Ion guiding device

Patent metadata

Field	Value
Publication number	US-10515790-B2
Application number	US-201615736107-A
Country	US
Kind code	B2
Filing date	Jun 20, 2016
Priority date	Jul 23, 2015
Publication date	Dec 24, 2019
Grant date	Dec 24, 2019

Abstract

The disclosure relates to an ion guiding device, including two sets of electrodes extending along a certain space axis, a first power supply device and a second power supply device. The electrodes are expandably arranged along a direction perpendicular to the space axis, at least one surface of each electrode in each set of electrodes is substantially on the same space plane, and the space planes for each set of electrodes are not same and not parallel, thereby forming an ion transmission channel having the cross sectional area gradually reduced in a direction perpendicular to the space axis; the first power supply device is used for applying radio-frequency voltages on at least a part of electrodes in the two sets of electrodes; and the second power supply device is used for applying voltage signals on at least a part of electrodes in the two sets of electrodes.

First claim

What is claimed is:

1. An ion guiding device, comprising:
two sets of electrodes extending along a space axis, a first power supply device and a second power supply device;
wherein the two sets of electrodes are expandably arranged along a first direction perpendicular to the space axis, at least one surface of each electrode in each set of electrodes is substantially on a same space plane, and said space planes for the two sets of electrodes are not same and not parallel and nonplanar, thereby forming an ion transmission channel having an ion inlet, an ion outlet, and a cross sectional area gradually reduced in a second direction perpendicular to the space axis and the first direction, and wherein the ion inlet of the ion transmission channel has a larger opening and the ion outlet thereof has a smaller opening;
wherein the first power supply device is used for applying radio-frequency voltages on at least a part of electrodes in only the two sets of electrodes to confine ions in the ion transmission channel in at least one direction perpendicular to the space axis; and
wherein the second power supply device is used for applying voltage signals on at least a part of electrodes in only the two sets of electrodes to form a voltage distribution in at least one direction perpendicular to the space axis to control ion movement, and form a voltage distribution in a direction of the space axis to realize ion transmission along the space axis.

2. The ion guiding device according to claim 1 , characterized in that: the space axis is a linear or curved axis.

3. The ion guiding device according to claim 2 , characterized in that: when the space axis is a curved axis, an axial direction at the ion inlet is a first axial direction, an axial direction at the ion outlet is a second axial direction, and an included angle between the first axial direction and the second axial direction is one of less than 10°, 10°-20°, 20°-30°, 30°-40°, 40°-50°, 50°-60°, 60°-70°, 70°-80°, 80°-90°, 90°-100°, 100°-110°, 110°-120°, 120°-130°, 130°-140°, 140°-150°, 150°-160°, 160°-170° and 170°-180°.

4. The ion guiding device according to claim 1 , characterized in that: electrodes in the two sets of plate electrodes are plate or nonplanar electrodes.

5. The ion guiding device according to claim 4 , characterized in that: the plate electrodes comprise one or a combination of square-pole electrodes, rectangular plate electrodes, fan-shaped plate electrodes, and thin-layer plate electrodes adhered on an insulating substrate.

6. The ion guiding device according to claim 5 , characterized in that: the insulating substrate is one of a printed circuit board, polyimide, ceramics and glass.

7. The ion guiding device according to claim 4 , characterized in that: the nonplanar electrodes are electrodes whose surfaces are partially or all nonplanar.

8. The ion guiding device according to claim 1 , characterized in that: an area ratio of the ion inlet to the ion outlet is one of 1-10, 10-100, 100-1,000 and more than 1,000.

9. The ion guiding device according to claim 1 , characterized in that: the first power supply device sequentially applies radio-frequency voltages with opposite polarity to all electrodes in each set of electrodes.

10. The ion guiding device according to claim 1 , characterized in that: voltage signals applied by the second power supply device are selected from one or a combination of DC voltages, square wave voltages, sawtooth wave voltages, triangle wave voltages and AC voltages.

11. The ion guiding device according to claim 10 , characterized in that: a duty cycle of the square wave voltages is in the range of one or more of 0-10%, 10% -20%, 20% -40%, 40% -60% and 60% -100%.

12. The ion guiding device according to claim 10 , characterized in that: the AC voltage signals have a frequency of 10 Hz -100 MHz.

13. The ion guiding device according to claim 1 , characterized in that: the expandable arrangement of the two sets of electrodes in a direction perpendicular to the space axis is parallel and/or non-parallel expanded arrangement.

14. The ion guiding device according to claim 1 , characterized in that: none of electrodes in the two sets of electrodes is segmented axially.

15. The ion guiding device according to claim 1 , characterized by further comprising auxiliary electrodes, wherein the auxiliary electrodes are placed at both sides of the ion guiding device, and the second power supply device applies voltage signals to the auxiliary electrodes to restrict ion movement in a direction perpendicular to the space axis and produce an axial voltage gradient in the ion channel to realize ion transmission.

16. The ion guiding device according to claim 15 , characterized in that: the auxiliary electrodes are parallel or not parallel to the space axis.

17. The ion guiding device according to claim 15 , characterized in that: the auxiliary electrodes are planar or nonplanar electrodes.

18. The ion guiding device according to claim 1 , characterized in that: the operating gas pressure of the ion guiding device is in the range of one or more of 2×10 5 Pa-2×10 3 Pa, 2×10 3 Pa-20 Pa, 20 Pa-2 Pa, 2 Pa-2×10 −1 Pa, 2×10 −1 Pa-2×10 −3 Pa and less than 2×10 −3 Pa.

19. The ion guiding device according to claim 1 , characterized in that: an optimal operating gas pressure of the ion guiding device is in the range of 0.1 Pa-100 Pa.

20. The ion guiding device according to claim 1 , characterized in that: the two sets of electrodes expand along a direction perpendicular to the space axis to form an array structure.

21. The ion guiding device according to claim 1 , characterized in that: the two sets of electrode systems expand along a closed curve to form a closed array structure.

22. The ion guiding device according to claim 1 , characterized by comprising a plurality of ion injection ports for injecting ions into the ion inlet.

23. The ion guiding device according to claim 22 , characterized in that: the ion injection direction is one or a combination of a direction of the space axis and a direction perpendicular to the space axis.

24. The ion guiding device according to claim 1 , characterized in that: the ion guiding device serves as one or a combination of a preceding-stage ion guiding device, an ion mobility analysis device, an ion compression device, an ion storage device, a collision chamber and an ion buncher device of a mass spectrometer or an ion mobility spectrometer.

Assignees

• Shimadzu Corp

Inventors

• Cheng Yupeng
• Zhang Xiaoqiang
• Sun Wenjian

Classifications

• H01J49/066 Primary

  Ion funnels · CPC title

• H01J49/40

  Time-of-flight spectrometers (H01J49/36 takes precedence) · CPC title

• H01J49/4205

  Device types · CPC title

• G01N27/622

  Ion mobility spectrometry · CPC title

• G01N27/623

  combined with mass spectrometry · CPC title