Method for measuring particle accelerator beam position

Abstract

The invention relates to a method for measuring a particle accelerator beam position. The method for measuring the particle accelerator beam position includes: step S1, sampling N electrode signals of N electrodes of a stripe beam position probe through N channels when the beam passes through the probe; step S2, making up an M*N matrix X for the N electrode signals, and analyzing the principal components of the matrix X; step S3, calculating to obtain beam signal induction amplitudes which are corresponding to the N electrodes one by one, and outputting the N beam signal induction amplitudes through the N channels; step S4, comparing the N beam signal induction amplitudes output from the N channels and calculating to obtain a position signal of the beam. According to the method for measuring the particle accelerator beam position, the electrode signals of the electrode probes are formed into the matrix and are processed simultaneously through a principal component analysis method, and accordingly the noise of each electrode signal is eliminated effectively, and the beam position measuring precision is effectively improved.

Description

technical field [0001] The invention relates to the field of accelerator physics beam diagnosis, in particular to a method for measuring the beam position of a particle accelerator. Background technique [0002] For multi-electrode beam position detectors, the figure 1 Strip beam position detector 1 (probe) (BPM) with four electrodes A, B, C, D on the linear electron accelerator shown as an example ( figure 1 The mark "1" in the middle indicates the beam along the direction passing through the paper), and its design frequency reaches hundreds of megahertz. In order to obtain the position signal when the beam cluster passes, the signals output by the four electrodes of the probe need to be processed separately Afterwards, do the difference ratio sum operation such as formulas (1) and (2), so as to obtain the position information X and Y in the horizontal and vertical directions. [0003] X=k X (B-D) / (B+D) (1); [0004] Y=k y (A-C) / (A+C) (2); [0005] Among them, k X 、k...

AI Technical Summary

Problems solved by technology

[0007] Since the insertion loss of the signal network and the inconsistency of the acquisition and processing gain of the signal inevitably exist in the four channels, the above processing method is to perform signal processing on each channel separately, so this problem cannot be solved, which will lead to errors in the position calculation results

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