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热词
    • 8. 发明授权
    • Indirectly heated cathode for a gas discharge tube
    • 用于气体放电管的间接加热阴极
    • US5159236A
    • 1992-10-27
    • US769489
    • 1991-10-01
    • Koji Kawai
    • Koji Kawai
    • H01J61/067H01J1/20H01J61/09H01J61/68
    • H01J1/20
    • An indirectly heated cathode incorporated in a gas discharge tube with a discharge current of 0.2 to 0.4 A has a cathode surface area in a range of 10 to 30 mm.sup.2. A cathode cylinder is made of molybdenum, nickel or alloy thereof. A heater coated with alumina for insulation is inserted into the cylinder in such a manner that the distance between the heater and cylinder is 0.1 mm or less, and coil gaps of the heater are set to 0.15 mm or less. Alternatively, the space between the heater and cylinder is filled with alumina. As a result, the ratio of a heat quantity by forced heating to a heat quantity for starting discharge is made 0.3 or less.
    • 掺入放电电流为0.2〜0.4A的气体放电管中的间接加热的阴极的阴极表面积为10〜30mm 2。 阴极筒由钼,镍或其合金制成。 涂有氧化铝绝缘的加热器以加热器和气缸之间的距离为0.1mm或更小的方式插入气缸中,加热器的线圈间隙设定为0.15mm以下。 或者,加热器和气缸之间的空间填充有氧化铝。 结果,通过强制加热的热量与开始放电的热量的比例为0.3以下。