Temperature control for an indirectly heated cathode for a high power electron beam gun
    2.
    发明授权
    Temperature control for an indirectly heated cathode for a high power electron beam gun 失效
    用于高功率电子束枪的间接加热阴极的温度控制

    公开(公告)号:US3885194A

    公开(公告)日:1975-05-20

    申请号:US35601873

    申请日:1973-04-30

    CPC classification number: G05F1/46 H01J37/06 H01J37/242

    Abstract: A method and apparatus for regulating and determining the temperature of a heated cathode in an electron beam system to regulate the magnitude of the beam current both during operation and prior to turn on. This is accomplished by measuring the thermionic emission of a well defined area of the cathode, regardless of whether the electron beam is being drawn from the cathode, and utilizing this measured signal to control the temperature of the heated cathode.

    Abstract translation: 一种用于调节和确定电子束系统中的加热阴极的温度的方法和装置,以在操作期间和接通之前调节束电流的大小。 这通过测量阴极的良好限定区域的热离子发射来实现,而不管电子束是否从阴极吸取,并且利用该测量信号来控制加热的阴极的温度。

    Distribution and cutting of rocks,glass and the like
    3.
    发明授权
    Distribution and cutting of rocks,glass and the like 失效
    岩石,玻璃和类似物的分布和切割

    公开(公告)号:US3556600A

    公开(公告)日:1971-01-19

    申请号:US3556600D

    申请日:1968-08-30

    CPC classification number: B28D1/221 E21C37/18 H01J37/301 Y10S65/04

    Abstract: A METHOD IS DISCLOSED FOR DRILLING HOLES, EXCAVATING AND/OR TUNNELING IN ROCKY TERRAIN OR CUTTING OR BREAKING UP ROCK OR GLASS WITH A CORPUSCULAR BEAM, OF ELECTRONS OR IONS OF HIGH ENERGY DENSITY, TYPICALLY EXCEEDING ABOUT 10**6 WATTS PER SQUARE CENTIMETER. THE BEAM IS PROJECTED INTO THE ATMOSPHERE FROM THE CHAMBER IN WHICH IT IS GENERATED. MOLTEN MATERIAL, FUMES AND DUST MAY BE BLASTED AWAY BY A STREAM OF GAS, WATER OR STEAM. THE SURFACE BEING IMPINGED BY THE BEAM MAY ADVANTAGEOUSLY BE UNDER WATER. THE PARTICLES OF THE BEAM MAY ALSO HAVE VERY HIGH ENERGY (ACCELERATING VOLTAGE ONE MILLION TO 100 MILLION VOLTS) TO PRODUCE A BLASTING EFFECT UNDER THE SURFACE OF THE MATERIAL BEING DISRUPTED.

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