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    DEMO2 testing : status of installations

    → Europe/Zurich
    Marta Bajko (CERN)
    DEMO 2 Test.pod
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    DEMO 2 spec refresh and morphology of the by Jerome Fleiter:

    A draft test plan will be prepared by M. Duda in collaboration with J. Fleiter.

    • 1st test: 18 kA circuit powered from CFB Cluster G, 7 kA circuit (making use 2 of the 3 cables) powered from DDFH.
    • 2nd test: 18 kA circuit powered from CFB Cluster G, 2 kA circuit (making use of all the 2 kA cables) powered from DDFH. Extended test with quench testing and cross talk tests. 

     

    Planning and actions:

    1. Restart of the works according to the planning provided by J. Fleiter. Around two weeks of work in the splicing and instrumentation. SCD team lead by A. Gharib.

     

    1. The welder from SCD (FSU) might not be back to work in time for the closure of the coldmass. If that is the case, one coming from the main workshop will be recruited. These works are foreseen end of May if we start again on the 11th of May.

     

    1. The interconnection plates are designed (this I know from a meeting with Robin) and ready to manufacture. Still to confirm if raw blocks of copper are ordered or if there is available stock in the mechanical workshop of TF. To be reviewed by Patrick V., Jerome Fleiter and Robin Betemps.

     

    1. The length needed for the cables was measured in place and we stick to the plan of using 12+5m. We are going to check if we can use the already connected 5 m cables of bench A2, instead of using the 5 m length stocked in the building. Jerome Feuvrier and Patrick V. will be in charge.

    The position for the scaffolding will be reviewed on site with Ouvaroff, Jerome Feuvrier and Patrick V (no need of big planning and drawings).

    According to the plan, the scaffolding should be put in place the first week of June if we start again on the 11th of May. That would imply contacting Ouvaroff two weeks before. By now, we still don't know if the external companies will be available and back to work for that time.

     

    1. The interlocks of cluster G and cluster A will be ¨interlocked¨ together in series. The new interlock requires some cabling in the cluster A side in order to connect to the existing safety matrix. The new system has to be tested before operation. Marylin is in charge of this.

     

    1. The DAQ used will be the one in cluster G for the CFB of the link. Jerome Feuvrier is in charge of this.

     

    1. The test is going to be very DMM demaning. Available systems in SM18 can handle up to 40 signals (4 DMMs). Jerome Feuvrier is in charge of this, input from J. Fleiter is needed.

     

    1. The 2 kA power converter needed for the second test will be provided by EPC with a delay of around 1 month after the reopening (as stated by Samer).  Jerome Feuvrier and Patrick V. will take care of it.
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