Ion guiding device and guiding method

Patent metadata

Field	Value
Publication number	US-11031224-B2
Application number	US-201716500467-A
Country	US
Kind code	B2
Filing date	May 30, 2017
Priority date	Apr 28, 2017
Publication date	Jun 8, 2021
Grant date	Jun 8, 2021

Abstract

An ion guiding device includes ring electrodes with a same size disposed in parallel; wherein a connection line of centers of the ring electrodes is defined as an axis, a normal of a plane where any of the ring electrodes is located and a tangent line of the axis at a center of the ring electrode form an included angle being a range of (0, 90) degrees; a radio-frequency voltage source, for applying an out-phase radio-frequency voltage on a neighboring ring electrode along the axis, so that ions are confined inside the ring electrode during a transmission process; and a direct-current voltage source, applying a direct-current voltage with an amplitude changing along the axis on the ring electrode, so that the ions are transmitted along the axis and focused to a position closer to an inner surface of the ring electrode along a direction of the normal.

First claim

The invention claimed is:

1. An ion guiding device, characterized by comprising:
a plurality of ring electrodes with a same size disposed in parallel, wherein a connection line of centers of the plurality of ring electrodes is defined as an axis, a normal of a plane where any of the ring electrodes is located and a tangent line of the axis at a center of the ring electrode form a first included angle, and a range of the first included angle is greater than 0 and less than 90 degrees;
a radio-frequency voltage source, for applying an out-phase radio-frequency voltage on a neighboring ring electrode along the axis, so that ions are confined inside the ring electrode during a transmission process; and
a direct-current voltage source, for applying a direct-current voltage with an amplitude changing along the axis on the ring electrode, so that the ions are transmitted along the axis and focused off-axis to an inner surface of the ring electrode and an ions transmission direction and the axis form a second included angle, and a range of the second included angle is greater than 0 and less than 90 degrees.

2. The ion guiding device according to claim 1 , characterized in that, the ring electrode is circular, oval or polygonal.

3. The ion guiding device according to claim 1 , characterized in that, the axis is a straight line, curve or polygonal line.

4. The ion guiding device according to claim 1 , characterized in that, the amplitude of the direct-current voltage is changed in a nonlinear manner along the axis.

5. The ion guiding device according to claim 1 , characterized by further comprising: an ion injection device for injection ions to the ion guiding device, wherein an included angle between an ion injection direction and the direction of the normal ranges from 0 to 90 degrees.

6. The ion guiding device according to claim 1 , characterized by further comprising: an ion ejection device for ejection focused ions from the ion guiding device, wherein an included angle between an ion exiting direction and the direction of the normal ranges from 0 to 90 degrees.

7. The ion guiding device according to claim 1 , characterized by further comprising: an air pump device, for pumping neutral components around the plurality of ring electrodes.

8. The ion guiding device according to claim 1 , characterized by further comprising: several ring electrodes disposed at upstream of the plurality of ring electrodes, wherein the several ring electrodes are disposed in parallel to the plurality of ring electrodes, and an included angle between a normal of a plane where the several ring electrodes are located and a tangent line of the axis at a center of the ring electrodes is 0 degree.

9. An ion guiding method, characterized by comprising the following steps:
disposing a plurality of ring electrodes with a same size in parallel; defining a connection line of centers of the plurality of ring electrodes as an axis, and a first included angle being formed between a normal of a plane where any of the ring electrodes is located and a tangent line of the axis at a center of the ring electrode, wherein a range of the first included angle is greater than 0 and less than 90 degrees;
applying an out-phase radio-frequency voltage on a neighboring ring electrode along the axis, so that ions are confined inside the ring electrode during a transmission process; and
applying a direct-current voltage with an amplitude changing along the axis on the ring electrode, so that the ions are transmitted along the axis and focused off-axis to an inner surface of the ring electrode and an ions transmission direction and the axis form a second included angle, and a range of the second included angle is greater than 0 and less than 90 degrees.

10. The ion guiding method according to claim 9 , characterized by further comprising: injection the ions to the ion guiding device, wherein an included angle between an ion injection direction and the direction of the normal ranges from 0 to 90 degrees.

11. The ion guiding method according to claim 9 , characterized by further comprising: ejection the focused ions from the ion guiding device, wherein an included angle between an ion ejection direction and the direction of the normal ranges from 0 to 90 degrees.

12. The ion guiding method according to claim 9 , characterized by further comprising: disposing several ring electrodes at upstream of the plurality of ring electrodes, wherein the several ring electrodes are disposed in parallel to the plurality of ring electrodes, and an included angle between a normal of a plane where the several ring electrodes are located and a tangent line of the axis at a center of the ring electrodes is 0 degree.

Assignees

• Shimadzu Corp

Inventors

• Wang Keke
• Zhang Xiaoqiang
• Sun Wenjian

Classifications

• H01J49/068

  Mounting, supporting, spacing, or insulating electrodes · CPC title

• H01J3/14

  Arrangements for focusing or reflecting ray or beam (H01J3/02, H01J3/04 take precedence) · CPC title

• H01J49/061 Primary

  Ion deflecting means, e.g. ion gates · CPC title

• H01J49/066 Primary

  Ion funnels · CPC title

• H01J49/065

  having stacked electrodes, e.g. ring stack, plate stack · CPC title