Multipole RF Drive Phase Control for Electron Capture Efficiency
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Solution Overview
Problem
Existing EAD devices employing RF ion traps face challenges in achieving precise control of RF fields without perturbing electron motion, which is crucial for maximizing efficiency and optimizing performance metrics.
Innovation Solution
A system comprising multiple RF generators, amplitude adjustors, and phase adjustors is used to apply RF voltages to a multipole ion processing device. This system allows for independent control of RF phases and amplitudes, ensuring a desired phase differential and amplitude balance to optimize performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If RF voltages are applied to multipole electrodes for ion confinement, then ion trapping efficiency is improved, but electron motion is perturbed which reduces electron capture efficiency
Solution Approach 1:
The patent divides the multipole electrode system into multiple independent RF voltage sources, each controlling a specific electrode or electrode pair. This segmentation allows independent optimization of RF parameters for ion confinement while minimizing perturbation to electron motion, resolving the contradiction between ion trapping efficiency and electron capture efficiency.
Solution Approach 2:
The patent implements dynamic control of RF voltage amplitudes and phases through independent adjustment of multiple RF sources. By dynamically optimizing the RF parameters in real-time, the system maintains effective ion confinement while minimizing disruptive effects on electron trajectories, thereby improving electron capture efficiency without sacrificing ion trapping performance.
2Productivity
If RF field strength is increased to improve ion confinement, then ion processing performance is improved, but RF field-induced distortion increases which affects electron energy control
Solution Approach 1:
The patent applies different RF voltage amplitudes and phases to different electrode segments, creating locally optimized RF field distributions. This allows strong RF fields in regions critical for ion confinement while maintaining weaker or more controlled fields in regions where electron energy precision is paramount, thus resolving the contradiction between ion processing performance and electron energy control.
Solution Approach 2:
The patent independently adjusts multiple RF parameters (amplitude, phase, frequency) across different voltage sources to optimize the overall system performance. By changing these parameters dynamically and independently, the system achieves strong ion confinement where needed while maintaining precise electron energy control in critical interaction regions, resolving the contradiction between these two performance metrics.
3Manufacturing precision
If multiple RF voltage sources are used for independent control, then RF field control precision is improved, but system complexity increases
Solution Approach 1:
The patent combines multiple RF voltage sources into a unified control architecture that manages the complexity through integrated signal generation and coordination. By merging the control functions and using synchronized signal distribution, the system achieves precise independent control of multiple electrodes while managing system complexity through unified management rather than completely separate control systems.
Solution Approach 2:
The patent designs the RF voltage generation system with universal control capabilities that can manage multiple electrodes through a common control framework. The RF sources are designed to be multi-functional, capable of operating in different configurations and modes, which reduces overall system complexity while maintaining precise control capabilities across all electrodes.
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
The system achieves improved control over RF fields, leading to enhanced electron capture efficiency, reduced RF field-induced distortion, and optimized performance metrics in EAD devices.
Implementation Method 1
efficient EAD device could be realized in various ion traps employing strong RF fields for ion confinement
Implementation Method 2
the amplitudes and/or the phases of the generating RF voltages can be controlled separately so as to optimize one or more performance metrics
Implementation Method 3
A system comprising multiple RF generators, amplitude adjustors, and phase adjustors is used to apply RF voltages to a multipole ion processing device
Implementation Method 4
the electron impingement on an ion results in the fragmentation of the ion
Data Source
AI summary
A system for applying RF voltages to a multipole ion processing device, configured for use in a mass spectrometer, includes a first RF generator configured to generate a first RF voltage and apply to a first pole electrode set, a second RF generator configured to generate a second RF voltage and apply to a second pole electrode set, a first amplitude adjustor configured to adjust an amplitude of the first RF voltage, a second amplitude adjustor configure to adjust an amplitude of the second RF voltage, and a phase adjustor in communication with the first RF generator and the second RF generator to adjust phase output of at least one of the first RF generator and the second RF generator so as to adjust a phase differential between the first RF voltage and the second RF voltage to be within a desired range.