Microscopic high-speed liquid-metal jets in vacuum |
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Authors: | M Otendal O Hemberg T T Tuohimaa H M Hertz |
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Institution: | (1) Biomedical and X-Ray Physics, Royal Institute of Technology, KTH Albanova, 106 91 Stockholm, Sweden |
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Abstract: | The operation of microscopic high-speed liquid-metal jets in vacuum has been investigated. We show that such jets may be produced
with good stability and collimation at higher speeds than previously demonstrated, provided that the nozzle design is appropriate
and that cavitation-induced instabilities are avoided. The experiments with a medium-speed tin jet (u ∼ 60 m/s, Re=1.8×104, Z=2.9×10−3) showed that it operated without any signs of instabilities, whereas the stability of high-speed tin jets (d=30 μm, u=500 m/s, Re=5.6×104, Z=4.7×10−3) has been investigated via dynamic similarity using a water jet. Such a 500-m/s tin jet is required as the anode for high-brightness
operation of a novel electron-impact X-ray source. |
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