Dual RF Field Hyperbolic Ion Guide for Mass Range Transmission
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Solution Overview
Problem
Current ion guide designs in mass spectrometry systems face limitations in ion transmission over wider mass ranges and larger pressure reductions, while also being costly, and there is a need for improved ion beam focusing and reduced emittance.
Innovation Solution
The ion guide incorporates a combination of first and second RF fields of specific orders, with the second RF field superimposed on the first, and a hyperbolic electrode configuration to enhance ion confinement and transmission, allowing for broader mass range coverage and reduced beam emittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional ion guide designs are used, then the system structure is simple, but ion transmission over wider mass ranges and larger pressure reductions is limited
Solution Approach 1:
The patent combines two RF fields of different orders (first RF field of Nth order and second RF field of 2Nth order) within a single ion guide structure. This merging of multiple field types enables the ion guide to handle wider mass ranges and larger pressure reductions while maintaining a unified device structure, thus improving adaptability without proportionally increasing device complexity.
Solution Approach 2:
The ion guide is designed to perform multiple functions simultaneously: transporting ions through pressure-reducing stages, reducing beam emittance, and accommodating wide mass ranges. The dual RF field configuration enables a single device to fulfill these diverse requirements, enhancing versatility while avoiding the need for multiple separate components.
2Productivity
If conventional ion guide designs are used, then the device cost is lower, but ion transmission performance and beam focusing are insufficient
Solution Approach 1:
By merging the first and second RF fields into a single ion guide operation, the system achieves superior ion transmission efficiency and beam focusing capabilities. The combined fields work synergistically to improve productivity metrics while the integration into one device keeps the complexity increase manageable.
3Ease of operation
If conventional ion guide designs are used, then the voltage and power requirements are higher, but ion transmission and beam focusing are weaker
Solution Approach 1:
The combination of first and second RF fields creates a more efficient ion confinement and transmission mechanism. This merged field approach improves ion transmission quality and beam focusing while reducing the individual voltage and power requirements compared to conventional single-field designs, making the system easier to operate.
4Adaptability or versatility
If conventional ion guide designs are used, then the system cost is reduced, but ion transmission over full mass range is limited
Solution Approach 1:
The ion guide with dual RF fields is designed as a universal device capable of transmitting ions across the full mass range. The hyperbolic electrode configuration and dual-field approach enable this broad adaptability while integrating multiple functions into a single device, thereby improving versatility without requiring multiple separate components.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration improves ion transmission and beam focusing, enabling the full mass range to be transmitted with lower voltages and power, reducing system costs and enhancing mass spectrometry performance.
Implementation Method 1
a first RF field generator configured for generating a first RF field of Nth order where N is an integer equal to or greater than 2
Implementation Method 2
a second RF field generator configured for generating a second RF field of 2Nth order superimposed on the first RF field and penetrating between the first electrodes
Implementation Method 3
a plurality of electrodes extending from the entrance end to the exit end and circumferentially spaced about the guide axis, the plurality of electrodes comprising a hyperbolic configuration such that the electrodes inscribe a guide volume from the entrance end to the exit end having a hyperbolic radial boundary swept about the guide axis
Data Source
AI summary
An ion guide generates a first RF field of Nth order where N is an integer equal to or greater than 2, and a second RF field of 2Nth order superimposed on the first RF field. The first and second RF fields may be generated by respective first and second sets of electrodes. Another ion guide may include a converging entrance section followed by an exit section. The converging section may have a hyperbolic profile. A hyperbolic profile may be presented by electrodes having a twisted configuration relative to an ion guide axis.