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Persistent URL http://purl.org/net/epubs/work/38606796
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Record Id 38606796
Title Development of a Novel Supporting System for High Luminosity LHC SRF Crab Cavities
Abstract Compact SRF Crab Cavities are integral to the HL-LHC upgrade. This paper details the design of support structures within the SPS (Super Proton Synchrotron) Crab Cavity Cryomodule. For ease of alignment each cavity is supported with the mechanical tuner and RF Fundamental Power Coupler (FPC) via a common support plate. To reduce heat leak and remove bellows in the FPC it was determined that this would be the fixed support for the cavity. In addition, novel flexural blades were designed to give increased stiffness yet allow for thermal contraction of the cavity towards the fixed point of the FPC. This approach was superior when compared via simulation to several alternative techniques. A detailed simulation model was used for optimisation of directional stiffness, identification of vibration modes and minimising thermal stresses. A transmission matrix was developed to assess modal deflection for given ground vibration conditions. The spreadsheet gives an instantaneous yet comparable result to time consuming random vibration FE Analyses. The final engineering design of the supporting system is now complete and will also be described in this paper.
Organisation TECH , STFC
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Language English (EN)
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Paper In Conference Proceedings In 18th International Conference on RF Superconductivity (SRF2017), Lanzhou, China, 17-21 Jul 2017, (2017): 304-308. http://accelconf.…7/papers/mopb104.pdf 2017