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Description
The 6D cooling section of a Muon Collider is essential to produce a high-brightness muon beam. To demonstrate the technological feasibility of this system, the IMCC has started a Muon Cooling Demonstrator programme. Within the programme, test stands integrating 3 GHz RF cavities and superconducting solenoids will be developed to test the RF breakdown limit in a 7 T background magnetic field. As key part of the programme, a cooling cell module based on the B5 cell type is currently under study, to validate at engineering scale the integration of a B5-like cooling cell.
The magnets of the test stand and B5-like demonstrator are based on non-insulated high-temperature superconductors (HTS) operating at 20 K. The test stand consists of 250 mm bore split solenoid, generating 7 T field on-axis and gradient of nearly 70 T/m in alternate-polarity mode. It will serve as a proof of technology for the B5-like demonstrator, which consists of two pairs of split solenoids with 370 mm and 570 mm bores, designed to produce a precise magnetic field profile with on-axis field swing of ± 7.3 T, within a compact integration, subject to strong axial forces in the MN range.
In this work, the engineering design of the solenoids of the B5-like demonstrator is presented along with the main design parameters of the RF test facility (RFMFTF v3.2). A focus is given to the technological solutions considered in the design, accounting for the compact magnet layout required for cooling cell integration.
Footnotes
Funded by the European Union (EU). Views and opinions expressed are however those of the author only and do not necessarily reflect those of the EU or European Research Executive Agency (REA). Neither the EU nor the REA can be held responsible for them.
Endorsed by the IMCC (International Muon Collider Collaboration).
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