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    • 73. 发明申请
    • COMPACT PYROELECTRIC SEALED ELECTRON BEAM
    • 紧凑型电子密封电子束
    • US20110260075A1
    • 2011-10-27
    • US13159304
    • 2011-06-13
    • Leslie BrombergChing Wu
    • Leslie BrombergChing Wu
    • H01J27/02
    • 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。
    • 77. 发明授权
    • Methods and apparatus of ion mobility spectrometer
    • 离子迁移谱仪的方法和装置
    • US07696474B2
    • 2010-04-13
    • US12026192
    • 2008-02-05
    • Ching WuLeslie Bromberg
    • Ching WuLeslie Bromberg
    • H01J49/42H01J49/26H01J49/10
    • G01N27/624
    • The present invention describes apparatuses and methods that provide energy to ions in a non-thermal manner. The elevated ion energy minimizes or eliminates interferences due to clustering with polar molecules, such as water. The energized ions are separated in an ion mobility spectrometer. During the ion transportation and separation process, the elevated energy level of ions prevents them from clustering with neutral molecule inside the spectrometer. The additional electric field component only causes ions to reach elevated energy level, whereby the spectrometer can preserve its normal performance, meanwhile avoiding interference from water and other neutral molecules. A RF electric field is applied to the ions in ionization, reaction and separation region of ion mobility spectrometers.
    • 本发明描述了以非热方式向离子提供能量的装置和方法。 升高的离子能量最小化或消除由于与极性分子(例如水)聚集而产生的干扰。 激发离子在离子迁移谱仪中分离。 在离子运输和分离过程中,提高的离子能级防止它们与分光计内部的中性分子聚集。 额外的电场分量仅使离子达到提高的能量水平,由此光谱仪可以保持其正常性能,同时避免水和其他中性分子的干扰。 离子迁移谱仪的电离,反应和分离区域中的离子被施加RF电场。
    • 79. 发明申请
    • COMPACT PYROELECTRIC SEALED ELECTRON BEAM
    • 紧凑型电子密封电子束
    • US20100065754A1
    • 2010-03-18
    • US12251995
    • 2008-10-15
    • Leslie BrombergChing Wu
    • Leslie BrombergChing Wu
    • H01J27/02
    • 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. The energy of the electrons can be determined through the appropriate choice of the radius of curvature of the sharp feature and the gap between the sharp feature and the window, while the opposite side of the crystal is at low voltage. The size of the gap and the radius of curvature of the sharp feature are determined by the filling gas nature and pressure.
    • 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。 电子的能量可以通过适当选择尖锐特征的曲率半径和尖锐特征与窗口之间的间隙来确定,而晶体的相对侧处于低电压。 尖锐特征的间隙尺寸和曲率半径由填充气体的性质和压力决定。