Quadrupole guide rod radio frequency power supply circuit of mass spectrometer
A technology of radio frequency power supply circuit and quadrupole guidance, which is applied in the direction of spectrometer circuit layout, mass spectrometer, particle separator tube parts, etc., which can solve the problems of fixed amplitude, single frequency, and small range of applicable ion mass
Active Publication Date: 2017-05-24
UNIV OF SCI & TECH OF CHINA
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[0004] In view of this, the present invention provides a quadrupole guide rod RF power supply circuit of a mass spectrometer to solve the problem in the prior art that the mass range of applicable ions is small due to the single frequency and fixed amplitude of the output high-frequency voltage signal
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[0061] 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 some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0062] The invention provides a quadrupole guide rod radio frequency power supply circuit of a mass spectrometer to solve the problem in the prior art that the mass range of applicable ions is small due to the single frequency and fixed amplitude of the output high frequency voltage signal.
[0063] Specifically, for the quadrupole guiding rod radio frequency power supply circuit of the mass spectrometer, see figure 1 , including: CPLD (Complex Programmable Lo...
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The invention provides a quadrupole guide rod radio frequency power supply circuit of a mass spectrometer. A CPLD signal source circuit outputs a frequency and amplitude adjustable high-frequency square wave signal; then, a drive circuit carries out amplification on the high-frequency square wave signal to generate a drive signal; and a radio frequency transformer circuit generates a sine wave radio frequency signal according to the drive signal and a feedback signal output by a feedback circuit and outputs the signal to a guide rod, wherein the feedback signal is a signal for carrying out retroegulation on the sine wave radio frequency signal when the sine wave radio frequency signal is beyond a preset range, that is, the quadrupole guide rod radio frequency power supply circuit of the mass spectrometer can set frequency and amplitude of the high-frequency square wave signals through software, and adjust the sine wave radio frequency signal through the feedback signal, so that frequency and voltage of the sine wave radio frequency signal are controlled to be suitable for ions in different quality ranges.
Description
Technical field [0001] The invention relates to the technical field of electronic instruments, and in particular to a quadrupole guide rod radio frequency power supply circuit of a mass spectrometer. Background technique [0002] The mass spectrometer is a chemical analysis instrument used to separate and detect different isotopes; the quadrupole guide rod RF power supply circuit is the driving power supply for the quadrupole ion guide part of the mass spectrometer and is used to output high-frequency AC signals. An alternating electric field is generated around the quadrupole of the mass spectrometer to focus the ions into an ion beam and move it in one direction to reduce the loss of ions during transmission, thereby achieving high-sensitivity analysis of the sample. [0003] Since the quadrupole guide rod has very high requirements for working stability, it has high requirements for the radio frequency power supply that drives the quadrupole guide rod; therefore, the trad...
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Login to View More IPC IPC(8): H01J49/26H01J49/02
CPCH01J49/022H01J49/26
Inventor 黄伟彭秀球黄腾
Owner UNIV OF SCI & TECH OF CHINA