Mesh Plate Ion Extraction Pulser Reduces Capacitance
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Solution Overview
Problem
Existing ion extraction and redirection devices in mass spectrometry systems face high capacitance issues, requiring increased electrical power and complex circuits, which affects resolving power and increases operational costs.
Innovation Solution
The use of a mesh plate for applying a pulse and electric field to extract and redirect ions, combined with filter and guard plates for further filtering and directing, significantly reduces capacitance and power requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If traditional electrodes are used for ion extraction and redirection, then ion beam control is achieved, but high capacitance requires increased electrical power and complex circuits
Solution Approach 1:
The patent uses a mesh plate instead of a traditional solid electrode. The mesh structure has porous/open characteristics that reduce the effective capacitance while still providing the necessary electric field for ion extraction and redirection. This directly addresses the high capacitance problem by replacing a solid conductive surface with a porous mesh structure.
Solution Approach 2:
The ion extraction system is divided into multiple discrete mesh plates rather than using a single large electrode. This segmentation reduces the overall capacitance by distributing the electric field across multiple smaller elements, thereby reducing the total power requirement and simplifying the circuit design.
2Power
If high voltage power supplies are used to overcome high capacitance, then ion extraction is maintained, but resolving power of the mass spectrometry system deteriorates
Solution Approach 1:
The mesh plate structure reduces capacitance to such an extent that high voltage power supplies are no longer needed. The reduced capacitance allows the use of lower voltage, which in turn improves the resolving power of the mass spectrometry system by reducing voltage-related disturbances and improving measurement precision.
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 achieves a 94% reduction in capacitance and power consumption, enabling efficient ion extraction and detection while maintaining high resolving power in mass spectrometry systems.
Implementation Method 1
a mesh plate for applying a pulse and electric field for extracting and re-directing ions from an ion beam
Implementation Method 2
a first filter plate adjacent to the mesh plate for filtering ions extracted by the mesh plate
Data Source
AI summary
The invention provides an ion extraction pulser. The ion extraction pulser may be used independently or in conjunction with a mass spectrometry system. The mass spectrometry system includes an ion source for producing ions, an ion optics system downstream from the ion source for selecting and directing ions, and a detector down stream from the ion optics system for detecting the ions selected and directed by the ion optics system. The ion optics system includes one or more ion extraction pulsers. The ion extraction pulser includes a mesh plate for applying a pulse for extracting ions from an ion beam; a first filter plate adjacent to the mesh plate for filtering ions extracted by the mesh plate; a guard plate adjacent to the first filter plate for further directing ions filtered by the first filter plate; and a second filter plate adjacent to the first guard plate for further filtering ions directed from the guard plateThe invention also provides methods for extracting, selecting and processing ions using ion extraction pulsers.