Pulse generation circuit, pulse generator, time-of-flight mass spectrometer and electronic equipment

Abstract

The invention provides a pulse generation circuit, a pulse generator, a time-of-flight mass spectrometer and electronic equipment, the circuit comprises a first DC power supply which is connected with a switch control module through a series high-voltage resistor and an energy storage module, and the switch control module comprises a switch tube and a plurality of switches; the pulse driving module is connected with the switching tube and is used for generating a peak signal of which the positive polarity and the negative polarity are alternately changed to switch on or switch off the switching tube; the plurality of photoelectric trigger modules are correspondingly connected with the switches and are used for generating trigger signals for controlling the switches to be switched off or switched on; and the pulse output module is connected with the switch control module, and is used for forming a positive pulse output loop or a negative pulse output loop according to the disconnection or connection of the plurality of switches when the switch tube is conducted, and generating a positive pulse signal or / and a negative pulse signal by using the output loop. Compared with a traditional high-voltage switch, heating power or a complex driving circuit is not needed, and meanwhile the high-voltage switch has the advantages of being very short in recovery time and low in jitter.

Description

technical field [0001] The invention relates to the technical field of mass spectrometry, in particular to a pulse generating circuit, a pulse generator, a time-of-flight mass spectrometer and electronic equipment. Background technique [0002] Matrix-assisted laser desorption ion source refers to that in a small area, in a very short time interval, the laser provides high energy to the sample and heats them very quickly, which can avoid thermal decomposition of heat-sensitive compounds, matrix molecules It can effectively absorb the energy of the laser and indirectly transfer it to the sample molecules, so as to be ionized. Since the process of laser bombardment of the sample is completed in a very short time, a high-voltage electric field and a nanosecond-level sudden change of electric field and laser are required. Pulse coordination enables the ionized ions to leave the sample plate after laser bombardment, delay in the high-voltage electric field, quickly accelerate in ...

AI Technical Summary

Problems solved by technology

[0003] The pulse generation circuit needs to use pulse signals of different polarities when the mass spectrometer analyzes different charged particles. However, the existing pulse generation circuit can only generate pulse signals of a single polarity, and cannot generate positive ions or / and negative ions

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