著者

橘 房夫

出版者

公益社団法人 応用物理学会

雑誌

応用物理 (ISSN:03698009)

巻号頁・発行日

vol.29, no.9, pp.592-600, 1960-09-10 (Released:2009-02-20)

参考文献数

15

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Cold-cathode type X-ray tubes with auxiliary triggering electrode are developed which can produce X-rays of sufficiently high intensity with short duration of the order of one μ sec. To. get fine definition in the photogram, the anode of conical shape is used, and the most efficient condition of gap length between cathode and anode is investigated experimentally. By means of this X-ray apparatus combined with some suitable electronic delay circuit (3μ sec_??_10m sec) for triggering, X-ray shadowgrams corresponding to various stages of electrical explosion of fine metallic wires (fuse metal, copper, steel etc.) and thin aluminium foils are studied. When the electric current density through the wire is small, it is observed that, some-undulatory deformation of the wire takes place, resulting to the splitting of the wire into many fine droplets. In the early stage of explosion of copper wire coated with tin, its length is greatly increased and takes irregular zig-zag form, while its diameter remains the same as original. If the electrical energy in the wire is sufficiently high, sudden explosive vaporization occurs without any undulatory deformation or droplets formation.