Author: Schussman, G.L.
Paper Title Page
MOOCS2 Numerical Verification of the Power Transfer and Wakefield Coupling in the CLIC Two-beam Accelerator 51
 
  • A.E. Candel, K. Ko, Z. Li, C.-K. Ng, V. Rawat, G.L. Schussman
    SLAC, Menlo Park, California, USA
  • A. Grudiev, I. Syratchev, W. Wuensch
    CERN, Geneva, Switzerland
 
  The Compact Linear Collider (CLIC) provides a path to a multi-TeV accelerator to explore the energy frontier of High Energy Physics. Its two-beam accelerator concept envisions large complex 3D structures, which must be modeled to high accuracy so that simulation results can be directly used to prepare CAD drawings for machining. The required simulations include not only the fundamental mode properties of the accelerating structures but also the Power Extraction and Transfer Structure (PETS), as well as the coupling between the two systems. Time-domain simulations will be performed to understand pulse formation, wakefield damping, fundamental power transfer and wakefield coupling in these structures. Applying SLAC's parallel finite element code suite, these large-scale problems will be solved on some of the largest supercomputers available. The results will help to identify potential issues and provide new insights on the design, leading to further improvements on the novel two-beam accelerator scheme.  
slides icon Slides MOOCS2 [286.042 MB]  
 
TUODN5
High Fidelity Calculation of Wakefields for Short Bunches  
 
  • C.-K. Ng, A.E. Candel, K. Ko, V. Rawat, G.L. Schussman, L. Xiao
    SLAC, Menlo Park, California, USA
 
  Funding: Work supported by DOE ASCR, BES & HEP Divisions under contract DE-AC02-76SF00515.
The determination of wakefields for short bunches in accelerator structures with complex geometries and large spatial dimensions requires significant computational resources. The time domain code T3P developed at SLAC employs the higher-order finite element method for high fidelity modeling and parallel computation for large-scale simulation on state-of-the-art supercomputers. To facilitate wakefield calculation for short bunches, T3P has been enhanced through the implementation of a moving window technique which reduces computing resource requirements by orders of magnitude. For local refinement in the moving window, both a finer unstructured mesh and higher-order finite element basis functions can be employed. Applications demonstrating the efficacy of the technique include wakefield calculations of shallow tapers in storage rings, complex and long vacuum chamber transitions in energy recovery linacs (ERL) and higher-order-mode (HOM) couplers in superconducting rf cavities.
 
slides icon Slides TUODN5 [144.213 MB]