Becker, U.

Paper	Title	Page
TUAPMP04	Simulation of Secondary Electron Emission with CST Particle Studio(TM)	160
	F. Hamme, U. Becker, P. Hammes CST, Darmstadt
	In accelerator physics and high power vacuum electronics the secondary electron emission (SEE) has in many cases an important influence on the physical behavior of the device. Since its analytical prediction even for simple geometries is extremely cumbersome, numerical simulation is essential to get a better understanding of the possible effects and ideas to change the design. The current paper introduces the implementation of SEE within the code CST Particle Studio (TM), which is an easy to use three dimensional tool for the simulation of electromagnetic fields and charged particles. There are three basic types of secondary electrons, the elastic reflected, the rediffused and the true secondary ones. The implemented SEE model is based on a probabilistic, mathematically self-consistent model developed by Furman and includes the three kinds of secondary electrons mentioned above. The paper presents simulation results with focus to the SEE for the absorbed power within an electron collector of a high power tube. As second example the secondary emission process is studied within the superconducting TESLA cavity, which gives some hints for the understanding of multipactor effects in those cavity and filter structures.
	Slides
WESEPP01	CST's Commercial Beam-Physics Codes	228
	U. Becker CST, Darmstadt
	During the past decades Particle Accelerators have grown to higher and higher complexity and cost, so that a careful analysis and understanding of the machines' behaviour becomes more and more important. CST offers userfriendly numerical simulation tools for the accurate analysis of electromagnetic fields in combination with charged particles, including basic thermal analysis. The CST STUDIO SUITE code family is the direct successor of the code MAFIA, combining the numerical accuracy of the Finite Integration Theory and Perfect Boundary Approximation within an intuitive, easy-to-use CAD environment. Automatic Parameter Sweeping and Optimization are available to achieve and control the design goals. In this paper various solver modules of CST PARTICLE STUDIO, CST EM STUDIO and CST MICROWAVE STUDIO will be presented along accelerator-relevant examples, such as: Cavity design using eigenmode solver including calculation of losses, Q-factors, shunt impedance and thermal analysis. Coupler Design, including external Q-factor Wakefield Simulation, including resistive wall effects, also realized for beams slower than speed of light dispersion diagram for the analysis of periodic structures design of guns, including beam emittance studies study of secondary emission processes and dark current effects in accelerating structures.
THM2IS03	CST's Commercial Beam-Physics Codes	308
	U. Becker CST, Darmstadt
	During the past decades Particle Accelerators have grown to higher and higher complexity and cost, so that a careful analysis and understanding of the machines' behaviour becomes more and more important. CST offers userfriendly numerical simulation tools for the accurate analysis of electromagnetic fields in combination with charged particles, including basic thermal analysis. The CST STUDIO SUITE code family is the direct successor of the code MAFIA, combining the numerical accuracy of the Finite Integration Theory and Perfect Boundary Approximation within an intuitive, easy-to-use CAD environment. Automatic Parameter Sweeping and Optimization are available to achieve and control the design goals. In this paper various solver modules of CST PARTICLE STUDIO, CST EM STUDIO and CST MICROWAVE STUDIO will be presented along accelerator-relevant examples, such as: Cavity design using eigenmode solver including calculation of losses, Q-factors, shunt impedance and thermal analysis. Coupler Design, including external Q-factor Wakefield Simulation, including resistive wall effects, also realized for beams slower than speed of light dispersion diagram for the analysis of periodic structures design of guns, including beam emittance studies study of secondary emission processes and dark current effects in accelerating structures.
	Slides