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    . IHEP MCBRD Project weekly meeting

    → Europe/Zurich
    2021-10 MCBRD CERN modifications formers list.pdf
    2021-10 MCBRD CERN modifications formers list.pptx
    Progress Report 10.25.pdf
    Progress Report 10.25.pptx
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    Week 43 - MCBRD Follow upmeeting

    Presents : Yingzhe (IHEP), A Foussat , A Musso, G Kirby,  L. Quain (CERN)

    Minutes meeting and actions item list :

    • Schedule: IHEP announced further delays on the cold test at IMP due to COVID restrictions, quarantine of the town for unknown duration
    • Electrical testing: IHEP clarified that the test station withstand voltage is limited to 2.5 kV. The factory test at Bama on assembled magnet at warm before test at 3.2kV per EDMS 2363906 CERN criteria should be performed. ( CERN uses for instance MEGGER S1-5010 or MIT 525)
      • MCBRD01 was retested before shipment at Warm temperature after cool down at 447 V ( new value to be applied 330V) and both apertures show insulation level of about 1 GOhm just meeting the criteria.
      • MCBRDP2 (WST, VPI impregnated) test results summary shows better insulation to GND by factor 20 wrt wet winding.
      • Comment on IHEP test table p08: After any cold test it is not allowed to test ABOVE 330V.
    • Electrical design : CERN presented ( see slides) modifications on CERN prototype outer former and end rings which enhance insulation level to GND.  IHEP to analyse and give feedback on the design change.
    • QA discussion ( L Quain , CERN)
      •  Review of missing SC wire certificates, test reports , to be attached to series aperture MIPs
      • Open NCRs, 2507745  and 2554641 can be closed
      • All IHEP assets numbers are created , CERN dashboard template on line will be accessible and IHEP will use it as Asset numbers and nicknames.
    • 3- Review of electrical criteria EDMS 2363906 to be applied, under approval with Lorcan. Any deviation will be discussed and agreed after first version.

    Actions items

     

    • IHEP to analyse and give feedback on the CERN prototype design change.
    • IHEP to implement the CERN electrical test levels at BAMA and IMP respective withstand test levels BEFORE and AFTER cold test
    • To organise a technical discussion on the Wet winding and VPI process performed at IMP to understand detail process and limitations
    • To update information on BAMA requalification of the equipment after the move of factory
    • At next meeting to discuss the schedule for Bama coil production
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