Device for sectionally driving ion funnel

Abstract

The invention provides a device for sectionally driving an ion funnel. The device comprises an alternating current power supply, a direct current power supply and an ion funnel device, the ion funnel device comprises 2N + 3 annular electrodes which are coaxially stacked at equal intervals, the first 2N annular electrodes are sequentially and equally divided into X groups of electrode groups, X is greater than or equal to 2, and N is an integral multiple of X; the alternating current power supply comprises X paths of outputs, and the first path of output to the Xth path of output of the alternating current power supply respectively supplies power to the first group of electrode groups to the Xth group of electrode groups of the ion funnel device in a one-to-one correspondence manner; the direct-current power supply comprises five outputs, the first output and the second output of the direct-current power supply are correspondingly applied to the first annular electrode and the 2Nth annular electrode of the ion funnel device respectively, and the third output to the fifth output of the direct-current power supply are correspondingly applied to the (2N + 1) th annular electrode to the (2N + 3) th annular electrode of the ion funnel device respectively. The device can effectively solve the problem of large natural capacitance value in the prior art, and is beneficial to the application of the ion funnel in mass spectrometers.

Description

technical field [0001] The invention belongs to the technical field of mass spectrometry, in particular to a device for segmentally driving an ion funnel. Background technique [0002] The ion funnel is a new type of ion guide device, which can efficiently capture ions under high pressure background (<10Torr) through the radial confinement of ions by radio frequency electric field and the axial advancement of ions by uniform electric field. , transmission and focusing, greatly improve the transmission efficiency of ions, and effectively improve the detection sensitivity of mass spectrometers. [0003] However, the ion funnel is composed of dozens or even hundreds of electrodes stacked coaxially and equidistantly. The inherent capacitance value is as high as several nF. It is extremely difficult to develop the required driving power. It is difficult to satisfy the key electrical parameters such as frequency and amplitude The transmission and focusing requirements of ion f...

AI Technical Summary

Problems solved by technology

[0004] In view of this, the object of the present invention is to provide a device for segmentally driving the ion funnel to solve the problem that the existing ion funnel is extremely difficult to develop the required driving power due to the large inherent capacitance value

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