Ion Detector Photon Channeling for Dynamic Range
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Solution Overview
Problem
Conventional ion detection systems in mass spectrometry face limitations due to saturation issues, which restrict their dynamic range, making it difficult to simultaneously detect both low and high abundance ions effectively.
Innovation Solution
The implementation of a photon channeling assembly that separates the initial photon flux into a high and low photon flux, allowing for detection by separate photodetectors with different gains, thereby expanding the dynamic range to detect ions from 1 to 100,000.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the detector gain is increased to detect low abundance ions, then the signal-to-noise ratio for low abundance ions is improved, but the detector saturates when detecting high abundance ions
Solution Approach 1:
The patent divides the single detection channel into multiple parallel channels with different gains. The first channel has high gain for detecting low abundance ions, while the second channel has low gain for detecting high abundance ions. This segmentation allows simultaneous detection of ions across a wide dynamic range without saturation, resolving the contradiction between sensitivity for low abundance ions and reliability for high abundance ions.
2Reliability
If the detector gain is decreased to prevent saturation for high abundance ions, then the reliability for high abundance ion detection is improved, but the signal becomes non-measurable or poor SNR for low abundance ions
Solution Approach 1:
The patent applies local quality by assigning different gain characteristics to different detection channels. The first channel is optimized with high gain specifically for low abundance ions, while the second channel is optimized with low gain specifically for high abundance ions. This localized optimization allows each channel to perform its specific function effectively, resolving the contradiction between preventing saturation and maintaining sensitivity.
3Device complexity
If a single detector is used, then the device complexity is reduced, but the dynamic range is limited due to saturation at a single gain level
Solution Approach 1:
The patent creates a multi-functional detection system where multiple photodetectors operate in parallel, each serving a specific function within the overall detection system. The first photodetector handles low abundance ions while the second handles high abundance ions, and both contribute to the universal goal of wide dynamic range detection. This multi-functionality approach expands adaptability while maintaining reasonable device complexity.
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 solution enables the detection of a broad range of ions by separating the photon flux into distinct channels, preventing saturation and improving signal-to-noise ratio for both low and high abundance ions, thus enhancing the overall dynamic range of the ion detection system.
Implementation Method 1
an ion-to-electron converter for converting incident ions to secondary electrons
Implementation Method 2
an accelerating assembly including at least one of an electric field and a magnetic field for acceleration and transfer of the secondary electrons
Implementation Method 3
an accelerating assembly including at least one of an electric field and a magnetic field for acceleration and transfer of the secondary electrons
Implementation Method 4
the scintillator for converting the accelerated secondary electrons to an initial flux of photons
Implementation Method 5
at least one photodetector for detecting at least one of a first optical signal generated at the first photon channel, and a second optical signal generated at the second photon channel
Data Source
AI summary
An ion detection system for detecting incident ions including an ion-to-electron converter for converting incident ions to secondary electrons, an accelerating assembly including at least one of an electric field and a magnetic field for acceleration and transfer of the secondary electrons to a scintillator, the scintillator for converting the accelerated secondary electrons to an initial flux of photons, a photon channeling assembly including a first photon channel and a second photon channel, wherein the photon channeling assembly is configured for separating the initial flux of photons into at least a first photon flux channeled into the first photon channel and a second photon flux channeled into the second photon channel, and at least one photodetector for detecting at least one of a first optical signal generated at the first photon channel, and a second optical signal generated at the second photon channel.