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Homogenization of the pulsed electric field created in a ring stack ion accelerator

An accelerator and pulse technology, applied in the field of mass spectrometry, which can solve problems such as the inapplicability of Ohm's law

Active Publication Date: 2016-09-28
DH TECH DEVMENT PTE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, switching on and off will happen very quickly and Ohm's law will not apply

Method used

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  • Homogenization of the pulsed electric field created in a ring stack ion accelerator
  • Homogenization of the pulsed electric field created in a ring stack ion accelerator
  • Homogenization of the pulsed electric field created in a ring stack ion accelerator

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Embodiment Construction

[0065] The present invention generally relates to a ring stack accelerator (RSA) for use in a mass spectrometer, which may be utilized in response to the application of a voltage pulse (e.g., a radio frequency (RF) voltage pulse) across the stack accelerator. A substantially homogeneous (uniform) electric field is generated within the volume of and at least along its longitudinal axis. The ring stack accelerator targets an electric field with two states (on and off). The on state is a non-zero electric field of the magnitude necessary to cause the ions to focus at the detector in space time velocity. The field-on state must have a period longer than the time it takes for the slowest, highest mass-to-charge ratio ions to leave the accelerator. This period is about 1 to 20 microseconds depending on the mass-to-charge ratio of the ion of interest. For this entire duration, the pulse must maintain the electric field constant. The field must not change while the ions are in the ...

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PUM

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Abstract

A ring stacked accelerator for use in a mass spectrometer includes a plurality of ring shaped plates arranged in a stack and is electrically coupled to a voltage divider that allows a substantially homogeneous electric field to be produced when the stack is energized. The voltage divider can include resistors and capacitors, where the capacitors are chosen to compensate for parasitic capacitances experienced by the plates. The ring stacked accelerator can be energized using an RF pulse. The ring stack accelerator can include one or more balancing capacitors for correcting effects that cause nonlinearity.

Description

[0001] Related applications [0002] This application claims U.S. Serial No. 61 / 922,973, filed January 2, 2014 and entitled "Homogenization of the Pulsed Electric Field Created in a Ring Stack Ion Accelerator" Provisional Application (which is hereby incorporated by reference in its entirety) and filed on December 19, 2014 and entitled "Homogenization of the Pulsed Electric Field Created in a Ring Stack Ion Accelerator" Stack Ion Accelerator), U.S. Provisional Application No. 62 / 094,283, which is incorporated herein by reference in its entirety. technical field [0003] The present invention relates generally to mass spectrometry and, more particularly, to methods and apparatus utilizing ring stack accelerators. Background technique [0004] In mass spectrometry, a solid, liquid, or gas sample contains atoms or molecules that are the object of study (usually quantification or identification). Atoms or molecules of interest are ionized and introduced into the mass spectrom...

Claims

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Application Information

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IPC IPC(8): H05H5/06
CPCH05H5/06H01J49/022H01J49/403H01J49/065H01J49/26
Inventor 罗伯特·E·霍伊夫勒威廉·M·劳埃德亚历山大·齐皮洛维奇
Owner DH TECH DEVMENT PTE