Ion Focusing Device Using Segmented Electrodes
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Solution Overview
Problem
Existing ion manipulation technologies face challenges in efficiently directing and transferring ions with minimal losses, particularly in the context of mass spectrometry applications.
Innovation Solution
The use of electrode arrangements spaced apart at oblique angles forming a tapered ion transfer channel, combined with RF and traveling wave electrodes, to create an electric field that directs ions from an input end to an output end, where the electric field is matched to an ion guide, minimizing ion losses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If conventional ion manipulation technologies are used, then ion transfer can be achieved, but ion losses are high and alignment precision is difficult to maintain
Solution Approach 1:
The electrode system is divided into multiple electrode arrangements spaced apart from each other, with each arrangement containing multiple electrodes that can be independently controlled. This segmentation allows for localized electric field optimization, reducing ion losses by providing continuous ion confinement and guidance through the transfer channel while maintaining precise alignment without requiring perfect mechanical tolerances across the entire system.
Solution Approach 2:
The patent introduces a spatial dimension by arranging electrodes at oblique angles relative to the ion propagation axis, creating a three-dimensional electric field configuration. This dimensional approach allows ions to be confined and guided through a tapered channel geometry, reducing ion losses by providing radial confinement while the tapering provides longitudinal guidance, thereby decoupling alignment precision requirements from mechanical manufacturing tolerances.
2Productivity
If a tapered ion transfer channel is implemented, then ion transfer efficiency improves, but device complexity increases
Solution Approach 1:
The complex tapered ion transfer channel is achieved through segmentation of the electrode system into multiple discrete electrode arrangements. Each arrangement contributes to the overall tapering geometry, and the segmented structure allows for modular fabrication and assembly, reducing the practical complexity despite the sophisticated three-dimensional electric field configuration required for high ion transfer efficiency.
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 approach enables efficient ion transfer with reduced losses, alleviating engineering constraints and potentially lowering the cost of ion manipulation platforms by improving alignment precision and reducing ion losses to less than 5%.
Implementation Method 1
directing and transferring ions have remained... the received ions are coupled at the output end to the input end of the ion guide with an electric field... directing the ions in the ion transfer channel to the output end with an electric field provided by the plurality of electrode arrangements
Implementation Method 2
at least one of the electrode arrangements includes a plurality of RF electrodes... situated to direct the ions away from the at least one electrode arrangement... plurality of traveling wave electrode sets... situated to direct the ions towards the output end of the ion transfer channel
Data Source
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Figure 1C
AI summary
The claimed invention relates to an ion focusing device comprising: a first surface extending along a first axis and a second surface extending along a second axis and defining a space therebetween dimensioned to receive ions. The first surface includes an electrode arrangement comprising a first plurality of inner electrodes. The first plurality of inner electrodes includes: a first plurality of electrodes extending along the first axis, the first plurality of electrodes comprising a first electrode configured to receive a first radiofrequency (RF) voltage and a second electrode configured to receive a second RF voltage, the second electrode being adjacent to the first electrode. A second plurality of segmented electrodes is arranged along the first axis between or adjacent to the first plurality of electrodes, the second plurality of segmented electrodes being configured to receive a first plurality of voltages and generate a first traveling wave configured to travel along the first axis.