Optimizing field type four pole rod

Abstract

Tetrapolar pole for optimizing shape of field can be in use as pole type analyzer for mass of ion, ion trap type analyzer for mass of ion, linear ion trap, or ion guidance. The tetrapolar pole includes at least four RF electrodes parallel to z-axis of central axis of mass analyzer, and RF voltage of generating RF ion capture electric field. Here, RF electrodes are in structure of cylinder body. The cylindrical surface is locus drawn out by generating line L of electrode parallel to z-axis, and moving along the gauge line of electrode f(x,y)=0. The locus possesses form of piecewise function. Using a set of parallel plane through each boundary point, the invention parses x or y electrode into at least two thin layer. It is easy to be produced for the electrode possible to be parsed to multiple units of thin layer. Adjusting parameters of the thin layers can obtain optimized shape of tetrapolar field so as to improve analytical performance of tetrapolar mass analyzer.

Description

technical field [0001] The invention relates to the technical field of mass spectrometry, in particular to a quadrupole that can be used as a rod-shaped ion mass analyzer, an ion trap ion mass analyzer, a linear ion trap or an ion guide, in particular to a quadrupole with optimized Field-shaped and easy-to-fabricate quadrupoles. Background technique [0002] Mass spectrometers often involve multipoles in ion optics. Typically, quadrupoles are used as rod ion mass analyzers, ion trap ion mass analyzers, linear ion traps, or ion guides. [0003] The quadrupole mass analyzer is a device that uses ions to be in a stable state in sequence according to the mass-to-charge ratio m / z in the radio frequency electric field and can stably pass through the quadrupole mass analysis area to reach the ion detector to achieve mass spectrometry. [0004] The quadrupole ion trap is a special device that can be used as an ion storage device to confine gaseous ions in the quadrupole field area...

AI Technical Summary

Problems solved by technology

The existing quadrupoles in the field of mass spectrometers either require high-precision machining or contain significant high-order fields. These factors will limit the development of small portable quadrupole mass analyzers

At the same time, the problem of introducing higher-order fields will be involved in the research on the optimization field shape of quadrupole mass analyzers. The existing patent achievements only involve the introduction of octupole fields, and do not provide feasible solutions for other higher-order fields.

Images