum chamber, coil
      • Sealing process, design upgrade confirmation  
      • Applied T,P in VPI cycles
      • Use of T,P sensor in control diagram
      • Dimensions of impregnation gap channels ( gaps and  GF / kapton layers thickness between formers, to ext tube), , compaction of GF layer on each CCT produced, confirmation of the VPI bench layout baseline
      • Test of VPI process in short samples, (Inspection destructive Test) , VPI trial plan, post VPI diagnostics ( ND tests)

    Actions items:

    • IHEP to send the agenda of review meeting on CCT VPI and wet winding processes
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