Abstract
JHF/NSP joint project managed by KEK and JAERI has been proposed with a superconducting proton linac. Because elliptical superconducting cavities for lower velocity have the flattered shape, mechanical properties against the vacuum load and the Lorentz force detuning are very important. In addition to this, thermal stress caused by different expansion coefficients of Niobium and stainless steel needs to be evaluated at the cryogenic temperature. In this paper, mechanical characteristics of superconducting cavities are studied by using structural and electromagnetic analysis.
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