| 摘要 |
PROBLEM TO BE SOLVED: To provide an electron beam emission tube having such effects that an electron emission tube can be constituted comparatively small, that an irradiation window and a peripheral part of the irradiation window can be cooled effectively, and that the service life span of the electron beam emission tube determined by damage to the irradiation window can be elongated. SOLUTION: This tube is constituted as follows: a head part 12 is constituted so as to have a cylindrical body 15 having the irradiation window 11, and a ring body 16 interfitted with the cylindrical body at the center part; a recessed part working as a cooling water channel 17 is formed over the outer periphery near the irradiation window of the cylindrical body; the cylindrical body is constituted so as to have a channel check plate on a part of the recessed part; a cooling water introduction channel and a drainage channel are formed on the ring body; and the cylindrical body is interfitted with the ring body so that the channel check plate is positioned between the cooling water introduction channel and a distribution channel, to thereby form a continuous cooling water channel from the cooling water introduction channel to the drainage channel via the periphery of the irradiation window. COPYRIGHT: (C)2004,JPO
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