Integral measurement method and integral measurement device for magnetic field gradient of quadrupole magnet

Abstract

The method aims to solve the problems of an existing gradient integral measuring method during the rolling angle determining operation and the hall piece alignment operation. The invention provides anintegral measurement method and an integral measurement device for the magnetic field gradient of a quadrupole magnet. The method comprises the steps of 1) placing a to-be-tested quadrupole magnet onan optical platform and enabling the aperture direction of the quadrupole magnet to be in the Z-axis direction; 2) adjusting the hall piece to enable the normal line of the measuring plane of the hall piece to be perpendicular to the Z-axis direction; 3) moving the hall piece in the Y-axis direction, and observing the measurement reading change thereof; 4) adjusting the rolling angle of the to-be-tested quadrupole magnet around the Z-axis direction; 5) repeating the step 3) and the step 4) till the reading of the magnetic field measured during the movement of the hall piece along the Y-axis direction does not change again; 6) adjusting the hall piece to enable the hall piece in the aperture of the to-be-tested quadrupole magnet, carrying out measurement along the direction from (+d, 0, -L) to (+d, 0, +L), and recording the measurement value of the magnetic induction intensity B1; carrying out measurement along the direction from (-d, 0, -L) to (-d, 0, +L), and recording the measurement value of the magnetic induction intensity B2; 7) obtaining the gradient integral value (img file = 'DDA 0001503498900000000011.TIF 'wi = '851 'he = '166 ' ). According to the invention, the problemthat a conventional optical method depends on a mechanical reference is solved.

Description

technical field [0001] The invention relates to a measuring method and device for quadrupole magnetic field gradient integration in a particle accelerator. Background technique [0002] Quadrupole magnets are capable of focusing beams of charged particles and are commonly used in the field of particle accelerators. The quadrupole magnetic field formed by the quadrupole magnet is a magnetic field in which the magnetic induction intensity is linearly distributed with the position. The magnetic induction intensity is 0 at the center of the cross section, and the farther away from the center, the greater the magnetic induction intensity. For an ideal quadrupole magnet, the ratio of the change in magnetic induction intensity to the change in distance is a constant, which is called the magnetic field gradient, and the integral of the magnetic field gradient along the beam direction is the gradient integral. The gradient integral parameter represents the focusing effect of the qua...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems existing in determining the rolling angle and aligning with the Hall plate in the existing gradient integration measurement method, the present invention provides a quadrupole magnet magnetic field gradient integration measurement method and device

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