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Musicc3d: a 3d code for modeling Multipacting

Musicc3d: a 3d code for modeling Multipacting. Hamelin Thibault. Outline. Principle of calculation with MUSICC3D Outputs of MUSICC3D. Introduction of M ultipacting MUSICC3D software. Simulation of Spiral 2 cavities Simulation of Spoke cavities for ESS project

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Musicc3d: a 3d code for modeling Multipacting

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  1. Musicc3d: a 3d code for modeling Multipacting • Hamelin Thibault Unité mixte de recherche CNRS-IN2P3 Université Paris-Sud91406 Orsay cedex Tél. : +33 1 69 15 73 40 Fax : +33 1 69 15 64 70 http://ipnweb.in2p3.fr

  2. Outline • Principle of calculation with MUSICC3D • Outputs of MUSICC3D • Introduction of Multipacting • MUSICC3D software • Simulation of Spiral 2 cavities • Simulation of Spoke cavities for ESS project • Conclusions and perspectives

  3. Principle of Multipacting Cycle conditions • Secondary Emission Yield (SEY)

  4. Representation of Multipacting Multipacting’s susceptibility zones calculated for copper (colours represents the SEY) Electric peakfield Parallel plate Frequency gap

  5. Representation of Multipacting Multipacting’s susceptibility zones calculated for copper (colours represents the SEY) Electric peakfield Frequency gap

  6. Representation of Multipacting Multipacting’s susceptibility zones calculated for copper (colours represents the SEY) Electric peakfield Frequency gap

  7. Representation of Multipacting Multipacting’s susceptibility zones calculated for copper (colours represents the SEY) Electric peakfield Frequency gap

  8. 3D Aspect • Structures have complex 3D geometries • Need to use 3D software for Multipacting HF cavities for particle accelerator Microwave circuits on satellites HF amplifier

  9. Outline • Principle of calculation with MUSICC3D • Outputs of MUSICC3D • Introduction of Multipacting • MUSICC3D software • Simulation of Spiral 2 cavities • Simulation of Spoke cavities for ESS project • Conclusions and perspectives

  10. Principle of calculation with musicc3d Visualisation of electron’s trajectory (MUSICC3D) • Developed at IPNO • Any 3D geometries (one or more materials) • 3D tetrahedral meshing • HF field imported from an external field solver • Based on the Runge Kutta method and solve trajectories of electrons with the relativistic equation of motion • Model of virtual charge • The integrations over the multi differential SEY (Ein, ain, Eout, aout) is done with the Montecarlo method.

  11. Outputs of musicc3d

  12. Outline • Principle of calculation with MUSICC3D • Outputs of MUSICC3D • Introduction of Multipacting • MUSICC3D software • Simulation of Spiral 2 cavities • Simulation of Spoke cavities for ESS project • Conclusions and perspectives

  13. Simulation of Spiral 2 cavity • Cavity (l/4) in testing at IPNO for the new particle accelerator in GANIL (f = 88 MHz) (E = 4.78*Eacc)

  14. Simulation of Spiral 2 cavity • Cavity (l/4) in testing at IPNO for the new particle accelerator in GANIL (f = 88 MHz) (E = 4.78*Eacc)

  15. Simulation of Spiral 2 cavity • Cavity (l/4) in testing at IPNO for the new particle accelerator in GANIL (f = 88 MHz) (E = 4.78*Eacc)

  16. Simulation of Spiral 2 cavity In red : MUSICC3D simulations In blue : experimental measures • Cavity (l/4) in testing at IPNO for the new particle accelerator in GANIL (f = 88 MHz) (E = 4.78*Eacc)

  17. Outline • Principle of calculation with MUSICC3D • Outputs of MUSICC3D • Introduction of Multipacting • MUSICC3D software • Simulation of Spiral 2 cavities • Simulation of Spoke cavities for ESS project • Conclusions and perspectives

  18. Simulation of spoke cavity for ess project • IPNO is in charge of the design of new Spoke cavities for the ESS project (f = 352 MHz)

  19. Simulation of spoke cavity for ess project • IPNO is in charge of the design of new Spoke cavities for the ESS project (f = 352 MHz) (E = 4.84*Eacc)

  20. Simulation of spoke cavity for ess project • IPNO is in charge of the design of new Spoke cavities for the ESS project (f = 352 MHz) (E = 4.84*Eacc)

  21. Simulation of spoke cavity for ess project • IPNO is in charge of the design of new Spoke cavities for the ESS project (f = 352 MHz) (E = 4.84*Eacc)

  22. Simulation of spoke cavity for ess project • IPNO is in charge of the design of new Spoke cavities for the ESS project (f = 352 MHz) (E = 4.84*Eacc)

  23. Outline • Principle of calculation with MUSICC3D • Outputs of MUSICC3D • Introduction of Multipacting • MUSICC3D software • Simulation of Spiral 2 cavities • Simulation of Spoke cavities for ESS project • Conclusions and perspectives

  24. Conclusions and perspectives Conclusions Perspectives • Prediction Multipacting zones • Electric peak field • Location • Multiple output • 2D or 3D trajectories • Charges • Phases • Number of collision • Collision energy • Conception and fabrication of the demonstrator allows the study of Multipacting • Characterisation of the varied SEY materials • Multipacting study according to the different states of the matter’s surfaces

  25. Thank you for your attention

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