Keyword: superconducting-RF
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TUPAG14 Constrained Multi-Objective Shape Optimization of Superconducting RF Cavities to Counteract Dangerous Higher Order Modes cavity, dipole, HOM, impedance 293
 
  • M. Kranjcevic, P. Arbenz
    ETH, Zurich, Switzerland
  • A. Adelmann
    PSI, Villigen PSI, Switzerland
  • S. Gorgi Zadeh, U. van Rienen
    Rostock University, Faculty of Computer Science and Electrical Engineering, Rostock, Germany
  
  High cur­rent stor­age rings, such as the Z op­er­at­ing mode of the FCC-ee, re­quire su­per­con­duct­ing radio fre­quency (RF) cav­i­ties that are op­ti­mized with re­spect to both the fun­da­men­tal mode and the dan­ger­ous higher order modes. In order to op­ti­mize the shape of the RF cav­ity, a con­strained multi-ob­jec­tive op­ti­miza­tion prob­lem is solved using a mas­sively par­al­lel im­ple­men­ta­tion of an evo­lu­tion­ary al­go­rithm. Ad­di­tion­ally, a fre­quency-fix­ing scheme is em­ployed to deal with the con­straint on the fre­quency of the fun­da­men­tal mode. Fi­nally, the com­puted Pareto front ap­prox­i­ma­tion and an RF cav­ity shape with de­sired prop­er­ties are shown.  
slides icon Slides TUPAG14 [3.001 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-ICAP2018-TUPAG14  
About • paper received ※ 19 October 2018       paper accepted ※ 10 December 2018       issue date ※ 26 January 2019  
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