Multiphysics analysis of side-coupled RF cavity

Abstract

A: By changing the resonant frequency of the cavity due to the power dissipation in its wall, the impedance matching will impair and the power will reflect. The acceptable frequency shift range which is based on the cooling system in the cavity design depends on the ability of the automatic frequency controller system and the bandwidth of the RF amplifier output frequency. This paper describes how to couple electromagnetic, thermal and mechanical analysis and calculates the cavity frequency shift during operation. Multiphysics analysis investigations had done for an S-band side-coupled cavity. By using the Superfish code, the power loss ratio at different surfaces of the cavity could be accurately calculated and Steady-State Thermal (SST) analysis could be performed correctly. In this paper, the report on the simultaneous use of multiphysics analysis with the modules of the Ansys software is presented and the results of both simulations are compared. The temperature distribution of the cavity was obtained by using the Fluent software and its results were compared with the temperature distribution gained from applying the convection coefficient to the SST. Three cooling systems were investigated for different powers with different cross-sections. In this section of the investigation, after thermal analysis, deformed geometry was obtained due to thermal stresses. By electromagnetic analyzing of deformed geometry, its frequency shift was obtained for all different cases. In order to evaluate the simulations, after the construction of a single-cavity, frequency variations are measured in terms of temperature variation and the results are compared with each other. After constructing a single-cavity, frequency shifts based on temperature variations are measured and the results are compared with each other. K: Acceleration cavities and magnets superconducting (high-temperature superconductor; radiation hardened magnets; normal-conducting; permanent magnet devices; wigglers and undulators); Accelerator modelling and simulations (multi-particle dynamics; single-particle dynamics);

Development of a novel approach for construction of high gradient braze-free S-band cavities

“…For obtaining total deformation of the cavity, the complete set of discs and cylindrical waveguide were simulated from the contact temperature to the environment temperature. After obtaining deformed geometry, the frequency change was obtained by coupling SST and SS module with HFSS 26 . Figure 10 shows the process of coupling HFSS, steady state thermal (SST) and static structural in Ansys workbench for obtaining the frequency change.…”

Construction and measurement of the prototype side-coupled standing-wave tube for electron Linac

“…Beam dynamics studies have been carried out by using ASTRA [7]. The results of studies, simulations and designs are in the references [4,[8][9][10].…”