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The experimental devices ASDEX Upgrade (AUG) and Wendelstein 7‐X (W7‐X) are equipped with two neutral beam injectors each for plasma heating with up to 20MW. Four large titanium sublimation pumps (TSPs) (4×1.5×0.2m3) in each injector provide proper vacuum conditions (below 10−2Pa) during the 10s beam pulse with a gas feed of up to 30 Pa×m3/s. A maximum pumping speed of up to 3000m3/s for H2 is obtained...
The neutral beam injection (NBI) system for the magnetic confinement experiments ASDEX-Upgrade (AUG) and Wendelstein 7-X (W7-X) require a vacuum system with high pumping speed of up to 3000 m3/s for H2 and large capacity with a gas feed of up to 30 Pa×m3/s and 10 s. It must ensure a vacuum level of a maximum of 10−2 Pa in any section of the neutral beam line in order to avoid re-ionization losses...
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