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    • 2. 发明授权
    • X-ray fluorescence apparatus
    • X射线荧光装置
    • US06711234B1
    • 2004-03-23
    • US10130586
    • 2002-05-16
    • Neil LoxleyDavid Keith BowenLadislav Pina
    • Neil LoxleyDavid Keith BowenLadislav Pina
    • G21K106
    • G01N23/223G01N2223/076
    • This invention relates to a portable apparatus for carrying out X-ray fluorescence spectrometry on specimen materials at a distance from the apparatus. The apparatus comprises an X-ray generating tube, such as a microfocus tube, and two paraboloidal X-ray reflecting mirrors. The first collecting mirror is positioned in close coupled arrangement adjacent to the exit window of the tube, such that it emits parallel X-ray radiation to the second focusing mirror, which is aligned on the axis of and spaced apart from the first mirror (11). The second mirror (12) collects the parallel X-ray radiation at its end closest to the first mirror and emits X-ray radiation in a focused beam onto the specimen. The distance between the first and second mirrors is adjusted to suit the distance from the X-ray tube to the specimen. Focal spots on the specimen of diameter less than 15 microns (590.55 microinches) are possible, enabling precise analysis of small areas of the specimen.
    • 本发明涉及一种便携式设备,用于在远离设备的样本材料上进行X射线荧光光谱测定。 该装置包括诸如微焦点管的X射线产生管和两个抛物面X射线反射镜。 第一收集镜被定位成与管的出射窗口相邻的紧密耦合布置,使得它将平行的X射线辐射发射到第二聚焦镜,第二聚焦镜在第一反射镜(11)的轴线上并与之隔开 )。 第二反射镜(12)在最靠近第一反射镜的端部收集平行X射线辐射,并将聚焦光束中的X射线辐射发射到样品上。 调整第一和第二反射镜之间的距离以适应从X射线管到样本的距离。 直径小于15微米(590.55微英寸)的样品上的焦点是可能的,可以精确分析样品的小面积。
    • 3. 发明授权
    • Method and apparatus for prolonging the life of an X-ray target
    • 用于延长X射线靶的寿命的方法和装置
    • US06778633B1
    • 2004-08-17
    • US09937609
    • 2002-01-28
    • Neil LoxleyMark TaylorJohn Leonard WallGraham Vincent Fraser
    • Neil LoxleyMark TaylorJohn Leonard WallGraham Vincent Fraser
    • H05G152
    • H05G1/36H01J35/14H01J35/30
    • An X-ray generator comprises an evacuated and sealed X-ray tube, containing an electron gun and an X-ray target. An electron beam is produced by the electron gun in which the cathode is at negative high voltage, the electron gun consisting of a filament just inside the aperture of a Wehnelt grid which is biased negatively with respect to the filament. Two sets of beam deflection coils, are employed in two planes, mounted between the anode of the electron gun and the focussing lens to center the beam. Between the focussing lens and the target is an air-cored quadripole magnet which acts as a stigmator in that it turns the circular cross-section of the beam into an elongated one. This quadripole can be rotated about the tube axis so as to adjust the orientation of the line focus. The beam can be moved about on the target surface by controlling the currents in the four coils of the quadripole.
    • X射线发生器包括一个包含电子枪和X射线靶的真空密封的X射线管。 由电子枪产生电子束,其中阴极处于负高电压,电子枪由位于Wehnelt网格的孔内的细丝构成,其相对于灯丝负偏置。 两组光束偏转线圈用于安装在电子枪的阳极和聚焦透镜之间的两个平面中,以使光束居中。 在聚焦透镜和目标物之间的是一个空心四极磁铁,其作为一个标示器,因为它将光束的圆形横截面转变成一个细长的。 该四极杆可以围绕管轴线旋转,以便调节线焦点的取向。 通过控制四极线圈的四个线圈中的电流,光束可以在目标表面上移动。