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TID Computational Electrodynamics


AD SLACPortal > Accelerator Research Division > TID Computational Electrodynamics


Code Development 


Complex eigenvalue solver for finding the normal modes in an RF cavity
S-parameter solver to calculate the transmission in open structures
Time-domain solver for transient response to driven fields and beam excitations of wakefields


Particle tracking code with surface physics to study multipacting and dark current.

Particle-in-cell code to simulate self-consistent electrodynamics of charged particle beams


Multi-physics module to perform integrated electromagnetic, thermal, and mechanical analysis






  ACE3P capabilities:

Omega3P/S3P can be used to optimize RF parameters, reduce peak surface fields, calculate HOM damping, find trapped modes & their heating effects, design dielectric & ferrite dampers, and others 

T3P uses a driving bunch to evaluate the broadband impedance, trapped modes and signal sensitivity of a beamline component, compute the wakefields of Short bunches with a moving window in 3D Long tapered structures, simulate the beam transit in Large 3D complex structures consisting of lossy dielectrics and terminated in open waveguides (broadband waveguide boundary conditions)

Track3P studies multipacting in cavities & couplers by identifying MP barriers, MP sites and the type of MP trajectories.   

Pic3P calculates the beam emittance in the RF gun design.

TEM3P solves the multiphysics problem involving RF, thermal and mechanical issues 




Parallel Higher-Order Finite-Element Method

This approach provides

  •  Conformal Tetrahedral meshing with quadratic surface
  •  Higher-order elements (p = 1-6)
  •  Parallel processing (memory & speedup)

that are needed for Virtual Prototyping of Accelerator Structures which requires

  •  Complexity - HOM coupler (fine features) versus cavity
  •  Problem size - multi-cavity structure, e.g. cryomodule
  •  Accuracy - 10s of kHz mode separation out of GHz
  •  Speed - Fast turn around time to impact design






 ACD Links


SLAC SLAC National Accelerator Laboratory, Menlo Park, CA
Operated by Stanford University for the U.S. Dept. of Energy