A digital measurement method and device for beam current position in an electron storage ring

Abstract

The invention discloses a digital measuring method and device of a beam position in an electronic storage ring; the related device comprises a simulation front end portion and a digital processing portion; the simulation front end portion employs an undersampling process to undersample input signals from a beam position detector, and controls a sampling rate quadruple that of an undersample outputsignal frequency, thus obtaining a digital quadrature I, Q sequence of input signals of the beam position detector; the data signal processing portion employs a down twice sampling rate on the digital quadrature I, Q sequence and multiply the sequence by plus / minus 1 so as to obtain an I sequence and a Q sequence; a data rate of the I and Q sequences is respectively and singly reduced by a CIC decimation filter and a FIR filter, and a CORDIC iteration algorithm unit calculates the amplitude of a beam position detector signal, thus obtaining the beam position. The method can use the simple device to realize all digital beam position measurement, thus simplifying a digital processing algorithm structure, reducing system processing pressure and storage pressure, and improving the measuring precision.

Description

technical field [0001] The invention relates to the field of accelerator beam current diagnosis, in particular to a digital measurement method and device for beam current position in an electron storage ring. Background technique [0002] The electron storage ring is a device that stores high-speed electron beams, and is an important device for particle physics research and synchrotron radiation research. Whether the characteristics of the beam current in the storage ring meet the requirements is very important for experimental research. Therefore, we need a beam measurement system to monitor and control the beam in the storage ring. [0003] The position of the beam cross-section is an important parameter in the electron storage ring, and there are many kinds of beam detectors that can be used to detect its position. The signal monitored by the detector needs to undergo electronic signal processing before it can be collected and analyzed. The commonly used processing meth...

AI Technical Summary

Problems solved by technology

However, the early full analog and analog-to-digital hybrid orthogonal transformations have disadvantages such as low precision, susceptibility to external interference, and complicated connections.

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