Liquid Metal Lithium Jet Experiment for IFMIF Target

概要

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This paper reports an experimental study of a liquid lithium (Li) target for the International Fusion Materials Irradiation Facility (IFMIF). Experiments on the Li jet were conducted at a Li loop facility. The test section was a 10-mm-thick and 70-mm-wide flat plane jet along a straight channel. The Li jet free surface was photographed using a CCD camera and a stroboscopic light source. To investigate free surface wakes, measurement of the thickness distribution, analyses of the wake, and numerical calculations were conducted and compared. Results demonstrated that the generation of the wake depended strongly on wettability between Li and the structural material, which is 304 SS; the analytical model described the shape well. From the viewpoint of IFMIF design, the surface wake generated at the nozzle corner had a negligible effect on the surface shape of the D+ beam irradiation region in IFMIF.