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In this paper, we demonstrate that the local electric field distribution at a sharp tip can be drawn as a contour map and it agrees well with numerical calculations based on finite element method (FEM). In the Rutherford scattering scheme, when the primary electron beam passes close to the tip apex, it is strongly deflected toward the anode by the local field and is interrupted at the orifice edge...
It was previously reported that an ultra sharp emitter can be fabricated during field emissions from a multi-walled carbon nanotube embedded in a conventional electrolytic polished tungsten probe, where the Joule heating of the emission current softens the tungsten tip, and coulomb attraction to the nanotube finery pulled from the tungsten tip resulted in an ultra sharp apex of the tungsten probe,...
In safety design of the international thermonuclear experimental reactors (ITER) against loss of coolant/flow accidents, a target accuracy of 15% in decay heat prediction for baffle plates made of tungsten is required. To judge whether the target accuracy was achievable or not, a decay heat experiment featuring low-energy neutron induced 187 W production was performed as a part of...
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