Accurate fine-tuning positioning device for electromagnet of mass spectrometer

Abstract

The invention belongs to an isotope analysis technology, and particularly relates to a mass spectrometer electromagnet accurate fine adjustment positioning device which comprises a magnet tray, a linkage guide rail arranged on the magnet tray and parallel to the movement direction of an electromagnet, and a lead screw adjusting mechanism connected with the electromagnet and fixed to the magnet tray. The linkage guide rail provides movement direction limitation for the electromagnet to be adjusted, so that the electromagnet moves relative to the magnet tray; the magnet tray is a main body of the device, and the tray is directly fastened by a screw and is arranged on the surface of a host bedplate, so that the influence of tray deformation, support displacement and the like on positioning and locking can be avoided. The locking mechanism locks the space position of the electromagnet, and it is ensured that the electromagnet can be stable for a long time in the locked state and is not prone to moving. The device has a multi-direction independent adjusting function; the adjustment precision is high, and the single-direction stepping fine adjustment amount is smaller than 0.2 mm.

Description

technical field [0001] The invention belongs to isotope analysis technology, in particular to a mass spectrometer electromagnet precise fine-tuning positioning device. Background technique [0002] Magnetic mass spectrometer is a large-scale analytical instrument that uses the principle that ions with different charge-to-mass ratios will be separated in an electromagnetic field to precisely measure the isotopic abundance of the substance to be measured. [0003] The mass analyzer is its core component, which is mainly composed of a separation electromagnet, a vacuum deflection flat tube, and an electromagnet adjustment and positioning device. The separation electromagnet is mainly composed of a pole piece and a wire package, which provides the required deflection magnetic field for the mass spectrometer. Vacuum deflection flat tubes provide a flight channel for ion flow in a vacuum environment. The adjustment and positioning device carries the electromagnet and provides po...

AI Technical Summary

Problems solved by technology

The stacked structure is flexible to adjust, but the installation error is large and the locking ability is weak; the orbital structure has poor adjustment freedom, and the motion trajectory is not parallel to the centerline position; the magnet corresponding to the tray structure has its own motion structure, and its tray can For height adjustment, the structure is easy to install and compact, but the tray support is not suitable for heavier solenoids, and the locking ability is weaker

In view of the heavy weight of the magnet used in the triple dispersive mass spectrometer and the high requirements for adjustment accuracy, the existing designs have deficiencies. Therefore, a new type of precise fine-tuning positioning device for the electromagnet of the mass spectrometer is designed.

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