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    • 11. 发明公开
    • BRIGHT AND DURABLE FIELD EMISSION SOURCE DERIVED FROM REFRACTORY TAYLOR CONES
    • HELLE UND DAUERHAFTE FELDEMISSIONSQUELLE AUS FEUERFESTEN TAYLOR-KEGELN
    • EP3066680A4
    • 2017-07-05
    • EP14860789
    • 2014-11-07
    • HIRSCH GREGORY
    • HIRSCH GREGORY
    • H01J49/04H01J1/304H01J9/02H01J37/073H01J37/08
    • H01J37/073H01J1/304H01J1/3044H01J9/025H01J37/08H01J2201/30411H01J2237/0805
    • A method of producing field emitters having improved brightness and durability relying on the creation of a liquid Taylor cone from electrically conductive materials having high melting points. The method calls for melting the end of a wire substrate with a focused laser beam, while imposing a high positive potential on the material. The resulting molten Taylor cone is subsequently rapidly quenched by cessation of the laser power. Rapid quenching is facilitated in large part by radiative cooling, resulting in structures having characteristics closely matching that of the original liquid Taylor cone. Frozen Taylor cones thus obtained yield desirable tip end forms for field emission sources in electron beam applications. Regeneration of the frozen Taylor cones in-situ is readily accomplished by repeating the initial formation procedures. The high temperature liquid Taylor cones can also be employed as bright ion sources with chemical elements previously considered impractical to implement.
    • 一种制造具有改进的亮度和耐久性的场致发射体的方法依赖于由具有高熔点的导电材料形成液体泰勒锥体。 该方法要求用聚焦激光束熔化线基底的端部,同时在材料上施加高的正电位。 随后通过停止激光功率使得到的熔融泰勒锥体迅速淬火。 快速淬火在很大程度上通过辐射冷却促进,导致具有与原始液体泰勒锥相匹配的特征的结构。 由此获得的冷冻泰勒锥体在电子束应用中产生用于场发射源的期望的尖端形式。 通过重复最初的形成程序可以容易地实现冷冻泰勒锥原位再生。 高温液体泰勒锥也可以用作先前被认为不切实际实施的化学元素的明亮离子源。