公开(公告)号：US08637811B2

公开(公告)日：2014-01-28

申请号：US13184022

申请日：2011-07-15

Applicant: Urs Steiner ,  Roy P Moeller ,  David Deford

Inventor： Urs Steiner ,  Roy P Moeller ,  David Deford

IPC: B01D59/44

CPC classification number: H01J3/36 ,  H01J43/30 ,  H01J49/02 ,  H01J49/26

Abstract: Methods and systems to compensate for distortions created by dynamic voltage applied to an electron multiplier used in mass spectrometry. An electron multiplier has a cathode end accepting ion flow, an opposite emitter end and an interior surface. The electron multiplier produces an electron output from ions colliding with the interior surface. A variable power supply has a voltage output coupled to the cathode end and the emitter end of the electron multiplier. The voltage output changes dynamically to adjust the electron output from the electron multiplier. An anode is located in proximity to the electron multiplier. An electrometer is coupled to the anode in proximity to the electron multiplier to measure the current generated by the electron output. A low pass filter circuit is coupled to the emitter end to the ground of the electrometer to attenuate emitter voltage changes. A bias circuit is coupled to the emitter end to stabilize emitter to anode voltage difference.

Abstract translation: 用于补偿由施加到质谱仪中使用的电子倍增器的动态电压产生的失真的方法和系统。 电子倍增器具有阴极端接受离子流，相对的发射极端和内表面。 电子倍增器产生离子与内表面碰撞的电子输出。 可变电源具有耦合到电子倍增器的阴极端和发射极端的电压输出。 电压输出动态变化，以调整电子倍增器的电子输出。 阳极位于电子倍增器附近。 靠近电子倍增器的静电计耦合到阳极，以测量由电子输出产生的电流。 低通滤波器电路被耦合到发射极端到静电计的地面以衰减发射极电压变化。 偏置电路耦合到发射极端以稳定发射极与阳极的电压差。

公开(公告)号：US20130015767A1

公开(公告)日：2013-01-17

申请号：US13184022

申请日：2011-07-15

Applicant: Urs Steiner ,  Roy P. Moeller ,  David Deford

Inventor： Urs Steiner ,  Roy P. Moeller ,  David Deford

IPC: H01J43/30

CPC classification number: H01J3/36 ,  H01J43/30 ,  H01J49/02 ,  H01J49/26

Abstract: Methods and systems to compensate for distortions created by dynamic voltage applied to an electron multiplier used in mass spectrometry. An electron multiplier has a cathode end accepting ion flow, an opposite emitter end and an interior surface. The electron multiplier produces an electron output from ions colliding with the interior surface. A variable power supply has a voltage output coupled to the cathode end and the emitter end of the electron multiplier. The voltage output changes dynamically to adjust the electron output from the electron multiplier. An anode is located in proximity to the electron multiplier. An electrometer is coupled to the anode in proximity to the electron multiplier to measure the current generated by the electron output. A low pass filter circuit is coupled to the emitter end to the ground of the electrometer to attenuate emitter voltage changes. A bias circuit is coupled to the emitter end to stabilize emitter to anode voltage difference.

Abstract translation: 用于补偿由施加到质谱仪中使用的电子倍增器的动态电压产生的失真的方法和系统。 电子倍增器具有阴极端接受离子流，相对的发射极端和内表面。 电子倍增器产生离子与内表面碰撞的电子输出。 可变电源具有耦合到电子倍增器的阴极端和发射极端的电压输出。 电压输出动态变化，以调整电子倍增器的电子输出。 阳极位于电子倍增器附近。 靠近电子倍增器的静电计耦合到阳极，以测量由电子输出产生的电流。 低通滤波器电路被耦合到发射极端到静电计的地面以衰减发射极电压变化。 偏置电路耦合到发射极端以稳定发射极与阳极的电压差。