| AVS 56th International Symposium & Exhibition | |
| Vacuum Technology | Wednesday Sessions |
| Session VT-WeA |
| Session: | Modeling and Accelerators |
| Presenter: | S. Varoutis, Forschungszentrum Karlsruhe (FZK), Germany |
| Authors: | S. Varoutis, Forschungszentrum Karlsruhe (FZK), Germany V. Hauer, Forschungszentrum Karlsruhe (FZK), Germany C. Day, Forschungszentrum Karlsruhe (FZK), Germany |
| Correspondent: | Click to Email |
Vacuum flows are strongly connected to several subsidiary systems of fusion reactors. In particular, there are high vacuum pumping systems for evacuation and maintenance of the needed low pressure levels in the torus, in the cryostat and in the neutral beam injectors. Each vacuum system consists of networks of various channels with different lengths and cross sections. The flow in such channels varies from the free molecular regime up to the hydrodynamic limit. In the present work, an experimental setup for measuring the mass flow rate of gases is proposed. Its principle is based on the predefined conductance through the duct and the measurement of the corresponding pressure difference. Experimental data for channels with various lengths and cross sections are presented and compared with corresponding numerical results based on the linearized kinetic BGK equation and the direct simulation Monte Carlo method (DSMC). It is noted that in all cases a very good agreement between experimental and numerical approaches, is observed.