Abstract

Particle transmission probabilities through vacuum ducts in molecular flow regime are dependent on the sticking probability of particles to the duct walls. Test particle Monte-Carlo (TPMC) simulations of transmission probabilities for various sticking coefficients are connected with considerable computational effort, since a separate simulation is necessary for each value. Here, we introduce a theoretical approach based on counting particle-wall interactions during transmission, which reduces the amount of simulations to a single run. Application of this calculation scheme to simulations of an elbow geometry, and statistical analysis of the simulation results are shown.

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