Ion Trap Transformer Coupling for Crosstalk Reduction
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Solution Overview
Problem
Ion trap mass spectrometers face significant challenges with crosstalk currents, which overwhelm measurement signals and require complex software compensation, leading to unreliable ion determination.
Innovation Solution
A device with simple electronic components, including transformers and quartz filters, is used to couple radio-frequency storage signals in antiphase, reducing crosstalk currents and allowing for effective compensation and filtering of measurement signals, thereby isolating the ion information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If software compensation methods are used to compensate for crosstalk currents, then measurement accuracy can be improved, but device complexity and reliability deteriorate due to software errors and complex programming
Solution Approach 1:
The patent replaces the software-based compensation system with a hardware-based electrical compensation system. Transformers are connected to the end cap electrodes to generate compensation currents that are electronically subtracted from the measurement currents, eliminating the need for complex software processing and improving both reliability and simplicity while maintaining measurement accuracy.
Solution Approach 2:
The patent introduces transformers as intermediary components between the ion trap electrodes and the measurement system. These transformers serve as mediators that generate compensation currents proportional to the crosstalk currents, enabling electrical cancellation of the harmful crosstalk signals before they reach the measurement amplifier.
2Object-affected harmful factors
If software compensation is implemented, then crosstalk current effects can be reduced, but ease of operation and reliability worsen due to complex programming requirements and potential software errors
Solution Approach 1:
The patent replaces software-based crosstalk compensation with a hardware-based electrical compensation system using transformers. The transformers are directly connected to the end cap electrodes and automatically generate compensation currents that cancel the crosstalk effects, eliminating the need for complex software programming and improving ease of operation while maintaining reliability.
3Measurement precision
If measurement amplifiers are used to amplify weak measurement currents, then measurement sensitivity is improved, but reliability deteriorates because the amplifiers become overdriven by large crosstalk currents
Solution Approach 1:
The patent converts the harmful crosstalk currents into useful compensation currents through the transformers. The transformers sense the crosstalk currents and generate inverted versions that are subtracted from the measurement signals, thereby eliminating the harmful effect and allowing the measurement amplifier to operate within its linear range without being overdriven.
Solution Approach 2:
The patent applies preliminary anti-action by generating compensation currents that are opposite in phase to the crosstalk currents before they can overdrive the measurement amplifier. The transformers produce these anti-phase currents and combine them with the measurement signals, canceling the crosstalk effects in advance and protecting the amplifier from saturation.
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 simplifies the compensation of crosstalk currents, enhancing the accuracy of ion determination by reducing interference and allowing for clear measurement of ion masses without the need for complex software control.
Implementation Method 1
a first transformer, which is connected to the amplifier and the first electrode in such a way that the radio-frequency storage signal is coupled into the first electrode via the first transformer
Implementation Method 2
the first electrode is furthermore connected to a first quartz filter unit
Data Source
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AI summary
The invention relates to a device for mass selective determination of at least one ion or of a plurality of ions. The device according to the invention is used for example in a measuring apparatus having an ion trap (1404). The ion trap (1404) has a ring electrode (1401) having a first opening. A first electrode (1402) is arranged at the first opening. Furthermore, an amplifier (1408) for providing a radio-frequency storage signal for the ion trap (1404) and a first transformer (1411) are provided, said first transformer being connected to the amplifier (1408) and the first electrode (1402) in such a way that the radio-frequency storage signal is coupled into the first electrode (1402) via the first transformer (1411).