2011 Particle Accelerator Conference - List of Authors (Wuensch, W.)

Paper

Title

Page

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 MOOCS2 [286.042 MB]

THP083

Fabrication and Design of the Main Linacs for CLIC with Damped and Detuned Wakefield Suppression and Optimised Surface Electromagnetic Fields

2291

R.M. Jones, A. D'Elia, V.F. Khan
UMAN, Manchester, United Kingdom
A. Grudiev, G. Riddone, W. Wuensch
CERN, Geneva, Switzerland

Funding: Research leading to these results has received funding from the European commission under the FP7 research infrastructure grant no. 227579.
We report on the suppression of long-range wakefields in the main linacs of the CLIC collider. This structure operates with a 120 degree phase advance per cell. The wakefield is damped using a combination of detuning the frequencies of beam-excited higher order modes and by light damping, through slot-coupled manifolds. This serves as an alternative to the present baseline CLIC design which relies on heavy damping. Detailed simulations of both the optimised surface fields resulting from the monopole mode, and from wakefield damping of the dipole modes, are discussed. We report on fabrication details of a structure consisting of 24 cells, diffusion bonded together. This design, known as CLIC_DDS_A, takes into practical mechanical engineering issues and is the result of several optimisations since the earlier CLIC_DDS designs. This structure is due to be tested for its capacity to sustain high gradients at CERN.

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 MOOCS2 [286.042 MB]

THP083	Fabrication and Design of the Main Linacs for CLIC with Damped and Detuned Wakefield Suppression and Optimised Surface Electromagnetic Fields	2291
	R.M. Jones, A. D'Elia, V.F. Khan UMAN, Manchester, United Kingdom A. Grudiev, G. Riddone, W. Wuensch CERN, Geneva, Switzerland
	Funding: Research leading to these results has received funding from the European commission under the FP7 research infrastructure grant no. 227579. We report on the suppression of long-range wakefields in the main linacs of the CLIC collider. This structure operates with a 120 degree phase advance per cell. The wakefield is damped using a combination of detuning the frequencies of beam-excited higher order modes and by light damping, through slot-coupled manifolds. This serves as an alternative to the present baseline CLIC design which relies on heavy damping. Detailed simulations of both the optimised surface fields resulting from the monopole mode, and from wakefield damping of the dipole modes, are discussed. We report on fabrication details of a structure consisting of 24 cells, diffusion bonded together. This design, known as CLIC_DDS_A, takes into practical mechanical engineering issues and is the result of several optimisations since the earlier CLIC_DDS designs. This structure is due to be tested for its capacity to sustain high gradients at CERN.