Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Linear ion trap analyzer

A technology for ion traps and analyzers, applied to mass spectrometers, etc., which can solve problems such as increased instrument costs, field adjustment electrode settings, and voltage application difficulties

Active Publication Date: 2015-03-11
SHIMADZU SEISAKUSHO CO LTD
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since there is no position where the AC potential is zero like in the end cap of the 3D ion trap, this makes it difficult to set up the field adjustment electrodes and apply the voltage
[0010] In addition, since ions in the linear ion trap may emerge from the extraction grooves of the two X electrodes after resonance excitation, it is structurally necessary to install ion detectors behind the two X electrodes to receive ion signals to the greatest extent, which increases the cost of the instrument

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Linear ion trap analyzer
  • Linear ion trap analyzer
  • Linear ion trap analyzer

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0037] still refer to figure 1 An embodiment of the present invention will be described. The two-dimensional linear ion trap is structurally divided into a front section 4, a middle section 5 and a rear section 6. The front and rear sections 4 and 6 are applied with relatively high potentials to produce axial confinement of ions (for positive ions, for negative ions, it is relatively high. Low potential, the same below). Each segment has two pairs of main electrodes 1, 2 in the X and Y directions, on which driving high-frequency voltages of opposite phases are applied to form a radial trapping electric field. In an alternative embodiment, the front section 4 and the rear section 6 can also be replaced by front and rear end cap electrodes to generate a DC or AC trapping electric field in the axial direction. Ions are usually introduced from one end along the Z axis and are trapped in a linear region between two pairs of electrodes on the X and Y axes. If a dipole excitation ...

no. 2 example

[0044] As mentioned above, planar electrodes, as a special case of cylindrical electrodes, can also be used to form linear ion traps. image 3 A schematic diagram of a rectangular linear ion trap constructed with four planar electrodes according to the second embodiment of the present invention is given. For clarity and brevity, image 3 Only the middle section is shown, and the front and rear sections or front and rear end caps are omitted. refer to image 3 As shown, two pairs of main electrodes 11 and 12 in the X and Y directions respectively apply driving high-frequency voltages of opposite phases to each other to form a radial trapping electric field. In the middle of the X electrode 11a opposite to the extraction groove 13, a field adjustment electrode 15 is provided. Similar to the first embodiment, the voltage on the field adjustment electrode is set to be the high frequency voltage V on the adjacent X electrode 11a 1a at least a portion of and a DC voltage V DC s...

no. 3 example

[0049] In this embodiment, in order to obtain a better quadrupole field shape for the rectangular linear ion trap built with planar electrodes, each electrode plane can be formed by several sub-electrodes, and each sub-electrode is added with a certain proportion of high-frequency voltage, forming a field shape similar to the electric field generated by the hyperbolic cylinder. The specific details of this type of ion trap can be found in Chinese patent CN1585081.

[0050] Figure 4 A planar printed circuit (PCB) type linear ion trap cross-sectional structure according to the present embodiment is shown. In the present embodiment, a flat strip-shaped printed circuit 26 is provided on at least a part of the electrode plate, and a field adjustment electrode 25 is provided in the middle of the X electrode plate 21 opposite to the lead-out groove 23 . Therein, the field adjusting electrode 25 of the trapezoidal cross-section can be retracted inside the adjacent X electrode plate...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a linear ion trap analyzer. The linear ion trap analyzer comprises an ion trapping space surrounded by a plurality of cylinder electrodes, wherein high frequency voltage is applied to at least one part of cylinder electrodes so as to generate a radial trapping electric field which mainly has two dimensional quadrupole fields in the trapping space; at least one ion leading-out slot is formed on an ion trap in the direction perpendicular to a center axis, and an alternating electric field for exciting dipoles is overlapped in the direction; a strip-type field regulating electrode is arranged in a slit in the cylinder electrode right opposite to the ion leading-out slot, or in the gap between two cylinder electrodes; and the voltage on the field regulating electrode is set as the sum of all or one part of the high frequency voltage on the adjacent cylinder electrode and direct current (DC) voltage, and the DC voltage can be regulated as required. By setting the field regulating electrode and regulating the DC voltage, one or more aims of optimizing a field form in a linear ion trap and influencing ion motion characteristics during resonance excitation can be fulfilled.

Description

technical field [0001] The present invention relates to the technology of mass spectrometry analysis of ions by using ion trap, in particular to a linear ion trap analyzer with optimized electric field. Background technique [0002] The traditional quadrupole field ion trap technology has been greatly developed since the 1950s and is widely used in mass spectrometry instruments. Much of the literature and patents in this regard are included in the book "Practical Aspects of Ion Trap Mass Spectrometry" by R.E. March and J.F.J. Todd. The three-dimensional rotating ion trap consists of a ring electrode and a pair of end cap electrodes, which form an analysis space. A radio frequency voltage is applied to the ring electrode to generate trapped ions in a quadrupole field, and a dipole alternating voltage is applied between the two end caps. The ions are excited and ions are selectively ejected to achieve the purpose of mass scanning. [0003] Since its commercialization, the tw...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H01J49/26
Inventor 丁力吝涛蒋公羽穆辉
Owner SHIMADZU SEISAKUSHO CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com