Alignment method of multi-pole magnet based on three-coordinate measuring machine

Abstract

The application discloses a multi-pole magnet collimating method based on a three-coordinate measuring machine. The method comprises: S10, arranging a to-be-measured multi-pole magnet on a magnet support base; S20, measuring the position of the to-be-measured multi-pole magnet by using a three-coordinate measuring machine and establishing a reference coordinate system; S30, enabling a sensor to pass through an aperture of the to-be-measured multi-pole magnet and supporting the sensor on two electronically controlled translation stages; S40, measuring the position of the sensor by using the three-coordinate measuring machine and acquiring a position offset between the central axis of the sensor and the central axis of the to-be-measured multi-pole magnet; S50, determining whether the position offset is in a preset offset range; if so, indicating completion of magnetic field alignment of the to-be-measured multi-pole magnet; and if not, performing S60; and S60, adjusting the two electronically controlled translation stages and overlapping the central axis of the sensor and the central axis of the to-be-measured multi-pole magnet and returning to the S40 and S50. The collimating method having advantages of high accuracy and short time is suitable for collimating magnetic fields of various multi-pole magnets and for collimation between multi-pole magnets and various sensors.

Description

technical field [0001] This application generally relates to the magnetic field measurement technology of a particle accelerator, and specifically relates to a multi-pole magnet alignment method based on a three-coordinate measuring machine. Background technique [0002] Multipole magnets are the basic and important components of particle accelerators. Multipole magnets can be divided into dipole magnets, quadrupole magnets, and hexapole magnets according to their types. They are mainly used for beam deflection, beam focusing and elimination. beam dispersion. The beam of the particle accelerator passes through the air gap of the multi-pole magnet. When the coil is excited, there is a specific magnetic field in the magnet air gap. In order to ensure that the beam moves on the correct track, strict requirements are put forward for the quality of the magnetic field. In a high-energy synchrotron radiation accelerator, the number of magnets is large, the magnet aperture is small...

AI Technical Summary

Problems solved by technology

[0005] However, the magnet aperture of the new generation of high-energy accelerators is small, about 25mm. The reduction of the magnet aperture brings difficulties to the processing and manufacturing of the magnet and the acquisition of high-precision magnetic field quality, and at the same time puts forward higher requirements for the alignment accuracy of the magnet.

The alignment accuracy of the multi-pole magnets of the new generation of high-energy accelerators is required to be within 15 μm. The alignment accuracy of conventional laser trackers, levels, and theodolites cannot meet the requirements, and the alignment efficiency is low; and the existing alignment method is mainly to manually adjust the magnets. Position, so that the mechanical center of the magnet is consistent with the position of the sensor, which takes a long time

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