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- W2597942780 abstract "The Tokamak à Configuration Variable (TCV) has been recently equipped with a 1 MW neutral beam heating (NBH) injector A. Fasoli for the TCV team, 2015 [1]. Two new stainless steel ports with rectangular aperture of 170 × 220 mm have been manufactured and installed for this purpose. The NBH injector is connected to one of them via a stainless steel port extension. The port and its extension together form the beam duct between the TCV vacuum vessel (VV) and the NBH injector. A preliminary thermal analysis of the beam duct showed no expectation of thermal events such as overheating. Indeed, although the beam power density near the internal faces of the beam duct reaches ∼10 MW/m2, the very grazing incidence angle between the beam axis and the wall was expected to lead to a maximal effective heat flux of ∼350 kW/m2 for a maximal duration of 2 s, resulting in acceptable temperature rise. As a result, the beam duct did not include any provision for cooling. However, early in 2016 the commissioning of the NBH injector showed high overheating of the port extension, resulting in local melting and ultimately vacuum leak. This paper describes the design and analysis of an actively cooled beam duct and the status of the beam duct." @default.
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- W2597942780 date "2017-11-01" @default.
- W2597942780 modified "2023-10-13" @default.
- W2597942780 title "Beam duct for the 1 MW neutral beam heating injector on TCV" @default.
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- W2597942780 doi "https://doi.org/10.1016/j.fusengdes.2017.03.044" @default.
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