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    • 134. 发明授权
    • Compact pyroelectric sealed electron beam
    • 紧凑型热电密封电子束
    • US08440981B2
    • 2013-05-14
    • US13159304
    • 2011-06-13
    • Leslie BrombergChing Wu
    • Leslie BrombergChing Wu
    • H01J37/06H01J29/08
    • H01J49/147
    • A non-radioactive source for Atmospheric Pressure Ionization is described. The electron-beam sealed tube uses a pyroelectric crystal(s). One end of the crystal is grounded while the other end has a metallic cap with sharp feature to generate an electron beam of a given energy. The rate of heating and/or cooling of the crystal is used to control the current generated from a tube. A heating and/or cooling element such as a Peltier element is useful for controlling the rate of cooling of the crystal. A thin window that is transparent to electrons but impervious to gases is needed in order to prolong the life of the tube and allow the extraction of the electrons. If needed, multiple crystals with independent heaters can be used to provide continuous operation of the device. Dielectric shielding of the pyroelectric crystal is used to minimize discharge of the crystal.
    • 描述了用于大气压电离的非放射源。 电子束密封管使用热电晶体。 晶体的一端接地,而另一端具有尖锐特征的金属盖,以产生给定能量的电子束。 使用晶体的加热和/或冷却速度来控制从管产生的电流。 诸如珀尔帖元件的加热和/或冷却元件可用于控制晶体的冷却速率。 需要对电子透明但不透气体的薄窗,以延长管的寿命并允许电子的提取。 如果需要,可以使用具有独立加热器的多个晶体来提供设备的连续操作。 热电晶体的介电​​屏蔽用于使晶体的放电最小化。