Ion Analyzer Electrode Circuit for Synchronized Polarity Switching
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Solution Overview
Problem
In mass spectrometers, particularly in ESI sources, the switching of polarity for voltages applied to electrodes can lead to a mismatch in timing, resulting in the formation of undesired electric fields and a deterioration in ion intake efficiency.
Innovation Solution
The implementation of a power feeding circuit with a series connection of a power supply connection part, electrode connection parts, resistance elements, and a grounding part, allowing a single power supply to output voltages with predetermined magnitudes to both the push and convergence electrodes, ensuring synchronized polarity switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If separate power supplies are used for the push electrode and convergence electrode, then each electrode can be independently controlled, but the polarity switching timing becomes mismatched causing undesired electric fields
Solution Approach 1:
The patent combines two separate power supplies into a single power supply that simultaneously controls both the push electrode and convergence electrode. This merging ensures that polarity switching occurs at the same time for both electrodes, eliminating the timing mismatch that causes undesired electric fields, while still allowing independent voltage magnitude control through separate connection paths.
2Reliability
If a single power supply is used for both electrodes, then polarity switching is synchronized, but independent control of voltage magnitudes is limited
Solution Approach 1:
The patent segments the single power supply output into two independent control paths by connecting the push electrode and convergence electrode through separate connection parts (first electrode connection part and second electrode connection part) to different terminals of the power supply. This allows independent adjustment of voltage magnitudes for each electrode while maintaining synchronized polarity switching from the single power supply.
3Adaptability or versatility
If polarity switching is performed in ESI source for measuring both positive and negative ions, then measurement versatility is improved, but timing mismatch causes deterioration in ion intake efficiency
Solution Approach 1:
The patent merges the power supply control for push electrode and convergence electrode into a single synchronized system, ensuring that when polarity switching occurs for measuring both positive and negative ions, both electrodes switch simultaneously. This eliminates timing mismatch that would create undesired electric fields and maintain high ion intake efficiency throughout the polarity switching process.
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 ensures that the polarity switching of voltages applied to both electrodes is synchronized, thereby suppressing the generation of undesired electric fields and maintaining high ion intake efficiency.
Implementation Method 1
a power feeding circuit in which a power supply connection part, a first electrode connection part, a first resistance element, a second electrode connection part, a second resistance element, and a grounding part are provided in series
Implementation Method 2
a power supply connected to the power supply connection part and configured to output both a DC positive voltage and a DC negative voltage
Implementation Method 3
The ions contained in the jet emitted from the ESI nozzle are pushed toward the convergence electrode by a potential gradient from the push electrode toward the convergence electrode, and are converged to the ion intake port by a potential gradient from the convergence electrode toward the ion intake port
Data Source
AI summary
An ion analyzer 2 including: a power feeding circuit 26 in which a power supply connection part 261, a first electrode connection part 262, a first resistance element 263, a second electrode connection part 264, a second resistance element 265, and a grounding part are provided in series; a power supply P connected to the power supply connection part 261 and configured to output both a DC positive voltage and a DC negative voltage; a first voltage supply electrode 23 connected to the first electrode connection part 262; and a second voltage supply electrode 24 connected to the second electrode connection part 264. In particular, it can be suitably used as a device for applying a voltage to a push electrode 23 and a convergence electrode 24 disposed in an ionization chamber 20 of a mass spectrometer including an ESI source 21.