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Time-of-flight mass spectrometer electronics reading method based on pulse front edge time measurement and amplitude correction algorithm

A technology of time-of-flight mass spectrometry and time measurement, which is applied in the field of electronic readout, can solve problems such as limiting the application field of time-of-flight mass spectrometers, and achieve the effects of ensuring real-time analysis and processing performance, reducing costs, and simplifying circuit design

Inactive Publication Date: 2012-11-21
ANHUI USTC JIANCHENG HAISHENG TECH
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Problems solved by technology

[0006] The readout electronics of the existing time-of-flight mass spectrometers are basically based on the above two methods. Although the functions can be realized to a certain extent, there are disadvantages that cannot be ignored, which limit the application fields of time-of-flight mass spectrometers, and their Independent industrialization

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  • Time-of-flight mass spectrometer electronics reading method based on pulse front edge time measurement and amplitude correction algorithm

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Embodiment Construction

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

[0029] Such as figure 1 Shown is a schematic diagram of the system structure of the present invention, including the following parts in the shown system: MCP is a detector signal; Buffer is an analog buffer module; Shaper is a shaping circuit module; ADC is an analog-to-digital converter module; TDC time Digitizer module;

[0030] The first object of the present invention is to propose a new scheme combining pulse front time measurement with p...

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Abstract

The invention discloses a time-of-flight mass spectrometer electronics reading method which can improve time resolution and a quantitative performance of a time-of-flight mass spectrometer at the same time and is different from an electronics reading scheme of a traditional time-of-flight mass spectrometer by an ADC (Analog to Digital Converter) waveform sampling or a TDC (Time to Digital Converter) pulse time measuring. The pulse front edge time measurement and a pulse forming sampling scheme are combined; the front edge time measured by the TDC is corrected by amplitude information obtained by a middle and low speed ADC for sampling a formed pulse, so that a time resolution effect is obviously improved, and the quantitative performance of an apparatus is improved. According to the reading method, an expensive high-speed ADC (over 1G SPS (samples per second) ) chip is replaced by a pulse forming circuit and the middle and low-speed ADC (about 100M of SPS); a constant fraction discriminator (CFD) circuit in a traditional time-of-flight mass spectrometer reading electronics is replaced by utilizing direct pulse front edge screening, and apparatus cost is reduced when a performance is improved.

Description

technical field [0001] The invention belongs to the field of time-of-flight mass spectrometers, in particular to an electronic readout that combines pulse front time measurement and amplitude-time correction algorithm, can simultaneously improve the time resolution and quantitative performance of time-of-flight mass spectrometers, and can save costs method. Background technique [0002] As a high-end analytical instrument, time-of-flight mass spectrometer has a wide range of applications in environmental monitoring, food safety, biology, pharmaceuticals and other fields. One of the most important indicators for evaluating the performance of a time-of-flight mass spectrometer is its resolution, which is not only related to physical design and machining, but also directly depends on the time measurement accuracy of the instrument's readout electronics. [0003] Typically, the readout electronics of a time-of-flight mass spectrometer tends to employ one of two options: [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J49/00H01J49/02
Inventor 宗诚刚
Owner ANHUI USTC JIANCHENG HAISHENG TECH
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