THE VACUUM-SYSTEM OF THE TJ-II STELLARATOR

In this paper, the conceptual design of the vacuum system (pumping and measurement) of the TJ-II stellarator is presented. A detailed descri ption of the specific problems associated with the peculiarities of th e machine and the proposed solutions are given. Examples of these pecu liarities are: the outgassing behaviour of the plasma-facing component s during and after the plasma shots, the coupling of the pumping syste m to the vacuum vessel, and the suitability of the proposed system for the different modes of operation.