V.V. Paramonov, L.V. Kravchuk (INR), K. Floettmann (DESY)
Due to some beam dynamic requirement, accelerating cavities for TESLA injector linacs should be embedded into solenoid magnetic field and TESLA superconducting cavities can not be applied. Consideration shows the Cut Disk Structure (CDS) as a good option for TESLA normal conducting accelerating cavities. The structure cells shape has been optimised at operating frequency 1300 MHz for different accelerating gradients and beam bore hole diameters. Results of the thermal stress analysis show the ability to operate with high accelerating gradient (up to 14 MV/m) and long ( 800 mks) rf pulse. Different options for the structure segmentation, both single cavities and cavities with coupling bridges, are considered. Design parameters for CDS normal conducting cavities are presented.
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