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    WOWCC development meeting

    → Europe/Zurich
    Vidyo

    Vidyo
      • 14:00 → 14:15
        Update on fabrication 15m

        feedback on the design

        Speaker: Pierre Naisson (CERN)

         

         

        From: Pierre Naisson <pierre.naisson@cern.ch>
        Sent: 01 July 2020 12:12
        To: Marco Garlasche <Marco.Garlasche@cern.ch>; Fabio Avino <fabio.avino@cern.ch>; Alban Sublet <alban.sublet@cern.ch>; Tommi Mikkola <tommi.petteri.mikkola@cern.ch>; Miguel Navarro Baeza <miguel.navarro.baeza@cern.ch>
        Cc: Proj-HighGradientRF-CopperCrabCavity (Copper Crab Cavity project members) <Proj-HighGradientRF-CopperCrabCavity@cern.ch>
        Subject: WOW coating setup design review

         

        Hello

         

        Following the fruitful meeting this morning, please look at the minutes below. If you have any comment or feedback, please lt me know.

         

        Pierre, Fabio and Tommi give some context about the coating setup and requirements. Tommi brings some drawings to help discussion, showing the cavity assembled in the frame + coating setup as discussed during lats WOW meeting on June 25th.

        After some exchanges, here are the list of decision/action made:

        • Marco and Miguel will prepared the administrative documents (JMT job, purchase request….). We will proceed by steps to check the level of accuracy we can reach.
        • Supporting tubes:
          • The stainless tube, flanges and endcaps of the individual tube will be launched
          • A template 25-30mm thick 304 stainless steel will be cut out to mimic the narrower section of WOW cavity (mushroom area) to make insertion test fit, with +1mm regarding “optimal cathode position”, This could be remachined to +2mm if needed.
          • The 6m long tube can be cut then straighten within 0.3mm/m straightness
          • The end “H plate” connecting the 6 tube will be slightly redesign to accommodate a guiding pin than will align the end to the bottom bell
        • Bottom bell can be started
          • Just take into consideration the guiding pin (see above)
          • Standard rolled/welded tube can be used
          • Standard flange/window can be purchased
        • Lifting system
          • Slight redesign (simplification)
          • Production can be launch
        • Top bell
          • To be kept on hold, waiting for the straightness of the tube assembly
          • Breakers can be purchase, maybe with some extra for spares
          • Changing the design for bellows to accommodate the angular and planar misalignment could be interesting, but keeping in mind the space constrains and risks of peel off of coating in the below depending on the integration. Fabio an Alban would be very keen on this point. It also help limiting the stress on ceramics.

         

        Regards

         

        Pierre Naisson

        72/R-018

        62946   (+41 22 76 62946)

        161034 (+41 75 411 1034)

        pierre.naisson@cern.ch

         

      • 14:15 → 14:30
        update on coating 15m
        Speaker: Fabio Avino (CERN)
        20200720_WOW_Coating_update.pdf
        20200720_WOW_Coating_update.pptx
      • 14:30 → 14:45
        update on design 15m
        Speaker: Tommi Mikkola (CERN)
        Tommi_PPT_WOW_10072020.pdf
        Tommi_PPT_WOW_10072020.pptx
      • 14:45 → 15:00
        AOB 15m