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    26th WP8 Bi-weekly meeting (2015-16) [services & support @ CMS TAXS]

    → Europe/Zurich
    530/R-030 - BE-EA Conference Room (CERN)

    530/R-030 - BE-EA Conference Room

    CERN

    35
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    Description
    Discussion about the HL-LHC TAXS vacuum lay-out in CMS. Services routing, alignment & space allocations.
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    Presents : Michael Lazaronni, Andrea Gaddi, Christian Boccard, Joel Albertone, Dirk Mergelkuhl, Ilias Efthymiopoulos, Damien Brethoux, Lukasz Krempek, Francisco Sanchez Galan

    • Current design is based on DN 63 valves. If TAXs aperture is larger than 57 mm the alignment of the last valve could be difficult.
    • Andrea Gaddi questioned about the size of pipings needed at CMS. He pointed out that for the filling pipe baking should be provided, while for the pumping-down/venting pipe this is not needed. In general terms, a reduction of pipe sizing would be benefical for CMS
    • Andrea commented that the ionic pump at 15 m is being evaluated by CMS, it could be displaced to the vicinity of the relocated VAX. Cablings should be looked in detail.
    • Current proposal is to use staubli connections including all the different elements. Christian pointed out that BPM requires a coax connection.
    • Ilias pointed out that alignment rods could be placed within the shielding in order to measure the positioning of the different elements. Dirk precised that the rods aren't used , the current system uses survey targets placed 20 mm over the TAS.
    • There is an uncertainity about the movements of the FIN since its installation. Survey could prepare. Eventually, new targets could be placed on it.
    • Ilias will prepare a model to allow RP simulations concerning the activation of the different elements.

    Notes by Francisco Sanchez Galan

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